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235 lines
5.6 KiB
NASM
235 lines
5.6 KiB
NASM
mcopy objout.macros
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****************************************************************
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*
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* CnOut - write a byte to the constant buffer
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*
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* Inputs:
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* i - byte to write
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*
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****************************************************************
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*
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CnOut start
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maxCBuffLen equ 191 max index into the constant buffer
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lda cBuffLen if cBuffLen = maxCBuffLen then
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cmp #maxCBuffLen
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bne lb1
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jsl Purge Purge;
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lb1 phb cBuff[cBuffLen] := i;
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plx
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ply
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pla
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phy
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phx
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plb
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ldx cBuffLen
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short M
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sta cBuff,X
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long M
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inc cBuffLen cBuffLen := cBuffLen+1;
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rtl
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end
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****************************************************************
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*
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* CnOut2 - write a word to the constant buffer
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*
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* Inputs:
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* i - word to write
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*
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****************************************************************
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*
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CnOut2 start
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maxCBuffLen equ 191 max index into the constant buffer
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lda cBuffLen if cBuffLen+1 >= maxCBuffLen then
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inc A
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cmp #maxCBuffLen
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blt lb1
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jsl Purge Purge;
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lb1 phb cBuff[cBuffLen] := i;
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plx
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ply
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pla
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phy
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phx
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plb
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ldx cBuffLen
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sta cBuff,X
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inx cBuffLen := cBuffLen+2;
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inx
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stx cBuffLen
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rtl
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end
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****************************************************************
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*
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* COut - write a code byte to the object file
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*
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* Inputs:
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* b - byte to write (on stack)
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*
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****************************************************************
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*
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COut start
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phb OutByte(b);
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pla
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ply
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plx
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phy
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pha
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plb
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jsr OutByte
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inc blkcnt blkcnt := blkcnt+1;
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inc4 pc pc := pc+1;
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rtl
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end
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****************************************************************
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*
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* Out2 - write a word to the output file
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*
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* Inputs:
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* w - word to write (on stack)
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*
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****************************************************************
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*
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Out2 start
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phb OutWord(w);
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pla
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ply
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plx
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phy
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pha
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plb
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jsr OutWord
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inc blkcnt blkcnt := blkcnt+2;
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inc blkcnt
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rtl
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end
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****************************************************************
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*
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* Out - write a byte to the output file
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*
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* Inputs:
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* b - byte to write (on stack)
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*
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****************************************************************
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*
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Out start
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phb OutByte(b);
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pla
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ply
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plx
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phy
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pha
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plb
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jsr OutByte
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inc blkcnt blkcnt := blkcnt+1;
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rtl
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end
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****************************************************************
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*
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* OutByte - write a byte to the object file
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*
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* Inputs:
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* X - byte to write
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*
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****************************************************************
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*
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OutByte private
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buffSize equ 16384 buffer size
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lda objLen if objLen+segDisp+1 = buffSize then
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sec
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adc segDisp
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cmp #buffSize
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blt lb2
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phx PurgeObjBuffer;
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jsl PurgeObjBuffer
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plx
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lda objLen check for segment overflow
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sec
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adc segDisp
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cmp #buffSize
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bge lb2a
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lb2 ph4 objPtr p := pointer(ord4(objPtr)+segDisp);
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tsc p^ := b;
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phd
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tcd
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ldy segDisp
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short M
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txa
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sta [1],Y
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long M
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inc segDisp segDisp := segDisp+1;
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pld
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tsc
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clc
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adc #4
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tcs
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rts
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lb2a lda #$1000 handle a segment buffer overflow
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sta segDisp
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ph2 #112
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jsl Error
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rts
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end
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****************************************************************
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*
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* OutWord - write a word to the object file
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*
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* Inputs:
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* X - word to write
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*
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****************************************************************
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*
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OutWord private
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buffSize equ 16384 buffer size
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lda objLen if objLen+segDisp+2 = buffSize then
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sec
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adc segDisp
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cmp #buffSize-1
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blt lb2
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phx PurgeObjBuffer;
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jsl PurgeObjBuffer
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plx
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lda objLen check for segment overflow
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sec
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adc segDisp
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cmp #buffSize-1
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bge lb3
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lb2 ph4 objPtr p := pointer(ord4(objPtr)+segDisp);
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tsc p^ := b;
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phd
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tcd
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ldy segDisp
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txa
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sta [1],Y
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iny segDisp := segDisp+2;
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iny
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sty segDisp
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pld
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tsc
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clc
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adc #4
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tcs
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rts
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lb3 ph2 #112 flag segment overflow error
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jsl Error
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lda #$1000
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sta segDisp
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rts
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end
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