Merged JGH's auxmem.bytwrd.s improvements.
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applecorn.po
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applecorn.po
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auxmem.bytwrd.s
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auxmem.bytwrd.s
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@ -1,5 +1,14 @@
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* AUXMEM.BYTWRD.S
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* (c) Bobbi 2021 GPLv3
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*
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* Applecorn OSBYTE and OSWORD handlers
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* KERNEL/OSWOSB.S
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*****************
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* OSBYTE and OSWORD dispatch
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*
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* 15-Aug-2021 Added 'set variable' OSBYTEs 1-6
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XC ; 65c02
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@ -7,11 +16,15 @@
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* OSBYTE DISPATCH TABLE *
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*************************
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BYTEVARBASE EQU $190 ; Base of OSBYTE variables
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BYTWRDADDR DW BYTE00 ; OSBYTE 0 - Machine host
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DW BYTE01 ; OSBYTE 1 - User flag
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DW BYTE02 ; OSBYTE 2 - OSRDCH source
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DW BYTE03 ; OSBYTE 3 - OSWRCH dest
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* DW BYTE04 ; OSBYTE 4 - Cursor keys
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DW BYTE04 ; OSBYTE 4 - Cursor keys
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DW BYTE05 ; OSBYTE 5 - Printer destination
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DW BYTE06 ; OSBYTE 6 - Printer ignore
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BYTWRDLOW
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BYTESZLO EQU BYTWRDLOW-BYTWRDADDR
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BYTELOW EQU BYTESZLO/2-1 ; Maximum low OSBYTE
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@ -20,22 +33,22 @@ BYTEHIGH EQU $7C ; First high OSBYTE
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DW BYTE7D ; OSBYTE 125 - Set Escape
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DW BYTE7E ; OSBYTE 126 - Ack. Escape
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DW BYTE7F ; OSBYTE 127 - Read EOF
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DW BYTE80 ; OSBYTE 128 - ADVAL
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DW BYTE81 ; OSBYTE 129 - INKEY
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DW BYTE80 ; OSBYTE 128 - ADVAL - MISC.s
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DW BYTE81 ; OSBYTE 129 - INKEY - CHARIO.s
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DW BYTE82 ; OSBYTE 130 - Memory high word
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DW BYTE83 ; OSBYTE 131 - MEMBOT
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DW BYTE84 ; OSBYTE 132 - MEMTOP
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DW BYTE85 ; OSBYTE 133 - MEMTOP for MODE
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DW BYTE86 ; OSBYTE 134 - POS, VPOS
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DW BYTE87 ; OSBYTE 135 - Character, MODE
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DW BYTE86 ; OSBYTE 134 - POS, VPOS - VDU.s
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DW BYTE87 ; OSBYTE 135 - Character, MODE - VDU.s
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DW BYTE88 ; OSBYTE 136 - *CODE
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DW BYTE89 ; OSBYTE 137 - *MOTOR
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DW BYTE8A ; OSBYTE 138 - Buffer insert
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DW BYTE8B ; OSBYTE 139 - *OPT
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DW BYTE8C ; OSBYTE 140 - *TAPE
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DW BYTE8D ; OSBYTE 141 - *ROM
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DW BYTE8E ; OSBYTE 142 - Enter language
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DW BYTE8F ; OSBYTE 143 - Service call
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DW BYTE8E ; OSBYTE 142 - Enter language - INIT.s
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DW BYTE8F ; OSBYTE 143 - Service call - INIT.s
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BYTWRDTOP
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DW BYTEVAR ; OSBYTE 166+ - Read/Write OSBYTE variable
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* Maximum high OSBYTE
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@ -189,7 +202,6 @@ JMPADDR JMP ($00FA)
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* On exit, Y=length of line, offset to <cr>
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* CC = Ok, CS = Escape
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*
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XC ; 65c02
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WORD00 IF MAXLEN-OSTEXT-2
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LDY #$04
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@ -204,9 +216,9 @@ WORD00 IF MAXLEN-OSTEXT-2
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BPL :WORD00LP2
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INY ; Initial line length = zero
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ELSE
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LDA (OSCTRL),Y ; Copy control block
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LDA (OSCTRL),Y ; Copy control block
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STA OSTEXT,Y ; 0,1 => text
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INY ; 2 = MAXLEN
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INY ; 2 = MAXLEN
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CPY #$05 ; 3 = MINCHAR
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BCC WORD00 ; 4 = MAXCHAR
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LDY #$00 ; Initial line length = zero
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@ -288,16 +300,12 @@ WORD02 RTS ; Dummy, do nothing
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XC ; 65c02
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WORD05 JSR GETADDR ; Point to address, set X and Y
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* needs to switch to main memory
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LDA (OSINTWS) ; Get byte
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* needs to switch back
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STA (OSCTRL),Y ; Store it
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RTS
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WORD06 JSR GETADDR ; Point to address, set X and Y
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LDA (OSCTRL),Y ; Get byte
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* needs to switch to main memory
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STA (OSINTWS) ; Store it
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* needs to switch back
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RTS
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GETADDR STA OSINTWS+0 ; (OSINTWS)=>byte to read/write
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INY
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@ -306,78 +314,94 @@ GETADDR STA OSINTWS+0 ; (OSINTWS)=>byte to read/write
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LDY #$04 ; Point Y to data byte
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RTS
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* KERNEL/BWMISC.S
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* OSBYTE routines
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*****************
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* Here until tidied
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BYTE00 LDX #$0A ; $00 = identify Host
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RTS
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BYTE01 LDA #$F1 ; $01 = read/write user flag
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JMP BYTEHND
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BYTE88 LDA #$01 ; $88 = *CODE
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WORDE0 JMP (USERV) ; OSWORD &E0+
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BYTE02 RTS ; $02 = select input stream
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BYTE03 RTS ; $03 = select output stream
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BYTE7C LDA ESCFLAG ; $7C = clear escape condition
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AND #$7F ; Clear MSbit
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STA ESCFLAG
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* Low OSBYTE converted into Set Variable
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BYTE02 LDA #$F7 ; -> &B1
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;
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BYTE09 ; -> &C2
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BYTE0A ; -> &C3
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BYTE0B ; -> &C4
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BYTE0C ADC #$C9 ; -> &C5
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;
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BYTE01 ; -> &F1
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BYTE05 ; -> &F5
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BYTE06 ADC #$07 ; -> &F6
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;
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BYTE03 ; -> &EC
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BYTE04 ADC #$E8 ; -> &ED
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;
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* Read/Write OSBYTE variable
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BYTEVAR TAY ; offset to variable
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LDA BYTEVARBASE+0,Y
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TAX ; X=old value
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AND OSYREG
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EOR OSXREG
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STA BYTEVARBASE+0,Y ; update variable
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LDA BYTEVARBASE+1,Y
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TAY ; Y=next value
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* Unimplemented
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BYTE89 ; *MOTOR
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BYTE8A ; Buffer insert
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BYTE8C ; *TAPE
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BYTE8D ; *ROM
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RTS
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BYTE7D ROR ESCFLAG ; $7D = set escape condition
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RTS
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BYTE7E LDA ESCFLAG ; $7E = ack detection of ESC
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AND #$7F ; Clear MSB
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STA ESCFLAG
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LDX #$FF ; Means ESC condition cleared
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RTS
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BYTE7F PHY ; $7F = check for EOF
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JSR CHKEOF
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PLY
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RTS
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BYTE82 LDY #$FF ; $82 = read high order address
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LDX #$FF ; $FFFF for I/O processor
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* Memory layout
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BYTE82 ; $82 = read high order address
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* LDY #$00
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* LDX #$00 ; $0000 for language processor
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* Should return $0000, but BCPL and Lisp playing silly buggers
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LDY #$FF ; $FFFF for I/O processor
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LDX #$FF
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RTS
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BYTE83 LDY #$0E ; $83 = read bottom of user mem
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LDX #$00 ; $0E00
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RTS
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BYTE85 ; $85 = top user mem for mode
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BYTE84 LDY #$80 ; $84 = read top of user mem
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LDX #$00
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RTS
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BYTE85 LDY #$80 ; $85 = top user mem for mode
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LDX #$00
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RTS
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* Move to keyboard stuff
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************************
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BYTE7E LDX #$00 ; $7E = ack detection of ESC
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BIT ESCFLAG
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BPL BYTE7DOK ; No Escape pending
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* TO DO: process escape effects
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DEX ; X=$FF, Escape was pending
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BYTE7C CLC ; &7C = clear escape condition
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BYTE7D ROR ESCFLAG ; $7D = set escape condition
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BYTE7DOK RTS
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* BYTE86 and BYTE87 are in AUXMEM.VDU.S
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BYTE88 JMP (USERV) ; $88 = *CODE
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BYTE89 RTS ; $89 = *MOTOR
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BYTE8A RTS ; $8A = insert val into buf
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BYTE8B LDA #$00 ; $8B = *OPT
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* Passed on to filing system
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BYTE8B LDA #$00 ; &00 -> &00 - *OPT
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BYTE7F AND #$01 ; &7F -> &01 - EOF
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JMP (FSCV) ; Hand over to filing system
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BYTE8C RTS ; $8C = *TAPE
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BYTE8D RTS ; $8D = *ROM
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* TO DO: Move this to AUXMEM.INIT.S
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***********************************
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* OSBYTE $8E - Enter language ROM
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*
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BYTE8E PHP ; Save CLC=RESET, SEC=Not RESET
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LDA #$08
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LDA #$00
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STA FAULT+0
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LDA #$80
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STA FAULT+1
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JSR PRERR ; Print ROM name with PRERR to set FAULT
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LDY #$09
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JSR PRERRLP ; Print ROM name with PRERR to set
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STY FAULT+0 ; FAULT pointing to version string
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JSR OSNEWL
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JSR OSNEWL
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PLP ; Get entry type back
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@ -386,6 +410,7 @@ BYTE8E PHP ; Save CLC=RESET, SEC=Not RESET
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* OSBYTE $8F - Issue service call
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* X=service call, Y=parameter
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*
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BYTE8F TXA
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SERVICE LDX #$0F
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BIT $8006
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@ -396,11 +421,8 @@ SERVICE LDX #$0F
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:SERVSKIP LDX #$FF
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:SERVDONE RTS
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BYTEDA RTS ; $DA = clear VDU queue
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BYTEEA LDX #$00 ; No tube
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RTS ; $EA = Tube presence
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* Test/Debug code
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UNSUPBYTWRD
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LDA #<OSBYTEM
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LDY #>OSBYTEM
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@ -422,7 +444,3 @@ OSWORDM ASC 'OSWORD($'
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OSBM2 ASC ').'
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DB $00
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BYTEVAR LDX #$00
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LDY #$00
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WORDE0 RTS
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