mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-09-29 03:56:15 +00:00
48 lines
1.0 KiB
NASM
48 lines
1.0 KiB
NASM
// Test array index pointer rewriting
|
|
// struct array with 8bit index
|
|
// Commodore 64 PRG executable file
|
|
.file [name="index-pointer-rewrite-8.prg", type="prg", segments="Program"]
|
|
.segmentdef Program [segments="Basic, Code, Data"]
|
|
.segmentdef Basic [start=$0801]
|
|
.segmentdef Code [start=$80d]
|
|
.segmentdef Data [startAfter="Code"]
|
|
.segment Basic
|
|
:BasicUpstart(main)
|
|
.const OFFSET_STRUCT_BALL_VEL = 1
|
|
.const OFFSET_STRUCT_BALL_SYM = 2
|
|
.segment Code
|
|
main: {
|
|
ldy #0
|
|
__b1:
|
|
// for(char i=0;i<NUM_BALLS;i++)
|
|
cpy #$19
|
|
bcc __b2
|
|
// }
|
|
rts
|
|
__b2:
|
|
// balls[i].pos += balls[i].vel
|
|
tya
|
|
asl
|
|
sty.z $ff
|
|
clc
|
|
adc.z $ff
|
|
tax
|
|
lda balls,x
|
|
clc
|
|
adc balls+OFFSET_STRUCT_BALL_VEL,x
|
|
sta balls,x
|
|
// balls[i].vel += 10
|
|
lda #$a
|
|
clc
|
|
adc balls+OFFSET_STRUCT_BALL_VEL,x
|
|
sta balls+OFFSET_STRUCT_BALL_VEL,x
|
|
// balls[i].sym ='*'
|
|
lda #'*'
|
|
sta balls+OFFSET_STRUCT_BALL_SYM,x
|
|
// for(char i=0;i<NUM_BALLS;i++)
|
|
iny
|
|
jmp __b1
|
|
}
|
|
.segment Data
|
|
balls: .fill 3*$19, 0
|