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83 lines
975 B
ArmAsm
83 lines
975 B
ArmAsm
;
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; input
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; Code related to handling input
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;
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; Created by Quinn Dunki on 8/15/17
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;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; kbdScan
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; Processes keyboard input
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;
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; Trashes A
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;
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kbdScan:
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BITS8
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lda KBD
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bpl kbdScanDone
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sta KBDSTROBE
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cmp #(8 + $80)
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beq kbdScanLeftArrow
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cmp #(21 + $80)
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beq kbdScanRightArrow
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cmp #('q' + $80)
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beq kbdScanQ
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cmp #('a' + $80)
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beq kbdScanA
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cmp #('z' + $80)
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beq kbdScanZ
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cmp #(' ' + $80)
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beq kbdScanSpace
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kbdScanDone:
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BITS16
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rts
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kbdScanRightArrow:
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BITS16
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lda mapScrollPos
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cmp #VISIBLETERRAINWIDTH-VISIBLETERRAINWINDOW
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beq kbdScanDone
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inc
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inc
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sta mapScrollRequested
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rts
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kbdScanLeftArrow:
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BITS16
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lda mapScrollPos
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beq kbdScanDone
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dec
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dec
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sta mapScrollRequested
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rts
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kbdScanQ:
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BITS16
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lda #1
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sta quitRequested
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rts
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kbdScanA:
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BITS16
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lda #1
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sta angleDeltaRequested
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rts
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kbdScanZ:
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BITS16
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lda #-1
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sta angleDeltaRequested
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rts
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kbdScanSpace:
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BITS16
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lda #1
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sta fireRequested
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rts
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