mirror of https://github.com/wwarthen/RomWBW.git
Mark Pruden
11 months ago
5 changed files with 1954 additions and 20 deletions
@ -0,0 +1,328 @@ |
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BDOS .EQU 5 |
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; bdos commands |
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CONIN .EQU 1 |
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CONOUT .EQU 2 |
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DIRCONIO .EQU 6 |
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|
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; TODO for more routines see assign.asm |
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|
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; =============== |
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; INPUT |
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; Console Input |
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getchr: |
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PUSH BC |
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PUSH DE |
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PUSH HL |
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LD C,CONIN |
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CALL BDOS |
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POP HL |
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POP DE |
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POP BC |
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RET |
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|
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; direct console io |
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; BDOS 6 - FF FE FD - commands |
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conread: |
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RET |
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constatus: |
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RET |
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coninput: |
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RET |
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|
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; ======================================= |
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; STANDARD OUTPUT |
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|
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; |
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; Print character in A without destroying any registers |
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; |
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prtchr: |
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; PUSH AF |
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PUSH HL ; We must preserve HL, as the BDOS call sets it |
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PUSH BC |
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PUSH DE |
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LD C, CONOUT |
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LD E, A |
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CALL BDOS |
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POP DE |
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POP BC |
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POP HL |
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; POP AF |
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RET |
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; |
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prtdot: |
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push af |
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ld a, '.' |
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call prtchr |
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pop af |
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ret |
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; |
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; Print a zero terminated string at (HL) without destroying any registers |
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; |
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prtstr: |
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PUSH AF |
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PUSH BC |
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push de |
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prtstr1: |
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ld a,(hl) |
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or 0 |
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jr z,prtstr2 |
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ld c, CONOUT |
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ld e,a |
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push hl |
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call BDOS |
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pop hl |
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inc hl |
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jr prtstr1 |
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prtstr2: |
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pop de |
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pop bc |
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pop af |
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ret |
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|
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; |
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; Print the value in A in hex without destroying any registers |
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; |
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prthex: |
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push af ; save AF |
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push de ; save DE |
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call hexascii ; convert value in A to hex chars in DE |
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ld a,d ; get the high order hex char |
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call prtchr ; print it |
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ld a,e ; get the low order hex char |
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call prtchr ; print it |
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pop de ; restore DE |
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pop af ; restore AF |
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ret ; done |
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|
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; |
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; print the hex word value in bc |
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; |
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prthexword: |
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push af |
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ld a,b |
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call prthex |
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ld a,c |
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call prthex |
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pop af |
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ret |
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; |
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; Convert binary value in A to ascii hex characters in DE |
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; |
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hexascii: |
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ld d,a ; save A in D |
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call hexconv ; convert low nibble of A to hex |
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ld e,a ; save it in E |
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ld a,d ; get original value back |
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rlca ; rotate high order nibble to low bits |
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rlca |
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rlca |
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rlca |
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call hexconv ; convert nibble |
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ld d,a ; save it in D |
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ret ; done |
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; |
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; Convert low nibble of A to ascii hex |
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; |
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hexconv: |
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and 0Fh ; low nibble only |
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add a,90h |
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daa |
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adc a,40h |
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daa |
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ret |
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; |
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; Print the decimal value of A, with leading zero suppression |
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; |
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prtdec: |
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push hl |
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ld h,0 |
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ld l,a |
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call prtdecword ; print it |
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pop hl |
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ret |
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; |
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; Print the Decimal value (word) in HL |
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; |
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prtdecword: |
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push af |
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push bc |
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push de |
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push hl |
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call prtdec0 |
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pop hl |
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pop de |
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pop bc |
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pop af |
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ret |
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; |
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prtdec0: |
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ld e,'0' |
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ld bc,-10000 |
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call prtdec1 |
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ld bc,-1000 |
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call prtdec1 |
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ld bc,-100 |
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call prtdec1 |
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ld c,-10 |
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call prtdec1 |
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ld e,0 |
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ld c,-1 |
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prtdec1: |
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ld a,'0' - 1 |
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prtdec2: |
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inc a |
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add hl,bc |
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jr c,prtdec2 |
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sbc hl,bc |
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cp e |
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ret z |
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ld e,0 |
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call prtchr |
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ret |
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; |
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; Print a byte buffer in hex pointed to by DE |
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; Register A has size of buffer |
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; |
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prthexbuf: |
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or a |
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ret z ; empty buffer |
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prthexbuf1: |
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ld a,' ' |
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call prtchr |
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ld a,(de) |
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call prthex |
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inc de |
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djnz prthexbuf1 |
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ret |
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; |
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; Start a new Line |
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; |
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prtcrlf2: |
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call prtcrlf |
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prtcrlf: |
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push hl |
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ld hl, prtcrlf_msg |
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call prtstr |
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pop hl |
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ret |
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prtcrlf_msg: |
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.DB 13,10,0 |
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|
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; ================================= |
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; following is from dmamon util.asm |
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; |
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; IMMEDIATE PRINT |
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; ================================= |
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; |
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; PRINT A CHARACTER REFERENCED BY POINTER AT TOP OF STACK |
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; USAGE: |
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; CALL IPRTCHR |
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; .DB 'X' |
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; |
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iprtchr: |
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EX (SP),HL |
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PUSH AF |
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LD A,(HL) |
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CALL prtchr |
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POP AF |
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INC HL |
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EX (SP),HL |
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RET |
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; Print a string referenced by pointer at top of stack |
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; Usage |
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; call iprtstr |
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; .DB "text", 0 |
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; |
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iprtstr: |
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EX (SP),HL |
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CALL prtstr |
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INC HL |
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EX (SP),HL |
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RET |
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; |
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; =========================================================== |
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; |
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; Following is for INPUT, used to process command line args |
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; |
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; =========================================================== |
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; |
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; Skip whitespace at buffer adr in DE, returns with first |
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; non-whitespace character in A. |
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; |
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skipws: |
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ld a,(hl) ; get next char |
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or a ; check for eol |
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ret z ; done if so |
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cp ' ' ; blank? |
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ret nz ; nope, done |
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inc hl ; bump buffer pointer |
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jr skipws ; and loop |
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; |
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; Uppercase character in A |
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; |
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upcase: |
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cp 'a' ; below 'a'? |
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ret c ; if so, nothing to do |
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cp 'z'+1 ; above 'z'? |
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ret nc ; if so, nothing to do |
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and ~020h ; convert character to lower |
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ret ; done |
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; |
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; Get numeric chars at HL and convert to number returned in A |
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; Carry flag set on overflow |
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; C is used as a working register |
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; |
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getnum: |
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ld c,0 ; C is working register |
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getnum1: |
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ld a,(hl) ; get the active char |
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cp '0' ; compare to ascii '0' |
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jr c,getnum2 ; abort if below |
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cp '9' + 1 ; compare to ascii '9' |
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jr nc,getnum2 ; abort if above |
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; |
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ld a,c ; get working value to A |
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rlca ; multiply by 10 |
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ret c ; overflow, return with carry set |
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rlca ; ... |
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ret c ; overflow, return with carry set |
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add a,c ; ... |
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ret c ; overflow, return with carry set |
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rlca ; ... |
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ret c ; overflow, return with carry set |
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ld c,a ; back to C |
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ld a,(hl) ; get new digit |
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sub '0' ; make binary |
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add a,c ; add in working value |
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ret c ; overflow, return with carry set |
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ld c,a ; back to C |
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; |
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inc hl ; bump to next char |
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jr getnum1 ; loop |
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; |
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getnum2: |
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ld a,c ; return result in A |
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or a ; with flags set, CF is cleared |
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ret |
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; |
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; Is character in A numeric? NZ if not |
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; |
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isnum: |
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cp '0' ; compare to ascii '0' |
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jr c,isnum1 ; abort if below |
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cp '9' + 1 ; compare to ascii '9' |
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jr nc,isnum1 ; abort if above |
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cp a ; set Z |
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ret |
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isnum1: |
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or 0FFh ; set NZ |
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ret ; and done |
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File diff suppressed because it is too large
@ -0,0 +1,110 @@ |
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; |
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; Simple Block Compare for Comparison purposes |
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; Both HL and DL contain Block pointers to compare |
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; HL MUST start on an even block e.g. 8000h |
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; RET NZ - Failure, Z if no issue |
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; |
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_cmp20block |
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; inc de ; uncommnet to test crc fail! |
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ld bc, 20h ; 10t Size of Pointer Increment |
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_cmp20block1: |
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ld a, (de) ; 7t Do The comparison itself |
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cp (hl) ; 7t |
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JR NZ, _cmp20block2 ; 7t / 12t = 21t |
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add hl, bc ; 11t Add the Increment to both pointers |
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ex de, hl ; 4t |
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add hl, bc ; 11t |
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ex de, hl ; 4t = 30t |
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ld a, h ; 4t High order byte on Even Boundary |
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bit 4, a ; 8t has bit 4 been set then exceeded 1000h (4k boundary) |
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JR Z, _cmp20block1 ; 12t / 7t = 24t |
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xor a ; 4t |
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RET ; 10t Return Success |
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_cmp20block2: |
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scf ; signal CARRY FLAG Also |
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RET ; This is the error |
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; clock cycles for above |
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; add 40h -> 64 (loop) * 73t =>> 4,672 - 1.56% |
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; add 20h ->128 (loop) * 73t =>> 9,344 - 3.13% <= WENT WITH THIS |
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; add 10h ->256 (loop) * 73t =>> 18,688 - 6.25% |
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; accuracy = 88/4096 => 2.1% |
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; ===================================================================== |
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; From : https://tomdalby.com/other/crc.html |
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; And : https://map.grauw.nl/sources/external/z80bits.html#6.1 |
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; ===================================================================== |
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; |
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; ===================================================================== |
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; input - hl=start of memory to check, de=length of memory to check |
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; returns - a=result crc |
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; 20b |
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; ===================================================================== |
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; THE COMMNETED LINES NEED TO BE UNCOMMENTED |
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_crc8b: |
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xor a ; 4t - initial value so first byte can be XORed in (CCITT) |
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; ld c, 07h ; 7t - c=polyonimal used in loop (small speed up) |
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_byteloop8b: |
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xor (hl) ; 7t - xor in next byte, for first pass a=(hl) |
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inc hl ; 6t - next mem |
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; ld b, 8 ; 7t - loop over 8 bits |
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_rotate8b: |
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; add a,a ; 4t - shift crc left one |
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; jr nc, _nextbit8b ; 12/7t - only xor polyonimal if msb set (carry=1) |
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; xor c ; 4t - CRC8_CCITT = 0x07 |
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_nextbit8b: |
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; djnz _rotate8b ; 13/8t |
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ld b,a ; 4t - preserve a in b |
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dec de ; 6t - counter-1 |
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ld a,d ; 4t - check if de=0 |
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or e ; 4t |
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ld a,b ; 4t - restore a |
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jr nz, _byteloop8b ; 12/7t |
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ret ; 10t |
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; Clock Cycle For above with 4k bypes |
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; Loop = 4096 * 47 cycles + 11 => 192,523 x 2 (src/dest) => 385,046 |
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; acuracy = 1 / 256 => 0.4 % |
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; ===================================================================== |
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; CRC-CCITT |
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; |
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; CCITT polynomial 1021h |
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; Initial Value FFFFh |
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; |
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; input - de=start of memory to check, bc=length of memory to check |
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; returns - hl=result crc |
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; ===================================================================== |
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|
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_crc16: |
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ld hl, 0ffffh ; 10t - initial crc = $ffff |
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_byte16: |
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; push bc ; 11t - preserve counter |
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ld a,(de) ; 7t - get byte |
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inc de ; 6t - next mem |
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; xor h ; 4t - xor byte into crc high byte |
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; ld h,a ; 4t - back into high byte |
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; ld b,8 ; 7t - rotate 8 bits |
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_rotate16: |
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; add hl,hl ; 11t - rotate crc left one |
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; jr nc,_nextbit16 ; 12/7t - only xor polyonimal if msb set |
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; ld a,h ; 4t |
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; xor 10h ; 7t - high byte with $10 |
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; ld h,a ; 4t |
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; ld a,l ; 4t |
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; xor 21h ; 7t - low byte with $21 |
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; ld l,a ; 4t - hl now xor $1021 |
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_nextbit16: |
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; djnz _rotate16 ; 13/8t - loop over 8 bits |
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; pop bc ; 10t - bring back main counter |
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dec bc ; 6t |
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ld a,b ; 4t |
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or c ; 4t |
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jr nz,_byte16 ; 12/7t |
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ret ; 10t |
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; |
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@ -0,0 +1,178 @@ |
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; |
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; HBIOS FUNCTIONS |
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; |
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; |
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BF_DIO .EQU 010H |
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BF_DIOSTATUS .EQU BF_DIO + 0 ; DISK STATUS |
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BF_DIORESET .EQU BF_DIO + 1 ; DISK RESET |
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BF_DIOSEEK .EQU BF_DIO + 2 ; DISK SEEK |
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BF_DIOREAD .EQU BF_DIO + 3 ; DISK READ SECTORS |
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BF_DIOWRITE .EQU BF_DIO + 4 ; DISK WRITE SECTORS |
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BF_DIOVERIFY .EQU BF_DIO + 5 ; DISK VERIFY SECTORS |
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BF_DIOFORMAT .EQU BF_DIO + 6 ; DISK FORMAT TRACK |
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BF_DIODEVICE .EQU BF_DIO + 7 ; DISK DEVICE INFO REPORT |
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BF_DIOMEDIA .EQU BF_DIO + 8 ; DISK MEDIA REPORT |
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BF_DIODEFMED .EQU BF_DIO + 9 ; DEFINE DISK MEDIA |
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BF_DIOCAP .EQU BF_DIO + 10 ; DISK CAPACITY REPORT |
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BF_DIOGEOM .EQU BF_DIO + 11 ; DISK GEOMETRY REPORT |
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; |
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BF_SYS .EQU 0F0H |
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BF_SYSRESET .EQU BF_SYS + 0 ; SOFT RESET HBIOS |
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BF_SYSVER .EQU BF_SYS + 1 ; GET HBIOS VERSION |
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BF_SYSSETBNK .EQU BF_SYS + 2 ; SET CURRENT BANK |
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BF_SYSGETBNK .EQU BF_SYS + 3 ; GET CURRENT BANK |
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BF_SYSSETCPY .EQU BF_SYS + 4 ; BANK MEMORY COPY SETUP |
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BF_SYSBNKCPY .EQU BF_SYS + 5 ; BANK MEMORY COPY |
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BF_SYSALLOC .EQU BF_SYS + 6 ; ALLOC HBIOS HEAP MEMORY |
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BF_SYSFREE .EQU BF_SYS + 7 ; FREE HBIOS HEAP MEMORY |
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BF_SYSGET .EQU BF_SYS + 8 ; GET HBIOS INFO |
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BF_SYSSET .EQU BF_SYS + 9 ; SET HBIOS PARAMETERS |
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BF_SYSPEEK .EQU BF_SYS + 10 ; GET A BYTE VALUE FROM ALT BANK |
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BF_SYSPOKE .EQU BF_SYS + 11 ; SET A BYTE VALUE IN ALT BANK |
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BF_SYSINT .EQU BF_SYS + 12 ; MANAGE INTERRUPT VECTORS |
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; |
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BF_SYSGET_CIOCNT .EQU 00h ; GET CHAR UNIT COUNT |
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BF_SYSGET_CIOFN .EQU 01h ; GET CIO UNIT FN/DATA ADR |
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BF_SYSGET_DIOCNT .EQU 10h ; GET DISK UNIT COUNT |
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BF_SYSGET_DIOFN .EQU 11h ; GET DIO UNIT FN/DATA ADR |
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BF_SYSGET_RTCCNT .EQU 20h ; GET RTC UNIT COUNT |
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BF_SYSGET_DSKYCNT .EQU 30h ; GET DSKY UNIT COUNT |
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BF_SYSGET_VDACNT .EQU 40h ; GET VDA UNIT COUNT |
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BF_SYSGET_VDAFN .EQU 41h ; GET VDA UNIT FN/DATA ADR |
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BF_SYSGET_SNDCNT .EQU 50h ; GET VDA UNIT COUNT |
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BF_SYSGET_SNDFN .EQU 51h ; GET SND UNIT FN/DATA ADR |
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BF_SYSGET_TIMER .EQU 0D0h ; GET CURRENT TIMER VALUE |
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BF_SYSGET_SECS .EQU 0D1h ; GET CURRENT SECONDS VALUE |
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BF_SYSGET_BOOTINFO .EQU 0E0h ; GET BOOT INFORMATION |
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BF_SYSGET_CPUINFO .EQU 0F0h ; GET CPU INFORMATION |
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BF_SYSGET_MEMINFO .EQU 0F1h ; GET MEMORY CAPACTITY INFO |
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BF_SYSGET_BNKINFO .EQU 0F2h ; GET BANK ASSIGNMENT INFO |
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BF_SYSGET_CPUSPD .EQU 0F3h ; GET CLOCK SPEED & WAIT STATES |
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BF_SYSGET_PANEL .EQU 0F4h ; GET FRONT PANEL SWITCHES VAL |
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BF_SYSGET_APPBNKS .EQU 0F5h ; GET APP BANK INFORMATION |
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; |
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; MEDIA ID VALUES |
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; |
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MID_NONE .EQU 0 |
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MID_MDROM .EQU 1 |
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MID_MDRAM .EQU 2 |
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MID_RF .EQU 3 |
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MID_HD .EQU 4 |
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MID_FD720 .EQU 5 |
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MID_FD144 .EQU 6 |
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MID_FD360 .EQU 7 |
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MID_FD120 .EQU 8 |
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MID_FD111 .EQU 9 |
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MID_HDNEW .EQU 10 |
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|
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; ----------------- |
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; |
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; Read timer in sconds. |
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; |
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sysgetseconds: |
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ld b,BF_SYSGET |
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ld c,BF_SYSGET_SECS |
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rst 08 ; do it |
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ret |
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|
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; ----------------- |
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; |
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; Return non zero if A (media ID) |
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; is a type of hard drive |
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; If not A=0 and Z flag is set |
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; |
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isaharddrive: |
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cp MID_HD |
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jr z, ishdd1 |
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cp MID_HDNEW |
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jr z, ishdd1 |
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xor a ; clear A and set Z flag |
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ret |
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ishdd1: |
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or a ; set Z flag and return |
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ret |
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|
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; ------------------------------------- |
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; |
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; used to pass the buffer address argument |
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; |
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bankid .DB 0 ; bank id used for read writes |
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dma .DW 8000h ; address argument for read write |
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; |
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; |
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; basic setup for disk io |
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; call to get the current bank IO |
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; |
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initdiskio: |
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; Get current RAM bank |
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ld b,BF_SYSGETBNK ; HBIOS GetBank function |
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RST 08 ; do it via RST vector, C=bank id |
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JP NZ, err_hbios |
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ld a,c ; put bank id in A |
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ld (bankid),a ; put bank id in Argument |
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RET |
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; |
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; |
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; Read disk sector(s) |
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; DE:HL is LBA, B is sector count, C is disk unit |
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; (dma) is the buffer address |
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; (bankid) is the memory bank |
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; Returns E sectors read, and A status |
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; |
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diskread: |
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; Seek to requested sector in DE:HL |
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push bc ; save unit & count |
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set 7,d ; set LBA access flag |
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ld b,BF_DIOSEEK ; HBIOS func: seek |
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rst 08 ; do it |
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pop bc ; recover unit & count |
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jp nz,err_diskio ; handle error |
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|
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; Read sector(s) into buffer |
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ld e,b ; transfer count |
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ld b,BF_DIOREAD ; HBIOS func: disk read |
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ld hl,(dma) ; read into info sec buffer |
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ld a,(bankid) ; user bank |
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ld d,a |
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rst 08 ; do it |
|||
jp nz,err_diskio ; handle error |
|||
xor a ; signal success |
|||
ret ; and done |
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; |
|||
; Write disk sector(s) |
|||
; DE:HL is LBA, B is sector count, C is disk unit |
|||
; (dma) is the buffer address |
|||
; (bankid) is the memory bank |
|||
; Returns E sectors written, and A status |
|||
; |
|||
diskwrite: |
|||
; Seek to requested sector in DE:HL |
|||
push bc ; save unit & count |
|||
set 7,d ; set LBA access flag |
|||
ld b,BF_DIOSEEK ; HBIOS func: seek |
|||
rst 08 ; do it |
|||
pop bc ; recover unit & count |
|||
jp nz,err_diskio ; handle error |
|||
|
|||
; Write sector(s) from buffer |
|||
ld e,b ; transfer count |
|||
ld b,BF_DIOWRITE ; HBIOS func: disk write |
|||
ld hl,(dma) ; write from sec buffer |
|||
ld a,(bankid) ; user bank |
|||
ld d,a |
|||
rst 08 ; do it |
|||
jp nz,err_diskio ; handle error |
|||
xor a ; signal success |
|||
ret ; and done |
|||
; |
|||
err_diskio: |
|||
; push hl |
|||
; ld hl,str_err_prefix |
|||
; call prtstr |
|||
; pop hl |
|||
; or 0ffh ; signal error |
|||
ret ; done |
|||
|
|||
;str_err_prefix db 13,10,13,10,"*** ",0 |
|||
|
|||
|
|||
Loading…
Reference in new issue