base:advanced_optimizing
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| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
| base:advanced_optimizing [2021-03-05 16:57] – [Forming terms] bitbreaker | base:advanced_optimizing [2022-01-14 12:26] – [Incrementing related pointers] bitbreaker | ||
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| Actually you can use LAX also with an immediate value, but it behaves a bit unstable regarding the given immediate value. However when simply doing an LAX #$00 you are fine. | Actually you can use LAX also with an immediate value, but it behaves a bit unstable regarding the given immediate value. However when simply doing an LAX #$00 you are fine. | ||
| + | |||
| + | lda $xxxx,y is not available as 8 bit version, so an lda $xx,y is not possible. With lax $xx,y there is howeever a way to imitate a lda $xx,y at the cost of destroying x. | ||
| ===== SAX/SHA ===== | ===== SAX/SHA ===== | ||
| Line 1537: | Line 1539: | ||
| < | < | ||
| - | lda bmp | + | lda bmp ;could also use lax bmp, sbx #$08, stx bmp to save more cycles |
| sec | sec | ||
| sbc #$08 | sbc #$08 | ||
base/advanced_optimizing.txt · Last modified: 2024-03-03 11:06 by bitbreaker