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dos33fsprogs
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lemm: full song plays 

awkward pauses though, takes more than 50Hz/20ms to decompress
This commit is contained in:
Vince Weaver 2022-03-06 00:15:31 -05:00
parent a63540bc21
commit a38436af74
3 changed files with 97 additions and 181 deletions
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93
games/lemm/interrupt_handler.s
View File

@ -50,7 +50,13 @@ ym_play_music:
frame_loop:
ldy #0
lda (CURRENT_FRAME_L),Y
jsr update_register
cmp #$ff
bne all_good
cpx #1 ; see if A coarse is $FF
beq go_next_chunk ; if so, end of song, loop
all_good:
jsr update_ay_register
clc
lda CURRENT_FRAME_H
@ -70,20 +76,59 @@ frame_loop:
cmp #$D4
bne not_oflo
; FIXME: handle out of data properly
lda #$D0
sta BASE_FRAME_H
go_next_chunk:
inc CURRENT_CHUNK
jsr load_song_chunk
not_oflo:
jmp exit_interrupt
;=================================
; Finally done with this interrupt
;=================================
quiet_exit:
stx DONE_PLAYING
jsr clear_ay_both
; mute the sound
ldx #7
lda #$ff
jsr update_ay_register
jmp done_pt3_update_register
exit_interrupt:
pla
tay ; restore Y
pla
tax ; restore X
pla ; restore a ; 4
; on II+/IIe (but not IIc) we need to do this?
interrupt_smc:
lda $45 ; restore A
plp
rti ; return from interrupt ; 6
;============
; typical
; ???? cycles
update_register:
;=========================
; update ay_register
; reg in X
; value in A
update_ay_register:
pt3_irq_smc2:
stx MOCK_6522_ORA1 ; put address on PA1 ; 4
@ -111,42 +156,6 @@ pt3_irq_smc7:
rts
done_pt3_update_register:
done_pt3_irq_handler:
jmp exit_interrupt
;=================================
; Finally done with this interrupt
;=================================
quiet_exit:
stx DONE_PLAYING
jsr clear_ay_both
ldx #$ff ; also mute the channel
stx AY_REGISTERS+7 ; just in case
exit_interrupt:
pla
tay ; restore Y
pla
tax ; restore X
pla ; restore a ; 4
; on II+/IIe (but not IIc) we need to do this?
interrupt_smc:
lda $45 ; restore A
plp
rti ; return from interrupt ; 6
;============
; typical
; ???? cycles

77
games/lemm/lemm_test.s
View File

@ -163,34 +163,21 @@ skip_all_checks:
; switch in language card
; read/write RAM, $d000 bank 2
lda $C083
lda $C083
; lda $C081 ; enable ROM
; lda $C081 ; enable write
lda $C083
lda $C083
; actually load it
lda #<lemm5_part1_lzsa
sta getsrc_smc+1 ; LZSA_SRC_LO
lda #>lemm5_part1_lzsa
sta getsrc_smc+2 ; LZSA_SRC_HI
lda #0
sta CURRENT_CHUNK
sta DONE_PLAYING
lda #$d0
jsr load_song_chunk
jsr decompress_lzsa2_fast
lda #1
sta LOOP
lda #0
sta DONE_PLAYING
sta BASE_FRAME_L
lda #$D0
sta BASE_FRAME_H
lda #1
sta LOOP
jsr mockingboard_patch ; patch to work in slots other than 4?
jsr mockingboard_patch ; patch to work in slots other than 4?
;=======================
; Set up 50Hz interrupt
@ -283,6 +270,34 @@ load_graphics_loop:
;========================
; load song chunk
; CURRENT_CHUNK is which one
load_song_chunk:
ldx CURRENT_CHUNK
lda music_parts_l,X
sta getsrc_smc+1 ; LZSA_SRC_LO
lda music_parts_h,X
sta getsrc_smc+2 ; LZSA_SRC_HI
bne load_song_chunk_good
; wrapped
lda #$00
sta CURRENT_CHUNK
beq load_song_chunk ; try again
load_song_chunk_good:
lda #$d0
sta BASE_FRAME_H
jsr decompress_lzsa2_fast
lda #0
sta BASE_FRAME_L
rts
;==========================
; includes
;==========================
@ -319,19 +334,17 @@ config_string:
.byte 0,23,"APPLE II?, 48K, MOCKINGBOARD: NO, SSI: N",0
; MOCKINGBOARD: NONE
; .include "pt3_lib_core.s"
; .include "pt3_lib_init.s"
; .include "interrupt_handler.s"
; .include "pt3_lib_mockingboard_detect.s"
; .include "pt3_lib_mockingboard_setup.s"
new_title:
.include "graphics/graphics_test.inc"
music_parts_h:
.byte >lemm5_part1_lzsa,>lemm5_part2_lzsa,>lemm5_part3_lzsa,$00
music_parts_l:
.byte <lemm5_part1_lzsa,<lemm5_part2_lzsa,<lemm5_part3_lzsa
lemm5_part1_lzsa:
.incbin "music/lemm5.part1.lzsa"
lemm5_part2_lzsa:
.incbin "music/lemm5.part2.lzsa"
lemm5_part3_lzsa:
.incbin "music/lemm5.part3.lzsa"

108
games/lemm/zp.inc
View File

@ -50,79 +50,10 @@ CURRENT_FRAME_L = $70
CURRENT_FRAME_H = $71
BASE_FRAME_L = $72
BASE_FRAME_H = $73
CURRENT_CHUNK = $74
; pt3 player registers
REGISTER_DUMP = $70
AY_REGISTERS = $70
A_FINE_TONE = $70
A_COARSE_TONE = $71
B_FINE_TONE = $72
B_COARSE_TONE = $73
C_FINE_TONE = $74
C_COARSE_TONE = $75
NOISE = $76
ENABLE = $77
PT3_MIXER_VAL = $77
A_VOLUME = $78
B_VOLUME = $79
C_VOLUME = $7A
ENVELOPE_FINE = $7B
ENVELOPE_COARSE = $7C
ENVELOPE_SHAPE = $7D
COPY_OFFSET = $7E
DECODER_STATE = $7F
PATTERN_L = $7E
PATTERN_H = $7F
; note 70-7f also used by disk code
; note: rest are up at $f0
; We have to save/restore the following values
; when loading/storing from disk
WHICH_LOAD = $80 ; which file to load
DUKE_XL = $81
DUKE_X = $82 ; location of protagonist
DUKE_Y = $83
DUKE_DIRECTION = $84
DUKE_WALKING = $85
DUKE_JUMPING = $86
LASER_OUT = $87
LASER_X = $88
LASER_Y = $89
LASER_DIRECTION = $8A
APPLEII_MODEL = $8B
TILEMAP_Y = $8C
DUKE_FOOT_OFFSET = $8D
FIREPOWER = $8E
INVENTORY = $8F
INV_RED_KEY = $80
INV_BLUE_KEY = $20
INV_SHOE = $08
INV_GRIP = $02
HEALTH = $90
SCORE0 = $91
SCORE1 = $92
SCORE2 = $93
UPDATE_STATUS = $94
DUKE_FALLING = $95
DUKE_SHOOTING = $96
KICK_UP_DUST = $97
SUPPRESS_WALK = $98
ENEMY_DATAL = $99
ENEMY_DATAH = $9A
DOOR_ACTIVATED = $9B
LASER_TILE = $9C
TILE_TEMP = $9D
; done game puzzle state
@ -153,9 +84,6 @@ DISP_PAGE = $ED ; ALL
DRAW_PAGE = $EE ; ALL
; rest of pt3_player
MB_DETECTED = $EF
WHICH_CHUNK = $F0
MB_CHUNK_OFFSET = $F1
LOOP = $F4
MB_VALUE = $F5
MB_ADDR_L = $F6
@ -163,17 +91,6 @@ MB_ADDR_H = $F7
DONE_PLAYING = $F8
DONE_SONG = $F9
; rest of pt3_player
PT3_TEMP = $EF
ORNAMENT_L = $F0
ORNAMENT_H = $F1
SAMPLE_L = $F2
SAMPLE_H = $F3
TEMP = $FA
TEMPY = $FB
@ -182,26 +99,3 @@ INH = $FD
OUTL = $FE
OUTH = $FF
; read any file slot 6 version
; based on FASTLD6 and RTS copyright (c) Peter Ferrie 2011-2013,2018
; modified to assemble with ca65 -- vmw
; added code to patch it to run from current disk slot -- vmw
adrlo = $26 ; constant from boot prom
adrhi = $27 ; constant from boot prom
tmpsec = $3c ; constant from boot prom
reqsec = $3d ; constant from boot prom
sizelo = $44
sizehi = $45
secsize = $46
ldsizel = $70
ldsizeh = $71
namlo = $7b
namhi = $7c
step = $7d ; state for stepper motor
tmptrk = $7e ; temporary copy of current track
phase = $7f ; current phase for /seek