brooke/mandel-6502
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hmm

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Brooke Vibber 2023-01-22 08:34:06 -08:00
parent 2e5f91a0db
commit a8872b4e66
1 changed files with 14 additions and 11 deletions
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25
mandel.s
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@ -567,10 +567,10 @@ point:
shl16 temp
shl16 temp
shl16 temp
add16 pixel_ptr, temp, temp
add16 pixel_ptr, pixel_ptr, temp
shl16 temp
shl16 temp
add16 pixel_ptr, temp, temp
add16 pixel_ptr, pixel_ptr, temp
; Ok so temp1 points to the start of the line, which is 40 bytes.
; Get the byte and bit offsets
@ -605,6 +605,7 @@ shift_done:
lda (temp),y
and pixel_mask
ora pixel_color
lda #255
sta (temp),y
rts
@ -701,7 +702,9 @@ loop_sy:
loop_sx:
zoom_factor cx, sx, zoom, aspect_x
zoom_factor cy, sy, zoom, aspect_y
jsr mandelbrot
;jsr mandelbrot
lda #1
sta iter
jsr pset
@ -709,13 +712,13 @@ loop_sx:
clc
adc #1
sta sx
cmp #half_width
beq loop_sx_done
lda sx + 1
adc #0
sta sx + 1
lda sx
cmp #half_width
beq loop_sx_done
jmp loop_sx
loop_sx_done:
@ -724,13 +727,13 @@ loop_sx_done:
clc
adc #1
sta sy
cmp #half_height
beq loop_sy_done
lda sy + 1
adc #0
sta sy + 1
lda sy
cmp #half_height
beq loop_sy_done
jmp loop_sy
loop_sy_done: