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slightly faster key handling

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This commit is contained in:
Peter Ferrie 2019-06-03 11:58:29 -07:00
parent 1496e2cc5d
commit 6afee2f6ea
2 changed files with 6 additions and 7 deletions
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2
pt3_player/interrupt_handler.s
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@ -178,7 +178,7 @@ done_time:
check_keyboard: check_keyboard:
jsr get_key jsr get_key
lda LASTKEY cmp #0
beq exit_interrupt beq exit_interrupt
;==================== ;====================

11
pt3_player/keypress_minimal.s
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@ -11,7 +11,7 @@ get_key:
figure_out_key: figure_out_key:
cmp #' '+128 ; the mask destroys space ; 2 cmp #' '+128 ; the mask destroys space ; 2
beq save_key ; so handle it specially ; 2nt/3 beq return_key ; so handle it specially ; 2nt/3
check_right_arrow: check_right_arrow:
cmp #$95 ; 2 cmp #$95 ; 2
@ -32,15 +32,14 @@ check_down_arrow:
check_escape: check_escape:
and #$5f ; mask, to make upper-case ; 2 and #$5f ; mask, to make upper-case ; 2
cmp #$1B ; 2 cmp #$1B ; 2
bne save_key ; 2nt/3 bne return_key ; 2nt/3
lda #'Q' ; 2 lda #'Q' ; 2
bne save_key ; branch always ; 3 bne return_key ; branch always ; 3
no_key: no_key:
lda #0 ; no key, so save a zero ; 2 lda #0 ; no key, so return a zero ; 2
save_key: return_key:
sta LASTKEY ; save the key to our buffer ; 2
rts ; 6 rts ; 6
;============ ;============