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chiptune: working on being able to auto-switch to next file
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Vince Weaver
parent
4e2e314fbc
commit
2f4e90f4ab
@ -330,8 +330,9 @@ Thought it only took 1s max? Not in face of interrupts.
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Every 20,000 an interrupt
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1,500 for music
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7,500 for volume bars
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1,794 for raster bars
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16,200 (!)for raster bars
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2,000 for misc rest
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Roughly 13,000 cycles, leaving only 7000 to userspace
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If takes 700,000 cycles to decode a block, will take 100
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@ -7,6 +7,8 @@ UNPACK_BUFFER EQU $5E00 ; $5E00 - $9600, 14k, $3800
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; trying not to hit DOS at $9600
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; Reserve 3 chunks plus spare (14k)
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NUM_FILES EQU 15
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;=============================
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; Setup
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;=============================
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@ -24,6 +26,9 @@ UNPACK_BUFFER EQU $5E00 ; $5E00 - $9600, 14k, $3800
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sta MB_CHUNK_OFFSET
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sta DECODE_ERROR
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lda #1
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sta WHICH_FILE
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; print detection message
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lda #<mocking_message ; load loading message
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@ -76,6 +81,8 @@ mockingboard_found:
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; Enable 50Hz clock on 6522
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;============================
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sei ; disable interrupts just in case
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lda #$40 ; Continuous interrupts, don't touch PB7
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sta $C40B ; ACR register
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lda #$7F ; clear all interrupt flags
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@ -136,7 +143,7 @@ mockingboard_found:
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; Enable 6502 interrupts
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;============================
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cli ; clear interrupt mask
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;cli ; clear interrupt mask
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;============================
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@ -201,33 +208,37 @@ check_done:
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done_play:
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; FIXME: disable timer on 6522
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; FIXME: unhook interrupt handler
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; ; FIXME: disable timer on 6522
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; ; FIXME: unhook interrupt handler
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;
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sei ; disable interrupts
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;
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jsr clear_ay_both
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lda #0
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sta CH
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jsr clear_bottoms
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;
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; lda #21
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; sta CV
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; lda #<done_message
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; sta OUTL
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; lda #>done_message
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; sta OUTH
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lda #21
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sta CV
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lda #<done_message
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sta OUTL
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lda #>done_message
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sta OUTH
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; jsr print_both_pages
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jsr print_both_pages
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jsr increment_file
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jsr new_song
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jmp main_loop
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forever_loop:
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jmp forever_loop
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;=================
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; load a new song
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;=================
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@ -271,10 +282,23 @@ new_song:
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; Load in KRW file
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;===========================
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lda #<krw_file ; point to filename
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sta INL
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lda #>krw_file
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sta INH
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jsr get_filename
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lda #8
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sta CH
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lda #21
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sta CV
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lda INL
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sta OUTL
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lda INH
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sta OUTH
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jsr print_both_pages
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; lda #<krw_file ; point to filename
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; sta INL
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; lda #>krw_file
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; sta INH
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disk_buff EQU LZ4_BUFFER
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read_size EQU $4000
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@ -337,7 +361,7 @@ read_size EQU $4000
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jsr setup_next_subsong
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cli ; start playing
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rts
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@ -437,11 +461,79 @@ page_copy_loop:
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;======================
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; 2+14*256+6+29= 3621
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;==================
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; Get filename
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;==================
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; WHICH_FILE holds number
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; MAX_FILES has max
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; Scroll through until find
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; point INH:INL to it
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get_filename:
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ldy #0
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ldx WHICH_FILE
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lda #<krw_file ; point to filename
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sta INL
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lda #>krw_file
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sta INH
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get_filename_loop:
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cpx #0
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beq filename_found
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inner_loop:
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iny
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lda (INL),Y
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bne inner_loop
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iny
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dex
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jmp get_filename_loop
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filename_found:
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tya
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clc
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adc INL
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sta INL
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lda INH
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adc #0
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sta INH
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rts
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;===============================
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; Increment file we want to load
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;===============================
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increment_file:
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inc WHICH_FILE
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lda WHICH_FILE
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cmp NUM_FILES
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bne done_increment
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lda #0
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sta WHICH_FILE
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done_increment:
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rts
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;===============================
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; Decrement file we want to load
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;===============================
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decrement_file:
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dec WHICH_FILE
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bpl done_decrement
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lda #(NUM_FILES-1)
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sta WHICH_FILE
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done_decrement:
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rts
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;==========
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; filenames
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;==========
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krw_file:
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.asciiz "INTRO2.KRW"
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.asciiz "INTRO2.KRW"
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.asciiz "KORO.KRW"
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.asciiz "DEATH2.KRW"
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.asciiz "DEMO4.KRW"
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.asciiz "WAVE.KRW"
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@ -482,7 +574,7 @@ mocking_message: .asciiz "LOOKING FOR MOCKINGBOARD IN SLOT #4"
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not_message: .byte "NOT "
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found_message: .asciiz "FOUND"
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done_message: .asciiz "DONE PLAYING"
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loading_message: .asciiz "LOADING..."
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loading_message: .asciiz "LOADING"
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;============
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; graphics
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@ -22,11 +22,13 @@ draw_rasters:
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ldy #(NUM_ROWS-1) ; 2
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lda #0 ; 2
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init_rows:
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sta row_color,Y ; 5
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dey ; 2
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bpl init_rows ; 2nt/3
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;==============
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; 4+20*10 = 204
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;================
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; set colors
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@ -55,6 +57,9 @@ init_rows:
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lda #COLOR_BOTH_RED ; red ; 2
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jsr set_row_color ; 6+136
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;==============
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; 8 * 144
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; 1152
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;=================
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; draw rows
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@ -80,7 +85,9 @@ draw_rows_loop:
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draw_rows_skip:
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dey ; 2
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bpl draw_rows_loop ; 3/2nt
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;=============
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; 20 * 741
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; 14,820
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;==================
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; update y pointer
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;==================
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@ -93,8 +100,13 @@ not_there:
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sty SCREEN_Y ; 3
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rts ; 6
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;===========
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; 1794
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; 24
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;=============================
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; total= 16,200
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;===================
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;===================
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; set_row_color
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@ -35,7 +35,9 @@ FILEML EQU $64
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FILEMH EQU $65
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;TURNING EQU $60
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;SCREEN_X EQU $61 ; not used?
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SCREEN_Y EQU $62
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SCREEN_Y EQU $67
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WHICH_FILE EQU $68
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;ANGLE EQU $63
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;HORIZ_SCALE_I EQU $64
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;HORIZ_SCALE_F EQU $65
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