; CP/M CONSOLE & PRINTER INTERFACE ; ; Last update: ; ; 850511 - Saved BC' prior to CP/M calls ; 841010 - Saved IX & IY prior to CP/M calls ; 840909 - Converted all BIOS calls to BDOS calls for compatibility ; with CP/M 3.0 ; ; ; LSTOUT EQU 05H ;printer output DCONIO EQU 06H ;direct console I/O ; RUBOUT EQU 7FH INPREQ EQU 0FFH ;DCONIO input request ; EPRINT: DEFB 0 ;printer flag ;0=disabled, 1=enabled ; SYSENT: PUSH BC PUSH DE PUSH HL PUSH IX PUSH IY exx push bc ;save ip (if used as such) exx CALL BDOSS ;perform function (C) exx pop bc ;restore ip exx POP IY POP IX POP HL POP DE POP BC RET ; CSTAT: PUSH BC LD C,DCONIO ;direct console I/O LD E,INPREQ ;input request CALL SYSENT ;any CHR typed? POP BC ;if yes, (A)<--CHAR RET ;else (A)<--00H (ignore CHR) ; CIN: PUSH BC LD C,DCONIO ;direct console I/O LD E,INPREQ ;request input CINLP: CALL SYSENT ;(A)<--CHR (or 0 if nothing typed) OR A JR Z,CINLP ;wait for CHR to be typed CP RUBOUT JR NZ,CIN1 LD A,BSOUT ;convert RUB to ^H CIN1: RES 7,A ;(MSB)<--0 POP BC RET ; COUT: PUSH BC PUSH DE ;save (E) = CHR LD C,DCONIO ;direct console output CALL SYSENT ;send (E) to CON: POP DE POP BC RET ; POUT: PUSH BC LD C,LSTOUT CALL SYSENT ;send (E) to LST: POP BC RET ; CPOUT: CALL COUT ;send (E) to console LD A,(EPRINT) OR A ;if (EPRINT) <> 0 CALL NZ,POUT ;send (E) to LST: RET ; ; FORTH TO CP/M SERIAL I/O INTERFACE ; PQTER: CALL CSTAT LD HL,0 OR A ;CHR TYPED? JR Z,PQTE1 ;NO INC L ;YES, (S1)<--TRUE PQTE1: JHPUSH ; PKEY: CALL CIN ;READ CHR FROM CONSOLE CP DLE ;^P? LD E,A JR NZ,PKEY1 ;NO LD HL,EPRINT LD E,ABL ;(E)<--BLANK LD A,(HL) XOR 01H ;TOGGLE (EPRINT) LSB LD (HL),A PKEY1: LD L,E LD H,0 JHPUSH ;(S1)LB<--CHR ; PEMIT: DEFW $+2 ;(EMIT) orphan POP DE ;(E)<--(S1)LB = CHR LD A,E CP BSOUT JR NZ,PEMIT1 CALL COUT ;backspace LD E,ABL ;blank CALL COUT ;erase CHR on CON: LD E,BSOUT ;backspace PEMIT1: CALL CPOUT ;send CHR to CON: ;and LST: if (EPRINT)=01H JNEXT ; PCR: LD E,ACR CALL CPOUT ;output CR LD E,LF CALL CPOUT ;and LF JNEXT ; ; ;
file: /Techref/language/FORTH/z80fig-Forth1_1g_files/CONPRTIO.ASM, 2KB, , updated: 1997/12/31 09:21, local time: 2024/8/31 17:15,
3.137.170.228:LOG IN
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