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326 lines
6.7 KiB
326 lines
6.7 KiB
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;==================================================================================================
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; M6242 CLOCK DRIVER
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;==================================================================================================
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;
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M6242RTC_BUFSIZ .EQU 6 ; SIX BYTE BUFFER (YYMMDDHHMMSS)
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;
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; RTC DEVICE INITIALIZATION ENTRY
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;
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; TODO:
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; set the day of week register
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;; NOTES FOR USING DRIVER IN Z-DOS
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; First load the LDDS datestamper
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; A:LDDS
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; next prepare and drives with datestamper info:
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; eg: a:putds -d=g: -V
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; then view date time of files with:
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; a:filedate
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M6242RTC_REG_1SEC .EQU $00
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M6242RTC_REG_10SEC .EQU $01
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M6242RTC_REG_1MIN .EQU $02
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M6242RTC_REG_10MIN .EQU $03
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M6242RTC_REG_1HR .EQU $04
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M6242RTC_REG_10HR .EQU $05
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M6242RTC_REG_1DAY .EQU $06
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M6242RTC_REG_10DAY .EQU $07
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M6242RTC_REG_1MNTH .EQU $08
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M6242RTC_REG_10MNTH .EQU $09
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M6242RTC_REG_1YEAR .EQU $0A
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M6242RTC_REG_10YEAR .EQU $0B
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M6242RTC_REG_DAYWEEK .EQU $0C ; NOT USED BY THIS DRIVER
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M6242RTC_REG_CONTROL1 .EQU $0D
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M6242RTC_REG_CONTROL2 .EQU $0E
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M6242RTC_REG_CONTROL3 .EQU $0F
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DEVECHO "M6242RTC: IO="
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DEVECHO M6242RTC_BASE
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DEVECHO "\n"
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M6242RTC_INIT:
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LD A, (RTC_DISPACT) ; RTC DISPATCHER ALREADY SET?
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OR A ; SET FLAGS
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RET NZ ; IF ALREADY ACTIVE, ABORT
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CALL NEWLINE ; FORMATTING
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PRTS("M6242RTC: $")
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; PRINT RTC LATCH PORT ADDRESS
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PRTS("IO=0x$") ; LABEL FOR IO ADDRESS
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LD A,M6242RTC_BASE ; GET IO ADDRESS
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CALL PRTHEXBYTE ; PRINT IT
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CALL PC_SPACE ; FORMATTING
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; CHECK PRESENCE STATUS
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CALL M6242RTC_DETECT ; HARDWARE DETECTION
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JR Z, M6242RTC_INIT1 ; IF ZERO, ALL GOOD
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PRTS("NOT PRESENT$") ; NOT ZERO, H/W NOT PRESENT
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OR $FF ; SIGNAL FAILURE
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RET ; BAIL OUT
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M6242RTC_INIT1:
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; ENSURE DEVICE IS RESET AND NOT IN TEST MODE
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LD A, 05h ; TURN OFF ALL TEST MODE BITS, SET 24 HOUR
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OUT (M6242RTC_REG_CONTROL3 + M6242RTC_BASE), A
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LD A, 05h ; TURN OFF ALL TEST MODE BITS, SET 24 HOUR
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OUT (M6242RTC_REG_CONTROL3 + M6242RTC_BASE), A
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LD A, 04h ; TURN OFF ALL TEST MODE BITS, SET 24 HOUR
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OUT (M6242RTC_REG_CONTROL3 + M6242RTC_BASE), A
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LD A, 00h ; LET CLOCK RUN
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OUT (M6242RTC_REG_CONTROL1 + M6242RTC_BASE), A
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OUT (M6242RTC_REG_CONTROL2 + M6242RTC_BASE), A
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; DISPLAY CURRENT TIME
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LD HL, M6242RTC_BCDBUF ; POINT TO BCD BUF
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CALL M6242RTC_GETTIM
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CALL PRTDT
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;
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LD BC, M6242RTC_DISPATCH
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CALL RTC_SETDISP
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;
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XOR A ; SIGNAL SUCCESS
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RET
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;
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; DETECT RTC HARDWARE PRESENCE
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;
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M6242RTC_DETECT:
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LD A, 01h ; TURN ON REST BIT
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OUT (M6242RTC_REG_CONTROL3 + M6242RTC_BASE), A
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CALL DLY64
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CALL DLY64
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IN A,(M6242RTC_REG_CONTROL3 + M6242RTC_BASE)
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AND 01h
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CP 01h
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JR NZ, M6242RTC_DETECTERR ; IF NOT MATCH, ERROR
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LD A, 00h ; TURN OFF REST BIT
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OUT (M6242RTC_REG_CONTROL3 + M6242RTC_BASE), A
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CALL DLY64
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CALL DLY64
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IN A,(M6242RTC_REG_CONTROL3 + M6242RTC_BASE)
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AND 01h
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CP 00h
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JR NZ, M6242RTC_DETECTERR ; IF NOT MATCH, ERROR
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LD A, 0 ; ASSUME OK
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OR A ; SET FLAGS
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RET
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M6242RTC_DETECTERR:
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LD A, $FF ; ELSE STATUS IS ERROR
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OR A ; SET FLAGS
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RET
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;
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; RTC DEVICE FUNCTION DISPATCH ENTRY
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; A: RESULT (OUT), 0=OK, Z=OK, NZ=ERR
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; B: FUNCTION (IN)
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;
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M6242RTC_DISPATCH:
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LD A,B ; GET REQUESTED FUNCTION
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AND $0F ; ISOLATE SUB-FUNCTION
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JP Z,M6242RTC_GETTIM ; GET TIME
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DEC A
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JP Z,M6242RTC_SETTIM ; SET TIME
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DEC A
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JP Z,M6242RTC_GETBYT ; GET NVRAM BYTE VALUE
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DEC A
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JP Z,M6242RTC_SETBYT ; SET NVRAM BYTE VALUE
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DEC A
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JP Z,M6242RTC_GETBLK ; GET NVRAM DATA BLOCK VALUES
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DEC A
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JP Z,M6242RTC_SETBLK ; SET NVRAM DATA BLOCK VALUES
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DEC A
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JP Z,M6242RTC_GETALM ; GET ALARM
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DEC A
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JP Z,M6242RTC_SETALM ; SET ALARM
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DEC A
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JP Z,M6242RTC_DEVICE ; REPORT RTC DEVICE INFO
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SYSCHKERR(ERR_NOFUNC)
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RET
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;
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; RTC GET NVRAM BYTE
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; C: INDEX
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; E: VALUE (OUTPUT)
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; A:0 IF OK, ERR_RANGE IF OUT OF RANGE
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;
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M6242RTC_GETBYT:
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M6242RTC_SETBYT:
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M6242RTC_GETBLK:
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M6242RTC_SETBLK:
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M6242RTC_GETALM:
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M6242RTC_SETALM:
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SYSCHKERR(ERR_NOTIMPL)
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RET
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;
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; RTC GET TIME
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; A: RESULT (OUT), 0=OK, Z=OK, NZ=ERR
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; HL: DATE/TIME BUFFER (OUT)
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; BUFFER FORMAT IS BCD: YYMMDDHHMMSS
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; 24 HOUR TIME FORMAT IS ASSUMED
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;
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M6242RTC_GETTIM:
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PUSH HL
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PUSH BC
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IN A,(M6242RTC_REG_10YEAR + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1YEAR + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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IN A,(M6242RTC_REG_10MNTH + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1MNTH + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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IN A,(M6242RTC_REG_10DAY + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1DAY + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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IN A,(M6242RTC_REG_10HR + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1HR + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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IN A,(M6242RTC_REG_10MIN + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1MIN + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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IN A,(M6242RTC_REG_10SEC + M6242RTC_BASE)
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RLA
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RLA
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RLA
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RLA
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LD C,A
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IN A,(M6242RTC_REG_1SEC + M6242RTC_BASE)
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AND 0FH
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OR C
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LD (HL),A
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INC HL
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POP BC
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POP HL
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XOR A ; SIGNAL SUCCESS
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RET ; AND RETURN
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;
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;
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; RTC SET TIME
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; A: RESULT (OUT), 0=OK, Z=OK, NZ=ERR
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; HL: DATE/TIME BUFFER (IN)
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; BUFFER FORMAT IS BCD: YYMMDDHHMMSSWW
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; 24 HOUR TIME FORMAT IS ASSUMED
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;
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M6242RTC_SETTIM:
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PUSH HL
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LD A, (HL)
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OUT (M6242RTC_REG_1YEAR + M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10YEAR + M6242RTC_BASE), A
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INC HL
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LD A, (HL)
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OUT (M6242RTC_REG_1MNTH + M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10MNTH + M6242RTC_BASE), A
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INC HL
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LD A, (HL)
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OUT (M6242RTC_REG_1DAY+ M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10DAY + M6242RTC_BASE), A
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INC HL
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LD A, (HL)
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OUT (M6242RTC_REG_1HR + M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10HR + M6242RTC_BASE), A
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INC HL
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LD A, (HL)
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OUT (M6242RTC_REG_1MIN + M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10MIN + M6242RTC_BASE), A
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INC HL
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LD A, (HL)
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OUT (M6242RTC_REG_1SEC + M6242RTC_BASE), A
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RRA
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RRA
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RRA
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RRA
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OUT (M6242RTC_REG_10SEC + M6242RTC_BASE), A
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POP HL
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XOR A ; SIGNAL SUCCESS
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RET ; AND RETURN
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;
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; REPORT RTC DEVICE INFO
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;
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M6242RTC_DEVICE:
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LD D,RTCDEV_M6242 ; D := DEVICE TYPE
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LD E,0 ; E := PHYSICAL DEVICE NUMBER
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LD H,0 ; H := 0, DRIVER HAS NO MODES
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LD L,0 ; L := 0, NO I/O ADDRESS
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XOR A ; SIGNAL SUCCESS
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RET
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M6242RTC_BCDBUF:
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RP5RTC_YR .DB 20
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RP5RTC_MO .DB 01
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RP5RTC_DT .DB 01
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RP5RTC_HH .DB 00
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RP5RTC_MM .DB 00
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RP5RTC_SS .DB 00
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