mirror of
https://github.com/a2-4am/4cade.git
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69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
;license:MIT
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;(c) 2018-2020 by 4am
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;
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; credits page
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;
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; Public functions
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; - Credits
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; - Help
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;
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;------------------------------------------------------------------------------
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; Credits
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; display credits page and wait
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;
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; in: none
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; out: C clear
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; all other flags and registers clobbered
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;------------------------------------------------------------------------------
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Credits
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jsr LoadFile ; load credits text into $8000
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!word kRootDirectory
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!word kCreditsFile
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!word $8000
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-- jsr ForceHGRMode
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jsr ClearOffscreen
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ldx #0
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- lda OffscreenPage
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ror ; draw on offscreen page
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+LDADDR $8000
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jsr DrawPage ; draw credits
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jsr ShowOtherPage ; show credits
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jsr WaitForKeyFor30Seconds; wait
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bit CLEARKBD ; don't care about key
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cmp #$81 ; Ctrl-A = about
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beq Credits
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cmp #$90 ; Ctrl-P = launch joystick calibration program
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bne +
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jmp Joystick
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+ cmp #$83 ; Ctrl-C = toggle cheat mode
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bne +
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jsr ToggleCheat
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+ sec ; if called from search mode, tell caller to refresh
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rts
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;------------------------------------------------------------------------------
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; Help
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; display per-game or global help page and wait
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;
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; in: none
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; out: see above
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;------------------------------------------------------------------------------
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Help
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jsr GetGameToLaunch
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bcs @global
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+ST16 @fname
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jsr LoadFile
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!word kGameHelpDirectory
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@fname !word $FDFD ; SMC
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!word $8000
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clc
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bcc -- ; always branches
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@global jsr LoadFile ; load help text into $8000
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!word kRootDirectory
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!word kHelpTextFile
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!word $8000
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jsr LoadHelpOffscreen ; load fancy backdrop
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ldx #7
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bne - ; always branches
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