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tweak

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Brooke Vibber 2024-12-30 13:44:31 -08:00
parent 14125a398a
commit 63e74d5152
2 changed files with 5 additions and 2 deletions
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5
mandel.s
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@ -434,13 +434,16 @@ viewport_oy:
sta dest + 1 sta dest + 1
.endmacro .endmacro
.segment "TABLES"
; lookup table for top byte -> PORTB value for bank-switch ; lookup table for top byte -> PORTB value for bank-switch
;.align 256 ; warning - if not aligned this will cost an extra cycle sometimes .align 256
bank_switch_table: bank_switch_table:
.repeat 256, i .repeat 256, i
.byte ((i & $c0) >> 4) | $e3 .byte ((i & $c0) >> 4) | $e3
.endrepeat .endrepeat
.code
.macro bank_switch bank .macro bank_switch bank
lda #((bank << 2) | $e3) lda #((bank << 2) | $e3)
sta PORTB sta PORTB

2
todo.md
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@ -11,6 +11,6 @@ things to try:
* 'wide pixels' 2x and 4x for a fuller initial image in the tiered rendering * 'wide pixels' 2x and 4x for a fuller initial image in the tiered rendering
* extact viewport for display & re-input via keyboard * extract viewport for display & re-input via keyboard
* fujinet screenshot/viewport uploader * fujinet screenshot/viewport uploader