302 lines
7.5 KiB
ArmAsm
302 lines
7.5 KiB
ArmAsm
.segment "CODE"
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; ----------------------------------------------------------------------------
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; INPUT CONVERSION ERROR: ILLEGAL CHARACTER
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; IN NUMERIC FIELD. MUST DISTINGUISH
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; BETWEEN INPUT, READ, AND GET
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; ----------------------------------------------------------------------------
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INPUTERR:
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lda INPUTFLG
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beq RESPERR ; INPUT
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; without this, it treats GET errors
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; like READ errors
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bmi L2A63 ; READ
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ldy #$FF ; GET
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bne L2A67
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L2A63:
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lda Z8C
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ldy Z8C+1
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L2A67:
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sta CURLIN
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sty CURLIN+1
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SYNERR4:
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jmp SYNERR
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RESPERR:
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lda CURDVC
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beq LCA8F
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ldx #ERR_BADDATA
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jmp ERROR
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LCA8F:
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lda #<ERRREENTRY
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ldy #>ERRREENTRY
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jsr STROUT
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lda OLDTEXT
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ldy OLDTEXT+1
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sta TXTPTR
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sty TXTPTR+1
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RTS20:
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rts
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; ----------------------------------------------------------------------------
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; "GET" STATEMENT
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; ----------------------------------------------------------------------------
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GET:
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jsr ERRDIR
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; CBM: if GET#, then switch input
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cmp #'#'
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bne LCAB6
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jsr CHRGET
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jsr GETBYT
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lda #','
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jsr SYNCHR
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jsr CHKIN
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stx CURDVC
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LCAB6:
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ldx #<(INPUTBUFFER+1)
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ldy #>(INPUTBUFFER+1)
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lda #$00
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sta INPUTBUFFER+1
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lda #$40
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jsr PROCESS_INPUT_LIST
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; CBM: if GET#, then switch input back
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ldx CURDVC
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bne LCAD8
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rts
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; ----------------------------------------------------------------------------
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; "INPUT#" STATEMENT
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; ----------------------------------------------------------------------------
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INPUTH:
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jsr GETBYT
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lda #$2C
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jsr SYNCHR
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jsr CHKIN
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stx CURDVC
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jsr L2A9E
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LCAD6:
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lda CURDVC
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LCAD8:
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jsr CLRCH
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ldx #$00
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stx CURDVC
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rts
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LCAE0:
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; ----------------------------------------------------------------------------
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; "INPUT" STATEMENT
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; ----------------------------------------------------------------------------
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INPUT:
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lsr Z14
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cmp #$22
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bne L2A9E
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jsr STRTXT
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lda #$3B
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jsr SYNCHR
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jsr STRPRT
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L2A9E:
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jsr ERRDIR
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lda #$2C
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sta INPUTBUFFER-1
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LCAF8:
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jsr NXIN
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lda CURDVC
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beq LCB0C
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lda IO_FILE_STATUS
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and #FILE_STATUS_EOF
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beq LCB0C
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jsr LCAD6
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jmp DATA
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LCB0C:
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lda INPUTBUFFER
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bne L2ABE
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lda CURDVC
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bne LCAF8
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clc
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jmp CONTROL_C_TYPED
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NXIN:
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lda CURDVC
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bne LCB21
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jsr OUTQUES ; '?'
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jsr OUTSP
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LCB21:
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jmp INLIN
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; ----------------------------------------------------------------------------
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; "READ" STATEMENT
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; ----------------------------------------------------------------------------
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READ:
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ldx DATPTR
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ldy DATPTR+1
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; AppleSoft II, too
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lda #$98 ; READ
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.byte $2C
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L2ABE:
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lda #$00 ; INPUT
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; ----------------------------------------------------------------------------
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; PROCESS INPUT LIST
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;
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; (Y,X) IS ADDRESS OF INPUT DATA STRING
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; (A) = VALUE FOR INPUTFLG: $00 FOR INPUT
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; $40 FOR GET
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; $98 FOR READ
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; ----------------------------------------------------------------------------
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PROCESS_INPUT_LIST:
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sta INPUTFLG
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stx INPTR
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sty INPTR+1
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PROCESS_INPUT_ITEM:
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jsr PTRGET
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sta FORPNT
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sty FORPNT+1
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lda TXTPTR
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ldy TXTPTR+1
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sta TXPSV
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sty TXPSV+1
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ldx INPTR
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ldy INPTR+1
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stx TXTPTR
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sty TXTPTR+1
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jsr CHRGOT
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bne INSTART
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bit INPUTFLG
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bvc L2AF0
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jsr MONRDKEY
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sta INPUTBUFFER
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; BUG: The beq/bne L2AF8 below is supposed
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; to be always taken. For this to happen,
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; the last load must be a 0 for beq
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; and != 0 for bne. The original Microsoft
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; code had ldx/ldy/bne here, which was only
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; correct for a non-ZP INPUTBUFFER. Commodore
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; fixed it in CBMBASIC V1 by swapping the
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; ldx and the ldy. It was broken on KIM,
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; but okay on APPLE and CBM2, because
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; these used a non-ZP INPUTBUFFER.
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; Microsoft fixed this somewhere after KIM
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; and before MICROTAN, by using beq instead
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; of bne in the ZP case.
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ldx #<(INPUTBUFFER-1)
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ldy #>(INPUTBUFFER-1)
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bne L2AF8 ; always
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L2AF0:
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bmi FINDATA
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lda CURDVC
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bne LCB64
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jsr OUTQUES
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LCB64:
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jsr NXIN
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L2AF8:
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stx TXTPTR
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sty TXTPTR+1
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; ----------------------------------------------------------------------------
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INSTART:
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jsr CHRGET
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bit VALTYP
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bpl L2B34
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bit INPUTFLG
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bvc L2B10
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inx
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stx TXTPTR
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lda #$00
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sta CHARAC
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beq L2B1C
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L2B10:
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sta CHARAC
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cmp #$22
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beq L2B1D
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lda #$3A
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sta CHARAC
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lda #$2C
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L2B1C:
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clc
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L2B1D:
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sta ENDCHR
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lda TXTPTR
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ldy TXTPTR+1
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adc #$00
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bcc L2B28
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iny
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L2B28:
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jsr STRLT2
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jsr POINT
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jsr PUTSTR
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jmp INPUT_MORE
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; ----------------------------------------------------------------------------
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L2B34:
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jsr FIN
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lda VALTYP+1
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jsr LET2
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; ----------------------------------------------------------------------------
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INPUT_MORE:
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jsr CHRGOT
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beq L2B48
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cmp #$2C
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beq L2B48
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jmp INPUTERR
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L2B48:
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lda TXTPTR
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ldy TXTPTR+1
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sta INPTR
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sty INPTR+1
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lda TXPSV
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ldy TXPSV+1
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sta TXTPTR
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sty TXTPTR+1
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jsr CHRGOT
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beq INPDONE
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jsr CHKCOM
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jmp PROCESS_INPUT_ITEM
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; ----------------------------------------------------------------------------
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FINDATA:
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jsr DATAN
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iny
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tax
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bne L2B7C
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ldx #ERR_NODATA
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iny
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lda (TXTPTR),y
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beq GERR
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iny
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lda (TXTPTR),y
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sta Z8C
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iny
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lda (TXTPTR),y
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iny
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sta Z8C+1
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L2B7C:
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lda (TXTPTR),y
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tax
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jsr ADDON
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cpx #$83
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bne FINDATA
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jmp INSTART
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; ---NO MORE INPUT REQUESTED------
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INPDONE:
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lda INPTR
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ldy INPTR+1
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ldx INPUTFLG
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bpl L2B94; INPUT or GET
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jmp SETDA
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L2B94:
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ldy #$00
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lda (INPTR),y
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beq L2BA1
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lda CURDVC
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bne L2BA1
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lda #<ERREXTRA
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ldy #>ERREXTRA
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jmp STROUT
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L2BA1:
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rts
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; ----------------------------------------------------------------------------
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ERREXTRA:
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.byte "?EXTRA IGNORED"
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.byte LF,$00
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ERRREENTRY:
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.byte "?REDO FROM START"
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.byte LF,$00
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