2023-10-03 20:27:24 +00:00
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; Unwisely messing with Second Reality
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; by deater (Vince Weaver) <vince@deater.net>
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.include "zp.inc"
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.include "hardware.inc"
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.include "qload.inc"
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.include "music.inc"
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second_start:
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;=====================
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; initializations
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;=====================
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;=====================
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; detect model
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;=====================
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jsr detect_appleii_model
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;=====================
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; Machine workarounds
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;=====================
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; mostly IIgs
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; thanks to 4am for this code from total replay
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lda ROM_MACHINEID
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cmp #$06
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bne not_a_iigs
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sec
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jsr $FE1F ; check for IIgs
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bcs not_a_iigs
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; gr/text page2 handling broken on early IIgs models
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; this enables the workaround
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jsr ROM_TEXT2COPY ; set alternate display mode on IIgs
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cli ; enable VBL interrupts
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; also set background color to black instead of blue
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lda NEWVIDEO
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and #%00011111 ; bit 7 = 0 -> IIgs Apple II-compat video modes
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; bit 6 = 0 -> IIgs 128K memory map same as IIe
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; bit 5 = 0 -> IIgs DHGR is color, not mono
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; bits 0-4 unchanged
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sta NEWVIDEO
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lda #$F0
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sta TBCOLOR ; white text on black background
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lda #$00
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sta CLOCKCTL ; black border
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sta CLOCKCTL ; set twice for VidHD
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not_a_iigs:
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;===================
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; restart?
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;===================
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restart:
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lda #0
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sta DRAW_PAGE
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;===================
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; show title screen
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;===================
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jsr show_title
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;===================
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; print config
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;===================
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jsr set_normal
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lda #<config_string
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sta OUTL
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lda #>config_string
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sta OUTH
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jsr move_and_print
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; print detected model
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lda APPLEII_MODEL
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ora #$80
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sta $7d0+8 ; 23,8
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; if GS print the extra S
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cmp #'G'|$80
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bne not_gs
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lda #'S'|$80
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sta $7d0+9
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not_gs:
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;=========================================
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; detect if we have a language card (64k)
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;===================================
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; we might want to later load sound high,
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; for now always enable sound
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lda #0
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sta SOUND_STATUS ; clear out, sound enabled
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jsr detect_language_card
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bcs no_language_card
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yes_language_card:
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; update status on title screen
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lda #'6'|$80
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sta $7d0+11 ; 23,11
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lda #'4'|$80
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sta $7d0+12 ; 23,12
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; update sound status
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lda SOUND_STATUS
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ora #SOUND_IN_LC
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sta SOUND_STATUS
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; jmp done_language_card
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no_language_card:
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done_language_card:
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;===================================
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; Detect Mockingboard
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;===================================
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; detect mockingboard
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jsr mockingboard_detect
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bcc mockingboard_notfound
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mockingboard_found:
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; print detected location
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lda #'S'+$80 ; change NO to slot
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sta $7d0+30
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lda MB_ADDR_H ; $C4 = 4, want $B4 1100 -> 1011
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and #$87
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ora #$30
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sta $7d0+31 ; 23,31
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; for now, don't require language card
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lda SOUND_STATUS
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and #SOUND_IN_LC
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beq dont_enable_mc
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lda SOUND_STATUS
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ora #SOUND_MOCKINGBOARD
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sta SOUND_STATUS
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;==================================
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; load sound into the language card
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; into $D000 set 1
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;==================================
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; read/write RAM, use $d000 bank1
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bit $C083
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bit $C083
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lda #1
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sta WHICH_LOAD
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jsr load_file
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lda #0
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sta DONE_PLAYING
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lda #1
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sta LOOP
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; patch mockingboard
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jsr mockingboard_patch ; patch to work in slots other than 4?
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;=======================
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; Set up 50Hz interrupt
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;========================
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jsr mockingboard_init
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jsr mockingboard_setup_interrupt
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;============================
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; Init the Mockingboard
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;============================
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jsr reset_ay_both
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jsr clear_ay_both
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;==================
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; init song
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;==================
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jsr pt3_init_song
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dont_enable_mc:
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mockingboard_notfound:
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skip_all_checks:
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;=======================
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; wait for keypress
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;=======================
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; jsr wait_until_keypress
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lda #25
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jsr wait_a_bit
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;===================
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; Load graphics
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;===================
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load_loop:
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; jsr HGR
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bit SET_GR
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bit HIRES
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bit FULLGR
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bit PAGE1
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;=======================
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; start music
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;=======================
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2023-10-17 05:19:06 +00:00
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lda #5 ; OCEAN
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; lda #4 ; THREED
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; lda #3 ; TUNNEL
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; lda #2 ; INTRO
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2023-10-05 19:02:28 +00:00
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2023-10-03 20:27:24 +00:00
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sta WHICH_LOAD
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jsr load_file
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2023-10-18 05:10:30 +00:00
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; setup music
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; ocean=pattern24 (3:07) pattern#43
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lda #43
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sta $55A+$D000 ;current_pattern_smc+1
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jsr $559+$D000 ; pt3_set_pattern
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2023-10-03 20:27:24 +00:00
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cli
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2023-10-17 05:19:06 +00:00
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; jmp $4000
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jmp $6000
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2023-10-03 20:27:24 +00:00
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forever:
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jmp forever
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.align $100
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.include "wait_keypress.s"
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.include "zx02_optim.s"
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.include "title.s"
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config_string:
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; 0123456789012345678901234567890123456789
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.byte 0,23,"APPLE II?, 48K, MOCKINGBOARD: NO, SSI: N",0
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.include "pt3_lib_mockingboard_patch.s"
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