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dos33fsprogs/games/lemm/lemm.s

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; Lemm Proof of Concept
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "qload.inc"
.include "lemming_status.inc"
lemm_test_start:
lda #0
sta DRAW_PAGE
;====================
; show title message
;====================
jsr show_title
;====================
; detect model
;====================
jsr detect_appleii_model
;===================
; machine workarounds
;===================
; mostly IIgs
;===================
; thanks to 4am who provided this code from Total Replay
lda ROM_MACHINEID
cmp #$06
bne not_a_iigs
sec
jsr $FE1F ; check for IIgs
bcs not_a_iigs
; gr/text page2 handling broken on early IIgs models
; this enables the workaround
jsr ROM_TEXT2COPY ; set alternate display mode on IIgs
cli ; enable VBL interrupts
; also set background color to black instead of blue
lda NEWVIDEO
and #%00011111 ; bit 7 = 0 -> IIgs Apple II-compat video modes
; bit 6 = 0 -> IIgs 128K memory map same as IIe
; bit 5 = 0 -> IIgs DHGR is color, not mono
; bits 0-4 unchanged
sta NEWVIDEO
lda #$F0
sta TBCOLOR ; white text on black background
lda #$00
sta CLOCKCTL ; black border
sta CLOCKCTL ; set twice for VidHD
not_a_iigs:
;===================
; print config
;===================
lda #<config_string
sta OUTL
lda #>config_string
sta OUTH
jsr move_and_print
; print detected model
lda APPLEII_MODEL
ora #$80
sta $7d0+8 ; 23,8
; if GS print the extra S
cmp #'G'|$80
bne not_gs
lda #'S'|$80
sta $7d0+9
not_gs:
;=========================================
; detect if we have a language card (64k)
; and load sound into it if possible
;===================================
lda #0
sta SOUND_STATUS ; clear out, sound enabled
;===========================================
; skip checks if open-apple being held down
lda $C061
and #$80 ; only bit 7 is affected
bne skip_all_checks ; rest is floating bus
jsr detect_language_card
bcs no_language_card
yes_language_card:
; update status
lda #'6'|$80
sta $7d0+11 ; 23,11
lda #'4'|$80
sta $7d0+12 ; 23,12
; update sound status
lda SOUND_STATUS
ora #SOUND_IN_LC
sta SOUND_STATUS
jmp done_language_card
no_language_card:
done_language_card:
;===================================
; Detect Mockingboard
;===================================
PT3_ENABLE_APPLE_IIC = 1
; detect mockingboard
jsr mockingboard_detect
bcc mockingboard_notfound
mockingboard_found:
; print detected location
lda #'S'+$80 ; change NO to slot
sta $7d0+30
lda MB_ADDR_H ; $C4 = 4, want $B4 1100 -> 1011
and #$87
ora #$30
sta $7d0+31 ; 23,31
; NOTE: in this game we need both language card && mockingboard
; to enable mockingboard music
lda SOUND_STATUS
and #SOUND_IN_LC
beq dont_enable_mc
lda SOUND_STATUS
ora #SOUND_MOCKINGBOARD
sta SOUND_STATUS
dont_enable_mc:
mockingboard_notfound:
skip_all_checks:
;==================================
; load sound into the language card
; into $D000 set 1
;==================================
; read/write RAM, use $d000 bank1
bit $C083
bit $C083
lda #<letsgo
sta getsrc_smc+1
lda #>letsgo
sta getsrc_smc+2
lda #$D0 ; decompress to $D000
jsr decompress_lzsa2_fast
; read/write RAM, use $d000 bank2
bit $C08b
bit $C08b
;==================================
; load music into the language card
; into $D000 set 2
;==================================
; switch in language card
; read/write RAM, $d000 bank 2
lda $C08b
lda $C08b
jsr mockingboard_patch ; patch to work in slots other than 4?
;=======================
; Set up 50Hz interrupt
;========================
jsr mockingboard_init
jsr mockingboard_setup_interrupt
zurg:
;============================
; Init the Mockingboard
;============================
jsr reset_ay_both
jsr clear_ay_both
;=======================
; wait for keypress
;=======================
; jsr wait_until_keypress
lda #25
jsr wait_a_bit
; load level from disk
lda #1
sta WHICH_LOAD
jsr load_file
;=======================
; do level1
;=======================
play_level1:
jsr do_level1
lda LEVEL_OVER
cmp #LEVEL_WIN
beq play_level5
bne play_level1
;=======================
; do level5
;=======================
play_level5:
jsr do_level5
lda LEVEL_OVER
cmp #LEVEL_WIN
beq play_level1
bne play_level5
;========================
; load song chunk
; CURRENT_CHUNK is which one, 0..N
; CHUNK_DEST is $D0 or $E8
load_song_chunk:
ldx CURRENT_CHUNK
chunk_l_smc:
lda music6_parts_l,X
sta getsrc_smc+1 ; LZSA_SRC_LO
chunk_h_smc:
lda music6_parts_h,X
sta getsrc_smc+2 ; LZSA_SRC_HI
bne load_song_chunk_good
; $00 in chunk table means we are off the end, so wrap
lda #$00
sta CURRENT_CHUNK ; reset chunk to 0
beq load_song_chunk ; try again
load_song_chunk_good:
lda CHUNK_NEXT_LOAD ; decompress to $D0 or $E8
; eor #$38 ; want the opposite of CHUNK_DEST
jsr decompress_lzsa2_fast
lda CHUNK_NEXT_LOAD ; point to next location
eor #$38
sta CHUNK_NEXT_LOAD
rts
;==========================
; includes
;==========================
.include "gr_offsets.s"
; .include "decompress_fast_v2.s"
.include "wait_keypress.s"
.include "keyboard.s"
.include "joystick.s"
.include "gr_fast_clear.s"
.include "hgr_partial_save.s"
.include "move_lemming.s"
.include "draw_lemming.s"
.include "hgr_14x14_sprite.s"
.include "text_print.s"
.include "lc_detect.s"
.include "draw_pointer.s"
.include "hgr_tables.s"
.include "hgr_sprite.s"
.include "update_time.s"
.include "intro_level1.s"
.include "draw_flames.s"
.include "draw_door.s"
.include "hgr_hlin.s"
.include "hgr_vlin.s"
.include "update_menu.s"
.include "wait_a_bit.s"
.include "title.s"
; .include "audio.s"
.include "letsgo.s"
.include "particle_hgr.s"
.include "wait.s"
; pt3 player
;.include "pt3_lib_mockingboard.inc"
.include "pt3_lib_detect_model.s"
.include "pt3_lib_mockingboard_detect.s"
.include "pt3_lib_mockingboard_setup.s"
.include "interrupt_handler.s"
.include "pt3_lib_mockingboard_patch.s"
config_string:
; 0123456789012345678901234567890123456789
.byte 0,23,"APPLE II?, 48K, MOCKINGBOARD: NO, SSI: N",0
; MOCKINGBOARD: NONE
.include "graphics/sprites.inc"
letsgo:
.incbin "sounds/letsgo.btc.lz4"
; .include "level1.s"
.include "level5.s"
do_level1 = $a000
level1_preview_lzsa = $b06b
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