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Made long address unsigned.

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This commit is contained in:
jespergravgaard 2021-04-02 11:11:25 +02:00
parent 663f134b0f
commit 2c6947a600
5 changed files with 83 additions and 7 deletions
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19
src/main/fragment/mos6502-common/vdum1=vduc1_plus_vwsm2.asm Normal file
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@ -0,0 +1,19 @@
lda {m2}+1
ora #$7f
bmi !+
lda #0
!:
sta $ff
clc
lda {m2}
adc #<{c1}
sta {m1}
lda {m2}+1
adc #>{c1}
sta {m1}+1
lda $ff
adc #<{c1}>>$10
sta {m1}+2
lda $ff
adc #>{c1}>>$10
sta {m1}+3

19
src/main/fragment/mos6502-common/vdum1=vdum1_plus_vwsm2.asm Normal file
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@ -0,0 +1,19 @@
lda {m2}+1
ora #$7f
bmi !+
lda #0
!:
sta $ff
clc
lda {m1}
adc {m2}
sta {m1}
lda {m1}+1
adc {m2}+1
sta {m1}+1
lda {m1}+2
adc $ff
sta {m1}+2
lda {m1}+3
adc $ff
sta {m1}+3

19
src/main/fragment/mos6502-common/vdum1=vdum2_plus_vbsaa.asm Normal file
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@ -0,0 +1,19 @@
pha
ora #$7f
bmi !+
lda #0
!:
sta $ff
pla
clc
adc {m2}
sta {m1}
lda $ff
adc {m2}+1
sta {m1}+1
lda $ff
adc {m2}+2
sta {m1}+2
lda $ff
adc {m2}+3
sta {m1}+3

19
src/main/fragment/mos6502-common/vdum1=vdum2_plus_vwsm3.asm Normal file
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@ -0,0 +1,19 @@
lda {m3}+1
ora #$7f
bmi !+
lda #0
!:
sta $ff
clc
lda {m2}
adc {m3}
sta {m1}
lda {m2}+1
adc {m3}+1
sta {m1}+1
lda {m2}+2
adc $ff
sta {m1}+2
lda {m2}+3
adc $ff
sta {m1}+3

14
src/test/kc/examples/mega65/linedrawing.c
View File

@ -143,13 +143,13 @@ void graphics_mode(void) {
}
void draw_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2, unsigned char colour) {
void draw_line(int x1, int y1, int x2, int y2, unsigned char colour) {
// Ignore if we choose to draw a point
if (x2 == x1 && y2 == y1)
return;
int dx = (int)x2 - (int)x1;
int dy = (int)y2 - (int)y1;
int dx = x2 - x1;
int dy = y2 - y1;
if (dx < 0)
dx = -dx;
if (dy < 0)
@ -160,7 +160,7 @@ void draw_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y
// Y is major axis
if (y2 < y1) {
unsigned int temp = x1;
int temp = x1;
x1 = x2;
x2 = temp;
temp = y1;
@ -182,7 +182,7 @@ void draw_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y
// Slope is the most significant bytes of the fractional part
// of the division result
unsigned int slope = (unsigned int )*MATH_DIVOUT_FRAC_INT1;
int slope = *MATH_DIVOUT_FRAC_INT1;
// Put slope into DMA options
line_dma_command[LINE_DMA_COMMAND_SLOPE_OFFSET] = LOBYTE(slope);
@ -215,7 +215,7 @@ void draw_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y
// X is major axis
if (x2 < x1) {
unsigned int temp = x1;
int temp = x1;
x1 = x2;
x2 = temp;
temp = y1;
@ -236,7 +236,7 @@ void draw_line(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y
VICIV->BORDER_COLOR = 0;
// Slope is the most significant bytes of the fractional part of the division result
unsigned int slope = (unsigned int)*MATH_DIVOUT_FRAC_INT1;
int slope = *MATH_DIVOUT_FRAC_INT1;
// Put slope into DMA options
line_dma_command[LINE_DMA_COMMAND_SLOPE_OFFSET] = LOBYTE(slope);