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called, gets lost

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Brooke Vibber 2024-12-26 18:20:10 -08:00
parent 34ce9da030
commit 45c5a4cb2d
1 changed files with 10 additions and 8 deletions
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18
mandel.s
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@ -433,7 +433,7 @@ fill_masks:
; lookup table for top byte -> PORTB value for bank-switch
;.align 256 ; warning - if not aligned this will cost an extra cycle sometimes
bankswitch:
bank_switch_table:
.repeat 256, i
.byte ((i & $c0) >> 5) | $c1
.endrepeat
@ -460,9 +460,9 @@ bankswitch:
sta ptr + 1 ; 3 cyc
; top 2 bits are the table bank selector
ldx arg2 ; 3 cyc
lda bank_switch,x ; 4 cyc
sta PORTB ; 4 cyc
ldx arg2 ; 3 cyc
lda bank_switch_table,x ; 4 cyc
sta PORTB ; 4 cyc
; copy the entry into output
@ -612,20 +612,20 @@ inner_loop:
; h1*256*(h2*256 + l2) + l1*(h2*256 + l2)
; h1*h2*256*256 + h1*l2*256 + h2*l1*256 + l1*l2
imul8 result, arg1, arg2
imul8xe result, arg1, arg2
lda #0
sta result + 2
sta result + 3
imul8 inter, arg1 + 1, arg2
imul8xe inter, arg1 + 1, arg2
add16 result + 1, result + 1, inter
add_carry result + 3
imul8 inter, arg1, arg2 + 1
imul8xe inter, arg1, arg2 + 1
add16 result + 1, result + 1, inter
add_carry result + 3
imul8 inter, arg1 + 1, arg2 + 1
imul8xe inter, arg1 + 1, arg2 + 1
add16 result + 2, result + 2, inter
; In case of negative inputs, adjust high word
@ -1147,6 +1147,8 @@ zero_byte_loop:
.proc start
jsr imul8xe_init
; ox = 0; oy = 0; zoom = 0
; count_frames = 0; count_pixels = 0
lda #0