2016-10-29 19:58:21 +00:00
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PR#3
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PREFIX /A2OSX.SRC
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2017-03-15 16:44:15 +00:00
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LOMEM $A00
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2016-10-29 19:58:21 +00:00
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INC 1
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AUTO 6
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2017-03-15 16:44:15 +00:00
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*--------------------------------------
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PullPtr1Ptr2Ptr3
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sec
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.HS 90 bcc
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PullPtr1Ptr2 clc
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>PULLW ZPPtr1
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>PULLW ZPPtr2
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bcc .9
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>PULLW ZPPtr3
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.9 rts
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2016-10-29 19:58:21 +00:00
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*--------------------------------------
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* Convert HEXBUF to ASCBUF decimal padded with 0
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*--------------------------------------
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HEX2DEC ldx #4
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.1 stz BCDBUF,x Clear all 5 bytes
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dex
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bpl .1
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sed switch to BCD mode
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ldx #32 let's roll 32 bits
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2017-01-12 17:43:45 +00:00
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.2 jsr HEXBUF.ROL
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2016-10-29 19:58:21 +00:00
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ldy #4
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.3 lda BCDBUF,y
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adc BCDBUF,y
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sta BCDBUF,y
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dey
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bpl .3
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dex
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bne .2
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cld
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ldy #4
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ldx #9
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.4 lda BCDBUF,y
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pha
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and #$0F
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ora #$30
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sta ASCBUF,x
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dex
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pla
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lsr
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lsr
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lsr
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lsr
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ora #$30
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sta ASCBUF,x
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dey
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dex
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bpl .4
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rts
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*--------------------------------------
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* Convert ASCBUF decimal to HEXBUF
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*--------------------------------------
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DEC2HEX stz HEXBUF
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stz HEXBUF+1
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stz HEXBUF+2
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stz HEXBUF+3
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ldx #0
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.1 lda HEXBUF+3 save HEXBUF for 4+1
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pha
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lda HEXBUF+2
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pha
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lda HEXBUF+1
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pha
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lda HEXBUF
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pha
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2017-01-12 17:43:45 +00:00
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jsr HEXBUF.ROL HEXBUF * 2 -> HEXBUF
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2016-10-29 19:58:21 +00:00
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* bcs .9 overflow!!!
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2017-01-12 17:43:45 +00:00
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jsr HEXBUF.ROL HEXBUF * 4 -> HEXBUF
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2016-10-29 19:58:21 +00:00
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* bcs .9 overflow!!!
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2017-01-12 17:43:45 +00:00
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pla HEXBUF * 4 + HEXBUF -> HEXBUF
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2016-10-29 19:58:21 +00:00
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adc HEXBUF
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sta HEXBUF
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pla
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adc HEXBUF+1
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sta HEXBUF+1
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pla
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adc HEXBUF+2
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sta HEXBUF+2
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pla
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adc HEXBUF+3
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sta HEXBUF+3
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* bcs .99 overflow!!!
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2017-01-12 17:43:45 +00:00
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jsr HEXBUF.ROL HEXBUF * 10 -> HEXBUF
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2016-10-29 19:58:21 +00:00
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* bcs .99 overflow!!!
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inx
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lda ASCBUF,x
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and #$0F
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adc HEXBUF
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sta HEXBUF
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bcc .2
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inc HEXBUF+1
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bne .2
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inc HEXBUF+2
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bne .2
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inc HEXBUF+3
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.2 cpx ASCBUF
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bne .1
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rts
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*.9 pla discard saved HEXBUF
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* pla
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* pla
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* pla
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*.99 rts
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*--------------------------------------
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2017-01-12 17:43:45 +00:00
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HEXBUF.ROL asl HEXBUF
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rol HEXBUF+1
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rol HEXBUF+2
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rol HEXBUF+3
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rts
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*--------------------------------------
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2016-10-29 19:58:21 +00:00
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HEXBUF .BS 4 32 bits max
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BCDBUF .BS 5 5, enough to handle 10 digits (32bits)
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ASCBUF .BS 12 LEN + sign + 10 digits ($FFFFFFFF=4.294.967.295)
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*--------------------------------------
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MAN
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SAVE SYS/KERNEL.S.CNV
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LOAD SYS/KERNEL.S
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ASM
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