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shave some bytes, add some comments
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4am
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commit
308fdea6d0
@ -81,6 +81,7 @@ RestoreStackNextTime
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!source "src/parse.common.a"
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!source "src/parse.prefs.a"
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!source "src/ui.font.a"
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; add new files above here so ui.common stays last
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!source "src/ui.common.a"
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MachineStatus
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!byte 0
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@ -9,7 +9,7 @@
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; D000..E4E9 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
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; ...end of data and start of code are approximate, in between is unused...
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; ...if they ever overlap, things will go boom...
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; E9C4..FFF9 - main program code
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; E9C9..FFF9 - main program code
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; FFFA..FFFF - NMI, reset, IRQ vectors
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;
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; LC RAM BANK 2
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122
src/ui.common.a
122
src/ui.common.a
@ -58,10 +58,15 @@ ReturnToPlay
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!byte $0D
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!text " to play"
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GetOffscreenAddress
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;------------------------------------------------------------------------------
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; GetOffscreenAddress
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; get high byte of HGR page that is currently not showing
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;
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; in: none
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; out: A = high byte of offscreen HGR page (#$20 or #$40)
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; preserves X/Y
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;------------------------------------------------------------------------------
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GetOffscreenAddress
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lda OffscreenPage
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beq +
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lda #$40
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@ -69,12 +74,26 @@ GetOffscreenAddress
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+ lda #$20
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rts
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;------------------------------------------------------------------------------
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; LoadTitleOffscreen
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; load title screen in the HGR page that is currently not showing
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;
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; in: none
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; out: all flags and registers clobbered
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;------------------------------------------------------------------------------
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LoadTitleOffscreen
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; clobbers all
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+LDADDR .TitleFile
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bne + ; Always branches, because Y is loaded
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; last with the high byte of the address,
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; which is never 0. I miss my 65c02.
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;------------------------------------------------------------------------------
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; LoadCoverOffscreen
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; load cover screen in the HGR page that is currently not showing
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;
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; in: none
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; out: all flags and registers clobbered
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;------------------------------------------------------------------------------
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LoadCoverOffscreen
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; clobbers all
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+LDADDR .CoverFile
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@ -95,8 +114,14 @@ LoadCoverOffscreen
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!byte 5
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!text "COVER"
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;------------------------------------------------------------------------------
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; CoverFade
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; load cover screen and animate per-character fade
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;
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; in: none
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; out: all flags and registers clobbered
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;------------------------------------------------------------------------------
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CoverFade
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; clobbers all
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jsr LoadCoverOffscreen
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jsr ShowOtherPage
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lda OffscreenPage
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@ -113,8 +138,14 @@ CoverFade
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!byte 9
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!text "COVERFADE"
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;------------------------------------------------------------------------------
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; DrawSearchBarOffscreen
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; draw 2-line search UI on the HGR page that is not currently showing
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;
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; in: none
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; out: all flags and registers clobbered
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;------------------------------------------------------------------------------
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DrawSearchBarOffscreen
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; clobbers all
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LDA #22 ; draw visible search bar
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sta VTAB
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lda OffscreenPage
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@ -156,10 +187,15 @@ ClearOffscreen
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bne @a
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rts
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ShowOtherPage
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;------------------------------------------------------------------------------
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; ShowOtherPage
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; switch to the HGR page that is not currently showing
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;
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; in: none
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; out: A = new value of OffscreenPage
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; preserves X/Y
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;------------------------------------------------------------------------------
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ShowOtherPage
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jsr ToggleOffscreenPage
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bne +
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bit PAGE2 ; show page 2
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@ -167,50 +203,21 @@ ShowOtherPage
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+ bit PAGE1 ; show page 1
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rts
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ToggleOffscreenPage
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;------------------------------------------------------------------------------
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; ToggleOffscreenPage
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; switch the internal variable that tracks which HGR page is showing
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; (does not affect screen)
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;
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; in: none
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; out: A = new value of OffscreenPage
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; preserves X/Y
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;------------------------------------------------------------------------------
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ToggleOffscreenPage
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lda OffscreenPage
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eor #$01
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sta OffscreenPage
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rts
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;------------------------------------------------------------------------------
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; WaitForKeyFor30Seconds
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; does what it says on the tin
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;
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; in: none
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; out: if user presses a key before the timer runs out, exits with A = key
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; otherwise exits via MegaAttractMode
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; X/Y preserved
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;------------------------------------------------------------------------------
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WaitForKeyFor30Seconds
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lda KBD
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bmi @gotKey ; if we have a key on entry, exit with it in A
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lda #$16 ; initialize timeout counters
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sta Timeout
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sta Timeout+1
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sta Timeout+2
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@loop
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lda KBD
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bmi @gotKey
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inc RNDSEED+1 ; these are only ever incremented, never
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bne + ; reset (may be used as a pseudorandom
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inc RNDSEED ; seed)
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+
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dec Timeout ; these are a 3-byte timeout counter
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bne @loop ; that counts down from a number set
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dec Timeout+1 ; in .ResetInputTimeout and reset
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bne @loop ; on every keypress (whether or not
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dec Timeout+2 ; the key leads to an action)
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bne @loop
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jsr CoverFade ; no input for ~30 seconds, switch to
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jmp MegaAttractMode ; mega-attract mode
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@gotKey rts
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;------------------------------------------------------------------------------
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; SoftBell
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; yell at the user, but, like, gently
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@ -386,4 +393,37 @@ IsSearchKey
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ldx #0
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rts
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; /!\ keep this last in the file to ensure it doesn't cross a page boundary /!\
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;------------------------------------------------------------------------------
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; WaitForKeyFor30Seconds
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; does what it says on the tin
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;
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; in: none
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; out: if user presses a key before the timer runs out, exits with A = key
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; otherwise exits via MegaAttractMode
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; X/Y preserved
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;------------------------------------------------------------------------------
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WaitForKeyFor30Seconds
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lda #$16 ; initialize timeout counters
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sta Timeout
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sta Timeout+1
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sta Timeout+2
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@loop
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lda KBD
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bmi @gotKey
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inc RNDSEED+1 ; these are only ever incremented, never
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bne + ; reset (may be used as a pseudorandom
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inc RNDSEED ; seed)
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+
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dec Timeout ; these are a 3-byte timeout counter
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bne @loop ; that counts down from a number set
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dec Timeout+1 ; in .ResetInputTimeout and reset
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bne @loop ; on every keypress (whether or not
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dec Timeout+2 ; the key leads to an action)
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bne @loop
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jsr CoverFade ; no input for ~30 seconds, switch to
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jmp MegaAttractMode ; mega-attract mode
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@gotKey rts
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}
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