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beebtrk2.6502
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\ ******************************************************************
\ * Beeb Tracker
\ * Volume 2 - Ninja Gaiden Edition
\ * Music player & visualiser in MODE 7
\ * Kieran Connell & Simon Morris
\ * A Bitshifters Production
\ ******************************************************************
\\ Common global defines
INCLUDE "lib/bbc.h.6502"
\ ******************************************************************
\ * Define compilation flags
\ ******************************************************************
CODE_ORIGIN = &1100 ; assuming standard BBC Micro DFS this is safe!
_DEBUG = FALSE ; include extra stuff for debugging
COMPILE_OPTION_EXIT = FALSE ; enable "Exit" in selection menu
\ ******************************************************************
\ * Define global constants
\ ******************************************************************
\ ******************************************************************
\ * Define app constants
\ ******************************************************************
\\ Number of entries in our file table
NUM_vgm_files = 17
\ ******************************************************************
\ * Define fast (zero page) runtime variables
\ ******************************************************************
\\ Our own app variables
ORG &00
GUARD &9F ; user ZP + econet ZP
\\ Any includes here can declare ZP vars from the pool using SKIP
INCLUDE "lib/exomiser.h.6502"
INCLUDE "lib/vgmplayer.h.6502"
INCLUDE "lib/beebtracker.h.6502"
\ ******************************************************************
\ * Start address to be saved
\ ******************************************************************
LARGEST_VGM_SIZE = 20560 - 266 ; less size of splash screen "loader_volume2.bin.exo"
ORG CODE_ORIGIN ; code origin - assume standard BBC Micro
GUARD MODE7_base_addr-LARGEST_VGM_SIZE ; ensure code size plus size of largest VGM file doesn't hit start of screen memory
.start
\ ******************************************************************
\ * Code entry
\ ******************************************************************
INCLUDE "lib/exomiser.s.6502"
INCLUDE "lib/vgmplayer.s.6502"
INCLUDE "lib/beebtracker.s.6502"
\ ******************************************************************
\ * Main loop including high-level state machine
\ ******************************************************************
.main
{
\\ ***** System initialise ***** \\
\\ *FX 200,3 - clear memory on break as we use OS memory areas and can cause nasty effects
LDA #200
LDX #3
JSR osbyte
JSR clear_vram
\\ Set MODE 1
LDA #22: JSR oswrch
LDA #1: JSR oswrch
\\ Turn off cursor by directly poking crtc
SEI
LDA #10: STA &FE00
LDA #32: STA &FE01
CLI
\\ Present intro screen
JSR show_title
\\ Set MODE 7
LDA #22: JSR oswrch
LDA #7: JSR oswrch
\\ Turn off cursor by directly poking crtc
SEI
LDA #10: STA &FE00
LDA #32: STA &FE01
CLI
\\ Present intro screen
JSR show_intro
\\ Run the tracker demo
JSR tracker_main
\\ ***** Exit app entirely ***** \\
\\ Credits / Outro screen goes here \\
\\ Exit cleanly - tidy up anything else here!
LDA #12: JSR oswrch
\\ Would be nice to clear escape state and issue BASIC NEW to avoid "Bad Program" error
.return
RTS
}
\\ *** Show loading screen ***
.show_intro
{
LDA#&81:LDX#100:LDY#0:JSR osbyte
LDA #19:LDX #0:JSR osbyte
SEI:LDA #6:STA &FE00:LDA #0:STA &FE01:CLI
\\ Initialize compressed data stream
\\ the title screen is an included binary at the VGM_stream_data memory address
\\ (later overwritten by loaded VGMs)
LDX #LO(VGM_stream_data)
LDY #HI(VGM_stream_data)
JSR exo_init_decruncher
\\ unpack to screen
LDX #&00
LDY #&7c
JSR exo_unpack
LDA #19:LDX #0:JSR osbyte
LDA #6:STA &FE00:LDA #25:STA &FE01
\\ wait for keypress within 2 secs
LDA#&81:LDX#200:LDY#0:JSR osbyte
RTS
}
TITLE_LOAD_ADDRESS = &8000 - 8946 ; length of compressed title screen
.show_title
{
\\ conceal vram while we load & unpack
SEI
; LDA #1: STA &FE00
; LDA #0: STA &FE01
LDA #6:STA &FE00:LDA #0:STA &FE01
CLI
\\ Set osfile param block
LDA #LO(title_data_filename)
STA osfile_params + 0
LDA #HI(title_data_filename)
STA osfile_params + 1
LDA #LO(TITLE_LOAD_ADDRESS)
STA osfile_params + 2
LDA #HI(TITLE_LOAD_ADDRESS)
STA osfile_params + 3
LDA #0
STA osfile_params + 6
\\ Issue osfile call
LDX #LO(osfile_params)
LDY #HI(osfile_params)
LDA #&FF
JSR osfile
\\ Initialize compressed data stream
LDX #LO(TITLE_LOAD_ADDRESS)
LDY #HI(TITLE_LOAD_ADDRESS)
JSR exo_init_decruncher
\\ unpack to screen
LDX #&00
LDY #&30
JSR fancy_exo_unpack ;exo_unpack
\\ wait for keypress within 5 secs
LDA#&81:LDX#0:LDY#2:JSR osbyte
LDA #19:LDX #0:JSR osbyte
LDA #6:STA &FE00:LDA #0:STA &FE01
JSR clear_vram
RTS
}
.fancy_exo_unpack
{
STX write_chr+1
STY write_chr+2
LDA #0:STA linereveal
.next_chr
INC bytecounter+0
BNE skiphi
INC bytecounter+1
.skiphi
LDA bytecounter+1
CMP #HI(640)
BNE notyet
LDA bytecounter+0
CMP #LO(640)
BNE notyet
INC linereveal
LDA #19:JSR osbyte
LDA #6:STA &FE00:LDA linereveal:STA &FE01
LDA #0:STA bytecounter:STA bytecounter+1
.notyet
JSR exo_get_decrunched_byte
BCS all_done
.write_chr STA &ffff ; **SELF-MODIFIED**
INC write_chr+1
BNE next_chr
INC write_chr+2
BNE next_chr
.all_done
LDA #6:STA &FE00:LDA #32:STA &FE01
RTS
.linereveal EQUB 0
.bytecounter EQUW 0
}
\\ reset all memory from &3000 to &8000 to zero
\\ hides unsightly mode switches
.clear_vram
{
sei
lda #&30
sta loop2+2
lda #0
ldy #&50
.loop
ldx #0
.loop2
sta &3000,x
inx
bne loop2
inc loop2+2
dey
bne loop
cli
rts
}
.code_end
\ ******************************************************************
\ * Stored data
\ ******************************************************************
.data_start
.menu_data_filename EQUS "BeebDat", 13
.title_data_filename EQUS "Title", 13
\\ Need to put this macro last as I don't know how to undo the character map!
\\
SET_TELETEXT_FONT_CHAR_MAP
\\ Scrolltext messages stored as font glyph byte offsets
.scrolltext_start
.demo_message
EQUS " Welcome to the Bitshifters Ninja Gaiden BeebTracker Demo... 17 awesome VGM chiptune music files ported from Sega Master System to your BBC Micro. They have been retuned to 4Mhz and resampled at 50Hz"
EQUS " so can be played back on your SN76489 sound chip. Enjoy the soundtrack! Press Escape to bring up the menu. Use the up and down arrow keys and return to select a new track."
EQUS " Released at the ABUG South Meet Up in Cambridge on 27 August 2016. This production was brought to you by Kieran and Henley. Find the full source to this demo and more at bitshifters.github.io. Come join the Collective...! "
EQUB 0
.load_message
EQUS "Loading... ", 0
\\ ** ANY EQUS LINES AFTER THIS POINT WILL STILL CONTAIN REMAPPED CHARACTERS ** \\
.scrolltext_end
\\ Clear character mappings
RESET_MAPCHAR
\ ******************************************************************
\ * EXO VGM data file
\ * This must be compressed using the following flags:
\ * exomizer.exe raw -c -m 1024 <file.raw> -o <file.exo>
\ ******************************************************************
.VGM_stream_data
INCBIN "data/loader_volume2.bin.exo"
\ ******************************************************************
\ * End address to be saved
\ ******************************************************************
.end
ORG &0900
GUARD &0CFF
.menu_data_start
\\ No longer require loading_table but each entry must be exactly 4 bytes
\\ Does not have to be aligned but entries have to be fixed size
\\ This isn't actually any smaller than using pointer tables but fewer things to type I suppose :)
\\ V.B is an invalid filename for some reason with BeebASM
.vgm_filenames
EQUS "V.0", 13
EQUS "V.1", 13
EQUS "V.2", 13
EQUS "V.3", 13
EQUS "V.4", 13
EQUS "V.5", 13
EQUS "V.6", 13
EQUS "V.7", 13
EQUS "V.8", 13
EQUS "V.9", 13
EQUS "V.A", 13
EQUS "V.C", 13
EQUS "V.D", 13
EQUS "V.E", 13
EQUS "V.F", 13
EQUS "V.G", 13
EQUS "V.H", 13
\\ No longer require pointer table but each entry must be exactly 32 bytes
\\ Does not have to be aligned but entries have to be fixed size
\\ Code to multiple by 32 probably takes up as much space as the previous pointer tables!
.menu_entries
EQUS " 1. Intro "
EQUS " 2. Title Screen "
EQUS " 3. Story "
EQUS " 4. Level Start "
EQUS " 5. Escape In a Forest "
EQUS " 6. Boss "
EQUS " 7. Pursuit In Tokyo "
EQUS " 8. Samurai in Tsutenkaku "
EQUS " 9. Rescue Geisha "
EQUS "10. The Land of Enemy "
EQUS "11. Raid "
EQUS "12. Overcome "
EQUS "13. A Decisive Battle "
EQUS "14. End Credits "
EQUS "15. Death "
EQUS "16. Continue "
EQUS "17. Game Over "
IF COMPILE_OPTION_EXIT
EQUS "Exit "
ENDIF
.menu_entries_end
.menu_data_end
\ ******************************************************************
\ * Print out code & data metrics
\ ******************************************************************
D_MENU_SIZE = menu_data_end-menu_data_start
D_LOOKUP_SIZE = lookup_tables_end-lookup_tables_start
D_NOTES_SIZE = note_tables_end-note_tables_start
D_SCROLLTEXT_SIZE = scrolltext_end-scrolltext_start
D_SCREENS_SIZE = mode7_data_end-mode7_data_start
D_EXO_CODE_SIZE = exo_end-exo_start
D_VGM_PLAYER_CODE_SIZE = vgm_player_end-vgm_player_start
D_MENU_ENTRIES_SIZE = menu_entries_end-menu_entries
PRINT "------------------------------------------------------------"
PRINT "Code origin = ", ~CODE_ORIGIN
PRINT "Code size =", end-start-D_MENU_SIZE-D_LOOKUP_SIZE-D_NOTES_SIZE-D_SCROLLTEXT_SIZE-D_SCREENS_SIZE
PRINT " menu data size =",D_MENU_SIZE
PRINT " menu entries size =",D_MENU_ENTRIES_SIZE
PRINT " lookup tables size =",D_LOOKUP_SIZE
PRINT " note tables size =",D_NOTES_SIZE
PRINT " scrolltext size =",D_SCROLLTEXT_SIZE
PRINT " MODE 7 screen size =", D_SCREENS_SIZE
PRINT " VGM Player code size = ", D_VGM_PLAYER_CODE_SIZE
PRINT " EXO code size = ", D_EXO_CODE_SIZE
PRINT "Run-time vars (above origin) =", VGM_stream_data-end
PRINT "------------------------------------------------------------"
PRINT "Total size (disk) =", end-start
PRINT "Total size (code + data + vars above origin) =", VGM_stream_data-start
PRINT "Available memory (above origin) =", &7C00 - CODE_ORIGIN
PRINT "Max song size =", &7C00 - VGM_stream_data
PRINT "------------------------------------------------------------"
\ ******************************************************************
\ * Save the code
\ ******************************************************************
SAVE "!Boot", start, end, main
SAVE "BeebDat", menu_data_start, menu_data_end
PUTFILE "vgm_ng/Ninja Gaiden - 01 - Intro.raw.exo", "V.0", 0
PUTFILE "vgm_ng/Ninja Gaiden - 02 - Title Screen.raw.exo", "V.1", 0
PUTFILE "vgm_ng/Ninja Gaiden - 03 - Story.raw.exo", "V.2", 0
PUTFILE "vgm_ng/Ninja Gaiden - 04 - Level Start.raw.exo", "V.3", 0
PUTFILE "vgm_ng/Ninja Gaiden - 05 - Escape in a Forest.raw.exo", "V.4", 0
PUTFILE "vgm_ng/Ninja Gaiden - 06 - Boss.raw.exo", "V.5", 0
PUTFILE "vgm_ng/Ninja Gaiden - 07 - Pursuit in Tokyo.raw.exo", "V.6", 0
PUTFILE "vgm_ng/Ninja Gaiden - 08 - Samurai in Tsutenkaku.raw.exo", "V.7", 0
PUTFILE "vgm_ng/Ninja Gaiden - 09 - Rescue Geisha.raw.exo", "V.8", 0
PUTFILE "vgm_ng/Ninja Gaiden - 10 - The Land of Enemy.raw.exo", "V.9", 0
PUTFILE "vgm_ng/Ninja Gaiden - 11 - Raid.raw.exo", "V.A", 0
PUTFILE "vgm_ng/Ninja Gaiden - 12 - Overcome.raw.exo", "V.C", 0
PUTFILE "vgm_ng/Ninja Gaiden - 13 - A Decisive Battle.raw.exo", "V.D", 0
PUTFILE "vgm_ng/Ninja Gaiden - 14 - End Credits.raw.exo", "V.E", 0
PUTFILE "vgm_ng/Ninja Gaiden - 15 - Death.raw.exo", "V.F", 0
PUTFILE "vgm_ng/Ninja Gaiden - 16 - Continue.raw.exo", "V.G", 0
PUTFILE "vgm_ng/Ninja Gaiden - 17 - Game Over.raw.exo", "V.H", 0
PUTFILE "data/ninja_gaiden.bin.exo", "Title", 0
PUTFILE "beebtrk2.md", "README", 0
IF _DEBUG ; only needed for debug purposes
PUTFILE "data/screen3.mode7", "screen", &7C00
PUTFILE "data/font_5x5.mode7", "font", &7C00
PUTFILE "data/font_5x5_shifted.mode7", "font2", &7C00
PUTFILE "data/menu_overlay.mode7", "menu", &7C00
ENDIF