compyx 381a32d9aa C64 soft80-conio cgetc: save 14 cycles in invertcursor ...

By 'inverting' the loop, we can save 16 cycles by removing the `cpy #8`,
saving 16 cycles. But we need an extra `ldy #7` at the start of the
loop, so the total cycles saved is 14. Code size doesn't increase due to
the addition of the `ldy #7` negating the removal of the `cpy #xx`.

2020-07-11 17:46:29 +02:00

2.1 KiB

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