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tfv: small comment

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This commit is contained in:
Vince Weaver 2017-09-07 01:40:00 -04:00
parent 20b070a413
commit 6f2fe7e194
2 changed files with 3 additions and 1 deletions
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1
tfv/tfv_flying.s
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@ -556,6 +556,7 @@ lookup_map:
asl ; multiply by 8 asl ; multiply by 8
clc clc
adc TEMPY ; add in X value adc TEMPY ; add in X value
; (use OR instead?)
ldy SPACEX_I ldy SPACEX_I
cpy #$8 cpy #$8

3
tfv/tfv_multiply.s
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@ -1,6 +1,7 @@
; http://www.llx.com/~nparker/a2/mult.html ; http://www.llx.com/~nparker/a2/mult.html
; MULTIPLY NUM1H:NUM1L * NUM2H:NUM2L ; MULTIPLY NUM1H:NUM1L * NUM2H:NUM2L
; NUM2 is zero in end ; NUM2 is zeroed out
; result is in RESULT3:RESULT2:RESULT1:RESULT0
NUM1L: .byte 0 NUM1L: .byte 0
NUM1H: .byte 0 NUM1H: .byte 0