chris/open-roms
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remove non-alpha flag handling

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Paul Gardner-Stephen committed 2019-04-20 01:02:56 +09:30
1 parent 3f18fce879
commit 7bce9d4c26
1 file changed
+2 -6
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c64/kernal/scan_keyboard.s
+2 -6
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@@ -151,8 +151,6 @@
;; (Carefully avoiding $A7 which is used by 64NET) ;; (Carefully avoiding $A7 which is used by 64NET)
.alias BufferNew $A9 ;// 3 bytes .alias BufferNew $A9 ;// 3 bytes
.alias KeyQuantity $A8 ;// 1 byte .alias KeyQuantity $A8 ;// 1 byte
.alias NonAlphaFlagX $B4 ;// 1 byte
.alias NonAlphaFlagY $B5 ;// 1 byte
.alias TempZP $B6 ;// 1 byte .alias TempZP $B6 ;// 1 byte
.alias SimultaneousKeys $F7 ;// 1 byte .alias SimultaneousKeys $F7 ;// 1 byte
@@ -326,6 +324,7 @@ skip0:
dex dex
bpl - bpl -
;; X gets back to $FF here, which is assumed below
;; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ;; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
;; // Check for Control Port #1 Activity (again) ;; // Check for Control Port #1 Activity (again)
@@ -345,7 +344,6 @@ skip0:
;; // Reset Non-AlphaNumeric Flag ;; // Reset Non-AlphaNumeric Flag
inx inx
stx NonAlphaFlagY
;; // Set max keys allowed before ignoring result ;; // Set max keys allowed before ignoring result
lda #MaxKeyRollover lda #MaxKeyRollover
@@ -506,9 +504,7 @@ Return: ;; // A is preset
stx BufferOld+1 stx BufferOld+1
ldx BufferNew+2 ldx BufferNew+2
stx BufferOld+2 stx BufferOld+2
;; // Handle Non Alphanumeric Keys
ldx NonAlphaFlagX
ldy NonAlphaFlagY
rts rts
TooManyNewKeys: TooManyNewKeys: