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@ -23,7 +23,7 @@ MD_ATTRIB .EQU 7 ; OFFSET OF ATTRIBUTE (BYTE) |
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; |
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MD_AROM .EQU %00010100 ; ROM ATTRIBUTE |
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MD_ARAM .EQU %00010101 ; RAM ATTRIBUTE |
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MD_AFSH .EQU %00010111 ; FLASH ATTRIBUTE |
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MD_AFSH .EQU %00010110 ; FLASH ATTRIBUTE |
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; |
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MD_FDBG .EQU 0 ; FLASH DEBUG CODE |
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MD_FVBS .EQU 1 ; FLASH VERBOSE OUTPUT |
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@ -109,9 +109,9 @@ MD_INIT: |
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; SETUP THE DIO TABLE ENTRIES |
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; |
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#IF (MDROM & MDFFENABLE) |
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LD A,(MD_FFSEN) ; IF FLASH |
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OR A ; FILESYSTEM |
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JR NZ,MD_INIT1 ; CAPABLE, |
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LD A,(MD_FFSEN) ; IF FLASH |
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OR A ; FILESYSTEM |
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JR NZ,MD_INIT1 ; CAPABLE, |
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LD A,MD_AFSH ; UPDATE ROM DIO |
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LD (MD_CFGTBL + MD_CFGSIZ + MD_ATTRIB),A |
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MD_INIT1: |
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@ -177,7 +177,7 @@ MD_RESET: |
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RET |
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; |
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; |
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; |
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; |
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MD_CAP: ; ASSUMES THAT UNIT 0 IS RAM, UNIT 1 IS ROM |
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LD A,(IY+MD_DEV) ; GET DEVICE NUMBER |
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OR A ; SET FLAGS |
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@ -259,7 +259,7 @@ MD_READ: |
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; |
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#IF (MDFFENABLE) |
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LD A,(IY+MD_ATTRIB) ; GET ADR OF SECTOR READ FUNC |
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LD BC,MD_RDSECF ; |
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LD BC,MD_RDSECF ; |
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CP MD_AFSH ; RAM / ROM = MD_RDSEC |
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JR Z,MD_RD1 ; FLASH = MD_RDSECF |
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#ENDIF |
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@ -275,7 +275,7 @@ MD_WRITE: |
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; |
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#IF (MDFFENABLE) |
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LD A,(IY+MD_ATTRIB) ; GET ADR OF SECTOR WRITE FUNC |
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LD BC,MD_WRSECF ; |
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LD BC,MD_WRSECF ; |
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CP MD_AFSH ; RAM / ROM = MD_WRSEC |
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JR Z,MD_WR1 ; FLASH = MD_WRSECF |
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#ENDIF |
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@ -371,7 +371,7 @@ MD_SECM: |
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LD D,A ; FROM THE START |
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LD E,0 |
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; |
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LD HL,MD_F4KBUF ; POINT TO THE SECTOR WE |
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LD HL,MD_F4KBUF ; POINT TO THE SECTOR WE |
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ADD HL,DE ; WANT TO COPY |
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LD DE,(MD_DSKBUF) |
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; |
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@ -385,7 +385,7 @@ MD_SECM: |
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JP DMALDIR ; 4K SECTOR TO THE DISK BUFFER |
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#ENDIF |
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MD_NODMA: |
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#IF (!(DMAENABLE & (DMAMODE!=DMAMODE_NONE))) |
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#IF (!(DMAENABLE & (DMAMODE!=DMAMODE_NONE))) |
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LD BC,512 ; COPY ONE 512B SECTOR FROM THE |
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LDIR ; 4K SECTOR TO THE DISK BUFFER |
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XOR A |
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@ -407,7 +407,7 @@ MD_NODMA: |
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; |
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MD_IOSETUPF: |
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LD L,(IY+MD_LBA+0) ; HL := LOW WORD OF LBA |
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LD H,(IY+MD_LBA+1) |
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LD H,(IY+MD_LBA+1) |
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INC H ; SKIP FIRST 128MB (256 SECTORS) |
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; |
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LD A,L ; SAVE LBA 4K |
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@ -421,7 +421,7 @@ MD_IOSETUPF: |
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LD L,D ; DE:HL = HLX512 |
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SLA H |
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RL E |
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RL D |
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RL D |
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; |
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RET |
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; |
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@ -443,7 +443,7 @@ MD_CALBAS: |
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; |
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#IF (MD_FDBG==1) |
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CALL PC_SPACE ; DISPLAY SECTOR |
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CALL PRTHEX32 ; SECTOR ADDRESS |
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CALL PRTHEX32 ; SECTOR ADDRESS |
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CALL PC_SPACE ; IN DE:HL |
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#ENDIF |
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; |
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@ -478,7 +478,7 @@ MD_WRSECF: ; CALLED FROM MD_RW |
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PUSH HL ; IS THE SECTOR |
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LD HL,(MD_LBA4K) ; WE WANT TO |
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XOR A ; WRITE ALREADY |
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SBC HL,BC ; IN THE 4K |
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SBC HL,BC ; IN THE 4K |
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POP HL ; BLOCK WE HAVE |
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JR Z,MD_SECM1 ; IN THE BUFFER |
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; |
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@ -504,7 +504,7 @@ MD_SECM1: ; DESIRED SECTOR IS IN BUFFER |
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LD D,A ; FROM THE START |
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LD E,0 |
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; |
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LD HL,MD_F4KBUF ; POINT TO THE SECTOR WE |
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LD HL,MD_F4KBUF ; POINT TO THE SECTOR WE |
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ADD HL,DE ; WANT TO COPY |
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EX DE,HL |
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; |
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@ -562,7 +562,7 @@ MD_LBA4K .DW $FFFF ; LBA OF CURRENT SECTOR |
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MD_FBAS .DW $FFFF ; BANK AND SECTOR |
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#ENDIF |
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; |
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; READ RAM / ROM |
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; READ RAM / ROM |
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; |
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MD_RDSEC: |
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CALL MD_IOSETUP ; SETUP FOR MEMORY COPY |
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@ -744,7 +744,7 @@ MDSTR_LEN .TEXT "LEN=$" |
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; FLASH DRIVERS |
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;================================================================================================== |
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; |
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; UPPER RAM BANK IS ALWAYS AVAILABLE REGARDLESS OF MEMORY BANK SELECTION. |
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; UPPER RAM BANK IS ALWAYS AVAILABLE REGARDLESS OF MEMORY BANK SELECTION. |
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; HBX_BNKSEL AND HB_CURBNK ARE ALWAYS AVAILABLE IN UPPER MEMORY. |
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; |
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; THE STACK IS IN UPPER MEMORY DURING BIOS INITIALIZATION BUT IS IN LOWER |
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@ -754,7 +754,7 @@ MDSTR_LEN .TEXT "LEN=$" |
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; AND THE FLASH CHIP IS SWITCHED INTO THE LOWER BANK. |
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; |
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; EACH FLASH ROUTINE MUST FIT INTO TO THE HBX_BUF, INCLUDING IT'S LOCAL STACK WHICH |
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; IS REQUIRED FOR CALLING THE BANK SWITCH ROUTINES. |
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; IS REQUIRED FOR CALLING THE BANK SWITCH ROUTINES. |
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; |
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; INSPIRED BY WILL SOWERBUTTS FLASH4 UTILITY - https://github.com/willsowerbutts/flash4/ |
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; |
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@ -775,7 +775,7 @@ MD_FINIT: |
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CALL MD_CALCU ; DISPLAY |
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; |
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#IF (MD_FVBS==1) |
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CALL NEWLINE ; OF UNITS |
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CALL NEWLINE ; OF UNITS |
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PRTS("MD: FLASH=$") |
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CALL PRTDECB ; CONFIGURED FOR. |
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#ENDIF |
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@ -786,14 +786,14 @@ MD_PROBE: |
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LD E,C ; |
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LD H,D ; WE INCREASE E BY $08 |
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LD L,D ; ON EACH CYCLE THROUGH |
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; |
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; |
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PUSH BC |
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#IF (MD_FVBS==1) |
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CALL PC_SPACE |
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CALL MD_CALCU |
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INC A |
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SUB B ; PRINT |
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CALL PRTDECB ; DEVICE |
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CALL PRTDECB ; DEVICE |
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LD A,'=' ; NUMBER |
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CALL COUT |
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#ENDIF |
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@ -872,7 +872,7 @@ MD_NXT1: |
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CP C |
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JR NZ,MD_NXT0 ; FIRST BYTE DOES NOT MATCH |
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; |
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INC HL |
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INC HL |
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LD A,(HL) |
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CP B |
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DEC HL |
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@ -903,18 +903,18 @@ MD_NXT2: |
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;====================================================================== |
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; COMMON FUNCTION CALL FOR: |
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; |
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; MD_FIDEN_R - IDENTIFY FLASH CHIP |
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; MD_FIDEN_R - IDENTIFY FLASH CHIP |
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; ON ENTRY MD_FBAS HAS BEEN SET WITH BANK AND SECTOR BEING ACCESSED |
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; HL POINTS TO THE ROUTINE TO BE RELOCATED AND CALLED |
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; ON EXIT BC CONTAINS THE CHIP ID BYTES. |
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; A NO STATUS IS RETURNED |
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; A NO STATUS IS RETURNED |
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; |
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; MD_FERAS_R - ERASE FLASH SECTOR |
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; MD_FERAS_R - ERASE FLASH SECTOR |
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; ON ENTRY MD_FBAS HAS BEEN SET WITH BANK AND SECTOR BEING ACCESSED |
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; HL POINTS TO THE ROUTINE TO BE RELOCATED AND CALLED |
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; ON EXIT A RETURNS STATUS 0=SUCCESS NZ=FAIL |
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; |
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; MD_FREAD_R - READ FLASH SECTOR |
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; MD_FREAD_R - READ FLASH SECTOR |
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; ON ENTRY MD_FBAS HAS BEEN SET WITH BANK AND SECTOR BEING ACCESSED |
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; HL POINTS TO THE ROUTINE TO BE RELOCATED AND CALLED |
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; IX POINTS TO WHERE TO SAVE DATA |
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@ -926,7 +926,7 @@ MD_NXT2: |
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; IX POINTS TO DATA TO COMPARE. |
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; ON EXIT A RETURNS STATUS 0=SUCCESS NZ=FAIL |
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; |
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; MD_FWRIT_R - WRITE FLASH SECTOR |
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; MD_FWRIT_R - WRITE FLASH SECTOR |
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; ON ENTRY MD_FBAS HAS BEEN SET WITH BANK AND SECTOR BEING ACCESSED |
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; HL POINTS TO THE ROUTINE TO BE RELOCATED AND CALLED |
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; IX POINTS TO DATA TO BE WRITTEN |
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@ -979,7 +979,7 @@ MD_FNCALL: ; USING HBX_BUF FOR CODE AREA |
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LD A,C ; RETURN WITH STATUS IN A |
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RET ; RETURN TO MD_READF, MD_WRITEF |
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; |
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MD_SAVSTK .DW 0 |
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MD_SAVSTK .DW 0 |
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; |
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#INCLUDE "flashlib.inc" |
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; |
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Mark Pruden
1 year ago