base:sign_extension
Convert a signed 8-bit number to a signed 16-bit number, with .Y holding the high byte:
ldy #$00 lda value bpl :+ dey :
base/sign_extension.txt · Last modified: 2015-04-17 04:33 by 127.0.0.1
Convert a signed 8-bit number to a signed 16-bit number, with .Y holding the high byte:
ldy #$00 lda value bpl :+ dey :