mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-26 13:49:18 +00:00
144 lines
2.4 KiB
Plaintext
144 lines
2.4 KiB
Plaintext
PR#3
|
||
PREFIX /A2OSX.SRC
|
||
LOMEM $A00
|
||
INC 1
|
||
AUTO 6
|
||
*--------------------------------------
|
||
PullPtr1Ptr2Ptr3
|
||
sec
|
||
.HS 90 bcc
|
||
PullPtr1Ptr2 clc
|
||
>PULLW ZPPtr1
|
||
>PULLW ZPPtr2
|
||
bcc .9
|
||
>PULLW ZPPtr3
|
||
.9 rts
|
||
*--------------------------------------
|
||
* Convert HEXBUF to ASCBUF decimal padded with 0
|
||
*--------------------------------------
|
||
HEX2DEC ldx #4
|
||
|
||
.1 stz BCDBUF,x Clear all 5 bytes
|
||
dex
|
||
bpl .1
|
||
|
||
sed switch to BCD mode
|
||
|
||
ldx #32 let's roll 32 bits
|
||
|
||
.2 jsr HEXBUF.ROL
|
||
|
||
ldy #4
|
||
|
||
.3 lda BCDBUF,y
|
||
adc BCDBUF,y
|
||
sta BCDBUF,y
|
||
dey
|
||
bpl .3
|
||
|
||
dex
|
||
bne .2
|
||
|
||
cld
|
||
|
||
ldy #4
|
||
ldx #9
|
||
|
||
.4 lda BCDBUF,y
|
||
pha
|
||
and #$0F
|
||
ora #$30
|
||
sta ASCBUF,x
|
||
dex
|
||
pla
|
||
lsr
|
||
lsr
|
||
lsr
|
||
lsr
|
||
ora #$30
|
||
sta ASCBUF,x
|
||
dey
|
||
dex
|
||
bpl .4
|
||
|
||
rts
|
||
*--------------------------------------
|
||
* Convert ASCBUF decimal to HEXBUF
|
||
*--------------------------------------
|
||
DEC2HEX stz HEXBUF
|
||
stz HEXBUF+1
|
||
stz HEXBUF+2
|
||
stz HEXBUF+3
|
||
|
||
ldx #0
|
||
|
||
.1 lda HEXBUF+3 save HEXBUF for 4+1
|
||
pha
|
||
lda HEXBUF+2
|
||
pha
|
||
lda HEXBUF+1
|
||
pha
|
||
lda HEXBUF
|
||
pha
|
||
|
||
jsr HEXBUF.ROL HEXBUF * 2 -> HEXBUF
|
||
* bcs .9 overflow!!!
|
||
|
||
jsr HEXBUF.ROL HEXBUF * 4 -> HEXBUF
|
||
* bcs .9 overflow!!!
|
||
|
||
pla HEXBUF * 4 + HEXBUF -> HEXBUF
|
||
adc HEXBUF
|
||
sta HEXBUF
|
||
pla
|
||
adc HEXBUF+1
|
||
sta HEXBUF+1
|
||
pla
|
||
adc HEXBUF+2
|
||
sta HEXBUF+2
|
||
pla
|
||
adc HEXBUF+3
|
||
sta HEXBUF+3
|
||
* bcs .99 overflow!!!
|
||
|
||
jsr HEXBUF.ROL HEXBUF * 10 -> HEXBUF
|
||
* bcs .99 overflow!!!
|
||
|
||
inx
|
||
lda ASCBUF,x
|
||
and #$0F
|
||
|
||
adc HEXBUF
|
||
sta HEXBUF
|
||
bcc .2
|
||
inc HEXBUF+1
|
||
bne .2
|
||
inc HEXBUF+2
|
||
bne .2
|
||
inc HEXBUF+3
|
||
|
||
.2 cpx ASCBUF
|
||
bne .1
|
||
rts
|
||
|
||
*.9 pla discard saved HEXBUF
|
||
* pla
|
||
* pla
|
||
* pla
|
||
*.99 rts
|
||
*--------------------------------------
|
||
HEXBUF.ROL asl HEXBUF
|
||
rol HEXBUF+1
|
||
rol HEXBUF+2
|
||
rol HEXBUF+3
|
||
rts
|
||
*--------------------------------------
|
||
HEXBUF .BS 4 32 bits max
|
||
BCDBUF .BS 5 5, enough to handle 10 digits (32bits)
|
||
ASCBUF .BS 12 LEN + sign + 10 digits ($FFFFFFFF=4.294.967.295)
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE SYS/KERNEL.S.CNV
|
||
LOAD SYS/KERNEL.S
|
||
ASM
|