Quick question. I was looking into memory addresses that seem to be involved with what letter one will get at the end of each level. I tested this out and found that when 000E is unsigned 64 the letter will be "W", and if it is unsigned 80 it will be a "Y". 000E seems to be used for other things, but I did notice that it seems to be involved when the letter is revealed. I forced an 80 on those frames when it should be a "W" and the top was a "W" and the bottom was a "Y". I looked into the code of what is writing to 000E, as to why this value is different in each case to find what may be the ultimate factor or main memory address involved. Here is a bit of code, they both seem to have A and X registers identical but yet later in the code it seems to function as if the X register is different. Help is appreciated in understanding this. Seems to be different because of instruction ASL, what is this?
$9FAF:20 7D E4 JSR $E47D A:07 X:00 Y:02 S:74 P:nvUbdizc
$E47D:85 5D STA $005D = #$08 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E47F:A9 00 LDA #$00 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E481:8D 27 00 STA $0027 = #$01 A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E484:A9 07 LDA #$07 A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E486:05 5C ORA $005C = #$40 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E488:8D 00 80 STA $8000 = #$A9 A:47 X:00 Y:02 S:72 P:nvUbdizc
$E48B:A5 5D LDA $005D = #$07 A:47 X:00 Y:02 S:72 P:nvUbdizc
$E48D:8D 01 80 STA $8001 = #$04 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E490:AD 27 00 LDA $0027 = #$00 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E493:D0 EA BNE $E47F A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E495:60 RTS (from $E47D) --------------------------- A:00 X:00 Y:02 S:72 P:nvUbdiZc
$9FB2:68 PLA A:00 X:00 Y:02 S:74 P:nvUbdiZc
$9FB3:0A ASL A:18 X:00 Y:02 S:75 P:nvUbdizc
$9FB4:AA TAX A:30 X:00 Y:02 S:75 P:nvUbdizc
$9FB5:BD 74 BF LDA $BF74,X @ $BFA4 = #$50 A:30 X:30 Y:02 S:75 P:nvUbdizc
$9FB8:85 0E STA $000E = #$E0 A:50 X:30 Y:02 S:75 P:nvUbdizc
$9FBA:BD 75 BF LDA $BF75,X @ $BFA5 = #$BF A:50 X:30 Y:02 S:75 P:nvUbdizc
$9FBD:85 0F STA $000F = #$01 A:BF X:30 Y:02 S:75 P:NvUbdizc
$9FBF:A0 04 LDY #$04 A:BF X:30 Y:02 S:75 P:NvUbdizc
$9FC1:B1 0E LDA ($0E),Y @ $BF54 = #$62 A:BF X:30 Y:04 S:75 P:nvUbdizc
$9FC3:85 A6 STA $00A6 = #$76 A:62 X:30 Y:04 S:75 P:nvUbdizc
$9FC5:C8 INY A:62 X:30 Y:04 S:75 P:nvUbdizc
$9FC6:B1 0E LDA ($0E),Y @ $BF55 = #$63 A:62 X:30 Y:05 S:75 P:nvUbdizc
$9FC8:85 A7 STA $00A7 = #$77 A:63 X:30 Y:05 S:75 P:nvUbdizc
Compared to this:
$9FAF:20 7D E4 JSR $E47D A:07 X:00 Y:02 S:74 P:nvUbdizc
$E47D:85 5D STA $005D = #$08 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E47F:A9 00 LDA #$00 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E481:8D 27 00 STA $0027 = #$01 A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E484:A9 07 LDA #$07 A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E486:05 5C ORA $005C = #$40 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E488:8D 00 80 STA $8000 = #$A9 A:47 X:00 Y:02 S:72 P:nvUbdizc
$E48B:A5 5D LDA $005D = #$07 A:47 X:00 Y:02 S:72 P:nvUbdizc
$E48D:8D 01 80 STA $8001 = #$04 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E490:AD 27 00 LDA $0027 = #$00 A:07 X:00 Y:02 S:72 P:nvUbdizc
$E493:D0 EA BNE $E47F A:00 X:00 Y:02 S:72 P:nvUbdiZc
$E495:60 RTS (from $E47D) --------------------------- A:00 X:00 Y:02 S:72 P:nvUbdiZc
$9FB2:68 PLA A:00 X:00 Y:02 S:74 P:nvUbdiZc
$9FB3:0A ASL A:16 X:00 Y:02 S:75 P:nvUbdizc
$9FB4:AA TAX A:2C X:00 Y:02 S:75 P:nvUbdizc
$9FB5:BD 74 BF LDA $BF74,X @ $BFA0 = #$40 A:2C X:2C Y:02 S:75 P:nvUbdizc
$9FB8:85 0E STA $000E = #$E0 A:40 X:2C Y:02 S:75 P:nvUbdizc
$9FBA:BD 75 BF LDA $BF75,X @ $BFA1 = #$BF A:40 X:2C Y:02 S:75 P:nvUbdizc
$9FBD:85 0F STA $000F = #$01 A:BF X:2C Y:02 S:75 P:NvUbdizc
$9FBF:A0 04 LDY #$04 A:BF X:2C Y:02 S:75 P:NvUbdizc
$9FC1:B1 0E LDA ($0E),Y @ $BF44 = #$5E A:BF X:2C Y:04 S:75 P:nvUbdizc
$9FC3:85 A6 STA $00A6 = #$76 A:5E X:2C Y:04 S:75 P:nvUbdizc
$9FC5:C8 INY A:5E X:2C Y:04 S:75 P:nvUbdizc
$9FC6:B1 0E LDA ($0E),Y @ $BF45 = #$5F A:5E X:2C Y:05 S:75 P:nvUbdizc
$9FC8:85 A7 STA $00A7 = #$77 A:5F X:2C Y:05 S:75 P:nvUbdizc
