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Brooke Vibber 2024-12-31 07:20:53 -08:00
parent 61eb1aaf21
commit 0d086a179c
1 changed files with 68 additions and 40 deletions
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108
mandel.s
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@ -1,43 +1,42 @@
; Our zero-page vars ; Our zero-page vars
sx = $80 ; i16: screen pixel x ox = $80 ; fixed8.24: center point x
sy = $82 ; i16: screen pixel y oy = $84 ; fixed8.24: center point y
ox = $84 ; fixed4.12: center point x cx = $88 ; fixed8.24: c_x
oy = $86 ; fixed4.12: center point y cy = $8c ; fixed8.24: c_y
cx = $88 ; fixed4.12: c_x
cy = $8a ; fixed4.12: c_y
zx = $8c ; fixed4.12: z_x
zy = $8e ; fixed4.12: z_y
zx_2 = $90 ; fixed4.12: z_x^2 zx = $90 ; fixed8.24: z_x
zy_2 = $92 ; fixed4.12: z_y^2 zy = $94 ; fixed8.24: z_y
zx_zy = $94 ; fixed4.12: z_x * z_y zx_2 = $98 ; fixed8.24: z_x^2
dist = $96 ; fixed4.12: z_x^2 + z_y^2 zy_2 = $9c ; fixed8.24: z_y^2
iter = $a0 ; u8: iteration count zx_zy = $a0 ; fixed8.24: z_x * z_y
dist = $a4 ; fixed8.24: z_x^2 + z_y^2
sx = $a8 ; i16: screen pixel x
sy = $aa ; i16: screen pixel y
z_buffer_active = $ac ; boolean: 1 if we triggered the lake, 0 if not
z_buffer_start = $ad ; u8: index into z_buffer
z_buffer_end = $ae ; u8: index into z_buffer
iter = $af ; u8: iteration count
zoom = $a1 ; u8: zoom shift level ptr = $b0 ; u16
count_frames = $a2 ; u8 pixel_ptr = $b2 ; u16
count_pixels = $a3 ; u8 zoom = $b4 ; u8: zoom shift level
total_ms = $a4 ; float48 fill_level = $b5 ; u8
total_pixels = $aa ; float48 pixel_color = $b6 ; u8
pixel_mask = $b7 ; u8
pixel_shift = $b8 ; u8
pixel_offset = $b9 ; u8
palette_offset = $ba ; u8
chroma_offset = $bb ; u8
palette_ticks = $bc ; u8
chroma_ticks = $bd ; u8
count_frames = $be ; u8
count_pixels = $bf ; u8
z_buffer_active = $b0 ; boolean: 1 if we triggered the lake, 0 if not total_pixels = $c0 ; float48
z_buffer_start = $b1 ; u8: index into z_buffer total_ms = $c6 ; float48
z_buffer_end = $b2 ; u8: index into z_buffer temp = $cc ; u16
temp = $b4 ; u16 temp2 = $ce ; u16
temp2 = $b6 ; u16
pixel_ptr = $b8 ; u16
pixel_color = $ba ; u8
pixel_mask = $bb ; u8
pixel_shift = $bc ; u8
pixel_offset = $bd ; u8
fill_level = $be ; u8
palette_offset = $bf ; u8
palette_ticks = $c0 ; u8
chroma_ticks = $c1 ; u8
chroma_offset = $c2 ; u8
ptr = $c4 ; u16
palette_delay = 23 palette_delay = 23
chroma_delay = 137 chroma_delay = 137
@ -884,12 +883,41 @@ next:
; zx_zy = 0 ; zx_zy = 0
; dist = 0 ; dist = 0
; iter = 0 ; iter = 0
; lda #00
; ldx #(iter - zx + 1)
;initloop:
; sta zx - 1,x
; dex
; bne initloop
; sta z_buffer_start
; sta z_buffer_end
lda #00 lda #00
ldx #(iter - zx + 1) sta zx
initloop: sta zx + 1
sta zx - 1,x sta zx + 2
dex sta zx + 3
bne initloop sta zy
sta zy + 1
sta zy + 2
sta zy + 3
sta zx_2
sta zx_2 + 1
sta zx_2 + 2
sta zx_2 + 3
sta zy_2
sta zy_2 + 1
sta zy_2 + 2
sta zy_2 + 3
sta zx_zy
sta zx_zy + 1
sta zx_zy + 2
sta zx_zy + 3
sta dist
sta dist + 1
sta dist + 2
sta dist + 3
sta iter
sta z_buffer_start sta z_buffer_start
sta z_buffer_end sta z_buffer_end