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megayume_upper.spin2
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megayume_upper.spin2
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CON ' Header
'' _______ _______ _______ _______ _______ _______
'' ( | ____ ( ____ ( ___ )\ /|\ /( | ____ \
'' | () () | ( \/ ( \/ ( ) ( \ / ) ) ( | () () | ( \/
'' | || || | (__ | | | (___) |\ (_) /| | | | || || | (__
'' | |(_)| | __) | | ____| ___ | \ / | | | | |(_)| | __)
'' | | | | ( | | \_ ) ( ) | ) ( | | | | | | | (
'' | ) ( | (____/\ (___) | ) ( | | | | (___) | ) ( | (____/\
'' |/ \(_______(_______)/ \| \_/ (_______)/ \(_______/
''
'' -= SEGA MEGA DRIVE EMULATOR =-
''
VERSION_MAJOR = 1
VERSION_MINOR = 4
VERSION_RC = 0
'' Note: this sucks. not anymore.
'' Perhaps more important note: use the included build.sh.
#include "config.spin2"
CON
MAX_PATH = 255
DIRENT_MAX = 4000
EXRAM_MAX = 8*1024*1024
HEAPSIZE = 1024*8
OBJ
video : "MegaVGA"
'' A = BT3, B = BT2, C = BT1, X = BT4, Y = BT0, Z = BT5
usb : "usbnew" | ACTIVITY_LED = -1, ERROR_LED = -1, USB_BASE_PIN = USB0_BASEPIN, USB_ENABLE_OFFSET = ENABLE_PIN, USB_DMINUS_OFFSET = DM_PIN, ...
OVERLAP_MEMORY = true, ...
EMUPAD_MAX_PLAYER = 4, EMUPAD_BUILTIN_RULES = true, ...
EMUPAD_TYPE_KBD = 1, EMUPAD_TYPE_PAD = 1, EMUPAD_TYPE_PAD_3BT = 2, ...
EMUPAD_UP_BIT = 0,EMUPAD_DOWN_BIT = 1,EMUPAD_LEFT_BIT = 2,EMUPAD_RIGHT_BIT = 3, ...
EMUPAD_BT0_BIT = 9, EMUPAD_BT1_BIT = 5, EMUPAD_BT2_BIT = 4, EMUPAD_BT3_BIT = 6, ...
EMUPAD_BT4_BIT = 10, EMUPAD_BT5_BIT = 8, EMUPAD_BT6_BIT = -1, EMUPAD_BT7_BIT = -1, ...
EMUPAD_BT8_BIT = 11, EMUPAD_BT9_BIT = 7, ...
EMUPAD_KB_BT0 = $07, EMUPAD_KB_BT1 = $19, EMUPAD_KB_BT2 = $06, EMUPAD_KB_BT3 = $1B, ...
EMUPAD_KB_BT4 = $16, EMUPAD_KB_BT5 = $09, EMUPAD_KB_BT6 = 0, EMUPAD_KB_BT7 = 0, ...
EMUPAD_KB_BT8 = $2A, EMUPAD_KB_BT9 = $28
padmap: "padmap_parser"
c : "libc"
a : "fsadapter.c"
#ifdef USE_PSRAM4
exmem : "psram4drv-dualCE.spin2"
#endif
#ifdef USE_PSRAM8
exmem : "psram8drv.spin2"
#endif
#ifdef USE_PSRAM16
exmem : "psram16drv.spin2"
#endif
#ifdef USE_HYPER
exmem : "hyperdrv.spin2"
#endif
VAR
long repeatkey,repeatnext
long romsize,romfile,srmfile
long selection
long exmem_mailbox[8*3]
long exmem_struct
byte cpu_cog,z80_cog,exmem_cog
byte smdrom
byte got_parameter
byte header_buf[$100]
alignl
byte curdir[MAX_PATH+1],tmppath[MAX_PATH+1]
#ifdef INPUT_USE_PINS
alignl
long pinput_stack[32]
#endif
PUB main() | tmp, x, mirrors, tmp2
org
' allocate all the locks like some sort of maniac
mov pa,#0
rep @.lockmadness,#16
locknew pb wc
if_nc bith pa,pb
.lockmadness
' deallocate all the ones we don't want
andn pa,##STATIC_LOCKS
mov pb,#0
rep @.lockmadness2,#16
shr pa,#1 wc
if_c lockret pb
add pb,#1
.lockmadness2
end
' setup video driver
video.start($F8,$70+4,long[$20],VIDEO_MODE,VGA_BASEPIN,VGA_VSYNC,VIDEO_SUBMODE) '
' setup OPN2/PSG
coginit(HUBEXEC_NEW,long[$30],0)
'setup VDP
coginit(COGEXEC_NEW,long[$24],0)
coginit(COGEXEC_NEW,long[$28],0)
menu_vdp_init()
msgbox_simple(@"Mounting storage...")
_mount(@"/sd",c._vfs_open_sdcardx(SDCARD_CLK,SDCARD_SELECT,SDCARD_DI,SDCARD_DO))
#ifdef INPUT_USE_USB
usb.set_emupad_ptr($40)
tmp := c.fopen(@"/sd/PADMAP.TXT",@"r")
if tmp
padmap.parse(usb.get_emupad_rule_buffer(),usb.EMUPAD_MAX_RULES,@c.fgetc,tmp,@"megayume")
c.fclose(tmp)
usb.start()
#elseifdef INPUT_USE_PINS
cogspin(NEWCOG,pinput_cog(),@pinput_stack)
#endif
#ifndef DIRECT_BOOT
if USE_ARGV && long[$FC000] == ("A" + "R"<<8 + "G"<<16 + "v"<<24) && word[$FC004] <> 0
got_parameter := true
long[$FC000] := 0 ' Destroy signature
else
do_opening()
#endif
'clearplane(MENU_PLANEA)
if a.get_type_for_path(@"/sd/MEGAYUME")==1
c.strncpy(@curdir,@"/sd/MEGAYUME/",MAX_PATH)
else
c.strncpy(@curdir,@"/sd/",MAX_PATH)
'msgbox_simple(@"OK!")
'waitkey(MENUKEY_CONFIRM)
repeat
repeat
#ifdef DIRECT_BOOT
c.strncpy(@tmppath,@DIRECT_BOOT,MAX_PATH)
#else
if got_parameter
c.strncpy(@tmppath,$FC004,MAX_PATH)
got_parameter := false
elseifnot do_filechooser()
next
#endif
'msgbox_simple(@tmppath)
'waitkey(MENUKEY_CONFIRM)
case a.get_type_for_path(@tmppath)
0:
msgbox_simple(@"Path not found?")
waitkey(MENUKEY_CONFIRM)
next
1:
c.strncpy(@curdir,@tmppath,MAX_PATH)
c.strncat(@curdir,@"/",MAX_PATH)
selection := 0
next ' go for another round
2:
'msgbox_simple(@"ROM ok?")
'waitkey(MENUKEY_CONFIRM)
if open_romfile(@tmppath) < 0
msgbox_simple(@"open error")
waitkey(MENUKEY_CONFIRM)
next
'c.sprintf(@tmppath,@"Rom size: %d",romsize)
'msgbox_simple(@tmppath)
'waitkey(MENUKEY_CONFIRM)
'settile(MENU_PLANEA,0,0,"X"+ATTR_PAL2<<11)
exmem_start()
'settile(MENU_PLANEA,0,0,"L"+ATTR_PAL2<<11)
do_load_rom()
byte[$E1].[6 addbits 1] := detect_region()
byte[$50] := detect_iomode()
' remove extension from tmppath
tmp := strsize(@tmppath)
repeat while --tmp >= 0
case tmppath[tmp]
".":
tmppath[tmp] := 0
quit
"/": quit
' add SRM extnesion
c.strncat(@tmppath,@".SRM",MAX_PATH)
init_sram(@tmppath)
settile(MENU_PLANEA,0,0,"2"+ATTR_PAL2<<11)
quit
run_emulator()
if srmfile
flush_sram()
c.fclose(srmfile\0)
menu_vdp_init()
PRI run_emulator() | tmp,did_reset,did_pause,should_pause,inband_time,inband_which,inband_trig
did_pause := did_reset := should_pause := 0
exmem_stop()
bytefill(MKRAM_BASE,0,$1_0000)
bytefill(VRAM_BASE,0,$1_0000)
' setup Z80
z80_cog := coginit(HUBEXEC_NEW,long[$2C],0)
' setup 68000
cpu_cog := coginit(HUBEXEC_NEW,long[$1C],0)
inband_which := 0
repeat
if INBAND_RESET
tmp := long[$40]
if tmp.[0] and tmp.[7] ' Up+Start (Reset)
if inband_which <> 1
inband_which:=1
inband_time := getct()
#ifndef DIRECT_BOOT
elseif tmp.[1] and tmp.[7] ' Down+Start (Quit)
if inband_which <> 2
inband_which:=2
inband_time := getct()
#endif
else
inband_which:=0
if inband_which<>0 and (getct()-inband_time) > (3*clkfreq)
inband_trig := inband_which\0
else
inband_trig := 0
tmp:=((usb.keystate(usb.KEY_LCTRL)||usb.keystate(usb.KEY_RCTRL)) and usb.keystate(usb.KEY_R)) or inband_trig == 1
if tmp and not did_reset
byte[$E2] := 255
cogatn(decod cpu_cog)
did_reset:=tmp
tmp := usb.keystate(usb.KEY_PAUSE)
if tmp and not did_pause
should_pause := true
did_pause:=tmp
if should_pause and long[$F8] +< 224 ' only toggle 86k pause during active scan to avoid garbage
if byte[$E2] ^= 1
cogatn(decod cpu_cog)
should_pause := false
if ((usb.keystate(usb.KEY_LCTRL)||usb.keystate(usb.KEY_RCTRL)) and usb.keystate(usb.KEY_Esc)) or inband_trig == 2
quit
' Autosave SRAM if last write was 3 seconds ago
if srmfile and long[$E4] and (getct() - long[$E4]) >= clkfreq*3
long[$E4] := 0 ' clear first, so if we get another write while we're busy, it will still be autosaved later
flush_sram()
repeat until locktry(ROM_LOCK)
cogstop(cpu_cog)
cogstop(z80_cog)
tmp:=coginit(HUBEXEC_NEW,long[$2C],0) ' Start Z80 again so it can reset audio
waitms(1)
cogstop(tmp)
lockrel(ROM_LOCK)
PRI poll_menukeys() : keys | pad
pad := long[$40]
if {usb.keystate(usb.KEY_UP) or} pad.[0]
keys |= MENUKEY_UP
if {usb.keystate(usb.KEY_DOWN) or} pad.[1]
keys |= MENUKEY_DOWN
if {usb.keystate(usb.KEY_LEFT) or} pad.[2]
keys |= MENUKEY_LEFT
if {usb.keystate(usb.KEY_RIGHT) or} pad.[3]
keys |= MENUKEY_RIGHT
if usb.keystate(usb.KEY_PAGEUP)
keys |= MENUKEY_PGUP
if usb.keystate(usb.KEY_PAGEDOWN)
keys |= MENUKEY_PGDOWN
if {usb.keystate(usb.KEY_Enter) or} pad.[7] or pad.[5] or pad.[6]
keys |= MENUKEY_CONFIRM
if usb.keystate(usb.KEY_Esc) or {usb.keystate(usb.KEY_Bkspace) or} pad.[4]
keys |= MENUKEY_BACK
PRI open_romfile(name) : r | tmp
tmp := __builtin_alloca(512)
if romfile
c.fclose(romfile)
romfile := c.fopen(name,@"rb")
ifnot romfile
return -1
smdrom := 0
if c.fread(tmp,512,1,romfile) == 512
if long[tmp+$100] <> SEGA_FOURCC and word[tmp+8] == $BBAA
smdrom := 1
c.fseek(romfile,0,c.SEEK_END)
romsize := c.ftell(romfile)
if smdrom
romsize -= 512
c.fseek(romfile,smdrom?512:0,c.SEEK_SET)
return smdrom
PRI init_sram(srmpath) | tmp,sram_is_nvram,open_existing
' init to disabled state
bytefill(SRAM_BASE,$FF,$10000)
long[$EC] := long[$E8] := -1
long[$E4] := 0
byte[$E3] := %10
sram_is_nvram := 0
if srmfile
msgbox_simple(@"srmfile leak?")
waitkey(MENUKEY_CONFIRM)
c.fclose(srmfile\0)
tmp := @header_buf
if long[tmp+$00] == SEGA_FOURCC and word[tmp+$B0] == ("R"+"A"<<8) and byte[tmp+$B3] == $20
sram_is_nvram := byte[tmp+$B2].[6]
long[$E8] := __builtin_bswap32(long[tmp+$B4]) zerox 23 ' sram start
long[$EC] := __builtin_bswap32(long[tmp+$B8]) zerox 23 ' sram end
'' Sanity checks and hacks
if long[$EC]-long[$E8] +> $FFFF ' end before start or larger than 64k
long[$EC] := long[$E8]+$FFFF
if long[$E8] +>= $80_0000 ' header mistake (or weird thing we don't support?)
sram_is_nvram := false
long[$EC] := long[$E8] := -1
'c.sprintf(tmp,@"RAM: %08X..%08X",long[$E8],long[$EC])
'msgbox_simple(tmp)
'waitkey(MENUKEY_CONFIRM)
if long[$E8] >= romsize
byte[$E3] := %01 ' initialize to enabled state
'' open srmfile if need be
if sram_is_nvram
open_existing := a.exists(srmpath)
if open_existing
srmfile := c.fopen(srmpath,@"r+b")
ifnot srmfile
msgbox_simple(@"Failed to open save file!")
waitkey(MENUKEY_CONFIRM)
else
c.fread(SRAM_BASE,1,$1_0000,srmfile)
msgbox_simple(@"Save open OK!")
waitkey(MENUKEY_CONFIRM)
else
srmfile := c.fopen(srmpath,@"w+b")
ifnot srmfile
msgbox_simple(@"Failed to create save file!")
waitkey(MENUKEY_CONFIRM)
else
c.fwrite(SRAM_BASE,1,$1_0000,srmfile)
msgbox_simple(@"Save create OK!")
waitkey(MENUKEY_CONFIRM)
PRI flush_sram()
c.fseek(srmfile,0,c.SEEK_SET)
c.fwrite(SRAM_BASE,1,$1_0000,srmfile)
c.fflush(srmfile)
PRI detect_region() : region | chr,tmp, got, i, valid
tmp := @header_buf
if long[tmp+$00] <> SEGA_FOURCC
' No SEGA header, assume the worst
return REGION_PREFERRED
' Try parsing old style first
got := 0
valid := true
repeat i from 0 to 2
case chr:=byte[tmp][$F0+i]
"J": got.[REGION_DOMESTIC_60HZ] := true
"U": got.[REGION_OVERSEAS_60HZ] := true
"E": got.[REGION_OVERSEAS_50HZ] := true
" ": ' nothing burger
other: valid:= false
' Try parsing new style
ifnot valid
got:=-1
repeat i from 0 to 2
case chr:=byte[tmp][$F0+i]
"0".."9":
if got < 0
got := chr-"0"
valid := true
else
valid := false
"A".."F":
if got < 0
got := chr-"A"+$A
valid := true
else
valid := false
" ": ' nothing burger
other: valid:= false
if got < 0
valid := false
' got preferred 60Hz region?
if valid == 0 or got == 0 or got.[REGION_PREFERRED]
return REGION_PREFERRED
' got the other 60Hz region?
if got.[REGION_NOT_PREFERRED]
return REGION_NOT_PREFERRED
' Try PAL
if got.[REGION_OVERSEAS_50HZ]
return REGION_OVERSEAS_50HZ
return REGION_DOMESTIC_50HZ ' The nameless land named OHA...
PRI detect_iomode() : mode | ptr,serial
' detect games that don't work with 6 button pads
' or don't properly declare multitap compatibility
' by comparing serial numbers
ptr := @iomode_special_serials
repeat (@iomode_special_serials_end-@iomode_special_serials)/14
ifnot c.memcmp(@header_buf+$80,ptr,14)
return byte[ptr+14]
ptr+=15
' detect multitap support using header
if long[@header_buf+$00] == SEGA_FOURCC
ptr := @header_buf+$90
ifnot c.memcmp(ptr,@"OJKRPTBVFCA ",16)
return IOMODE_MULTITAP_3BUTTON ' Is it allowed to murder Codemasters employees?
repeat 16
if byte[ptr++] == "4"
return IOMODE_MULTITAP
return IOMODE_6BUTTON
DAT
'' Oddly, not all of the games that are listed online as being 6-button-incompatible
'' actually misbehave in emulation. Perhaps my 6 button state machine is more robust?
iomode_special_serials
byte "GM T-48036 -00",IOMODE_3BUTTON ' Ms. Pacman
byte "GM T-95026-00 ",IOMODE_3BUTTON ' Sunset Riders
byte "GM MK-1210 -00",IOMODE_3BUTTON ' Mario Lemieux Hockey
byte "GM T-48216 -00",IOMODE_MULTITAP ' Gauntlet 4
byte "GM T-48213 -00",IOMODE_MULTITAP ' Gauntlet 4 (alt)
byte "GM T-125016-00",IOMODE_MULTITAP ' The Lost Vikings
byte "GM BMAP-001-00",IOMODE_6BUTTON ' Xeno Crisis (bad multitap support)
byte "GM T-23056 -00",IOMODE_6BUTTON ' Columns 3 (bad multitap support)
byte "GM T-120096-50",IOMODE_MULTITAP_3BUTTON ' Micro Machines 2
iomode_special_serials_end
PRI do_load_rom() | tmp,x
msgbox_simple(@"Loading ROM...")
byte[$E0] := encod(romsize-1) ' Set rom size limit for lower code
exmem_fill(0,0,EXRAM_MAX,true) ' Fill entire memory with zeroes
tmp:=0
repeat
x := (tmp*25)/romsize
settiles(MENU_PLANEA,7,7+x,14,14,258+ATTR_PAL2<<11)
settiles(MENU_PLANEA,7+x+1,7+25,14,14," "+ATTR_PAL2<<11)
rom_read_block(MKRAM_BASE+tmp&$4000)
exmem_write(tmp,MKRAM_BASE+tmp&$4000,$4000,true)
if tmp==0
' Buffer ROM Header
longmove(@header_buf,MKRAM_BASE+$100,$100/4)
while (tmp+=$4000)<romsize
exmem_sync()
PRI rom_read_block(dest) | i,j,tmp1,tmp2
'' Read a 16K block of ROM data
if tmp1 := $4000 - c.fread(dest,1,$4000,romfile)
bytefill(dest+$4000-tmp1,0,tmp1)
' stupid super magic drive interleave
' adapted from: https://stackoverflow.com/a/55112294
if smdrom
i := $3FFF
org
.lp
mov j,i
.adj
shr j,#1 wc
bitnc j,#13
cmp i,j wc
if_b jmp #.adj
add i,dest
add j,dest
rdbyte tmp1,i
rdbyte tmp2,j
wrbyte tmp2,i
wrbyte tmp1,j
sub i,dest
djnf i,#.lp
end
CON
#ifdef USE_PSRAM_SLOW
PSRAM_TIMEOFFSET = 11 ' I guess???
#else
PSRAM_TIMEOFFSET = 8
#endif
PRI exmem_start() | tmp,cogs,banks
ifnot exmem_struct
exmem_struct := c.malloc(8*4+8*4+32*4)
tmp := exmem_struct
cogs := tmp+8*4
banks := cogs+8*4
if exmem_cog
return
long[tmp][0] := clkfreq
#ifdef USE_HYPER
long[tmp][1] := (HYPER_SYNC_CLOCK?0:1)<<exmem.UNREGCLK_BIT
long[tmp][2] := (HYPER_RESET < 32 && HYPER_RESET > 0) ? 1<<HYPER_RESET : 0
long[tmp][3] := HYPER_RESET >= 32 ? 1<<(HYPER_RESET-32) : 0
#elseifdef USE_PSRAM_EITHER
long[tmp][1] := (PSRAM_SYNC_CLOCK?0:1)<<exmem.UNREGCLK_BIT
#ifdef USE_PSRAM_SLOW
long[tmp][1] |= 1<<exmem.SLOWCLK_BIT | 1<<exmem.CLKSEL_BIT
#endif
long[tmp][2] := 0
long[tmp][3] := 0
if PSRAM_BANKS > 1
pinh((PSRAM_SELECT+1) addpins (PSRAM_BANKS-2))
#endif
#ifdef USE_PSRAM_EITHER
long[tmp][4] := PSRAM_BASE
#elseifdef USE_HYPER
long[tmp][4] := HYPER_BASE
#endif
long[tmp][5] := banks
long[tmp][6] := cogs
long[tmp][7] := @exmem_mailbox[0]
long[cogs][0]:=-1<<16 + %1_111<<12
longfill(cogs+4,-1<<16,7)
longfill(banks,negx,32)
#ifdef USE_PSRAM16
long[banks][0] := 512<<16 + (PSRAM_DELAY-PSRAM_TIMEOFFSET)<<13 + (PSRAM_SYNC_DATA?0:1)<<12 + 22
long[banks][16] := PSRAM_SELECT + PSRAM_CLK<<8
#elseifdef USE_PSRAM8
long[banks][0] := 256<<16 + (PSRAM_DELAY-PSRAM_TIMEOFFSET)<<13 + (PSRAM_SYNC_DATA?0:1)<<12 + 22
long[banks][16] := PSRAM_SELECT + PSRAM_CLK<<8
#elseifdef USE_PSRAM4
long[banks][0] := 128<<16 + (PSRAM_DELAY-PSRAM_TIMEOFFSET)<<13 + (PSRAM_SYNC_DATA?0:1)<<12 + 22
long[banks][16] := PSRAM_SELECT + PSRAM_CLK<<8 + PSRAM_SELECT<<16
#elseifdef USE_HYPER
long[banks][0] := 128<<16 + (HYPER_DELAY-7)<<13 + (HYPER_SYNC_DATA?0:1)<<12 + 22
long[banks][16] := HYPER_SELECT + HYPER_CLK<<8 + HYPER_RWDS<<16 + HYPER_LATENCY<<25 ' Latency????
#endif
exmem_mailbox[0] := -1
cogs := exmem.getDriverAddr()
exmem_cog := coginit(COGEXEC_NEW,cogs,tmp)+1
repeat while exmem_mailbox[0] ' wait for init so data structures can go dead
PRI exmem_stop()
if exmem_cog
exmem_sync()
cogstop((exmem_cog\0)-1)
PRI exmem_sync()
repeat while exmem_mailbox[0]
PRI exmem_write(dst,src,length,async)
exmem_sync()
exmem_mailbox[2] := length
exmem_mailbox[1] := src
exmem_mailbox[0] := exmem.R_WRITEBURST + (dst & $fffffff)
ifnot async
exmem_sync()
PRI exmem_fill(dst,val,length,async)
exmem_sync()
exmem_mailbox[2] := length
exmem_mailbox[1] := val
exmem_mailbox[0] := exmem.R_WRITEBYTE + (dst & $fffffff)
ifnot async
exmem_sync()
PRI exmem_read(dst,src,length,async)
exmem_sync()
exmem_mailbox[2] := length
exmem_mailbox[1] := dst
exmem_mailbox[0] := exmem.R_READBURST + (src & $fffffff)
ifnot async
exmem_sync()
CON
SEGA_FOURCC = ("S"+"E"<<8+"G"<<16+"A"<<24)
MENU_PLANEA = $C000
MENU_PLANEB = $E000
ATTR_PRIO = 1<<(15-11)
ATTR_PAL0 = 0<<(13-11)
ATTR_PAL1 = 1<<(13-11)
ATTR_PAL2 = 2<<(13-11)
ATTR_PAL3 = 3<<(13-11)
ATTR_FLIP = 1<<(12-11)
ATTR_MIRR = 1<<(11-11)
' These have to match lower code
VRAM_BASE = $3_0000
MKRAM_BASE = $1_0000
SRAM_BASE = $4_0000
ROM_LOCK = 7
HINT_LOCK = 8
VINT_LOCK = 9
ZINT_LOCK = 10 ' Z80 VBlank IRQ is sorta independent
STATIC_LOCKS = decod ROM_LOCK | decod HINT_LOCK | decod VINT_LOCK | decod ZINT_LOCK
#0,IOMODE_3BUTTON,IOMODE_6BUTTON,IOMODE_MULTITAP,IOMODE_MULTITAP_3BUTTON
#0,PAD_NONE,PAD_6BUTTON,PAD_3BUTTON
REGION_OVERSEAS_60HZ = %10 '' Americas
REGION_DOMESTIC_60HZ = %00 '' Japan
REGION_OVERSEAS_50HZ = %11 '' Europe, Australia
REGION_DOMESTIC_50HZ = %01 '' Narnia, Gensokyo, Oz, Bielefeld
REGION_PREFERRED = PREFER_OVERSEAS ? REGION_OVERSEAS_60HZ : REGION_DOMESTIC_60HZ
REGION_NOT_PREFERRED = PREFER_OVERSEAS ? REGION_DOMESTIC_60HZ : REGION_OVERSEAS_60HZ
MENUKEY_UP = %0000_0001
MENUKEY_DOWN = %0000_0010
MENUKEY_LEFT = %0000_0100
MENUKEY_RIGHT = %0000_1000
MENUKEYS_DIRECTIONS = %1111
MENUKEY_CONFIRM = %0001_0000
MENUKEY_BACK = %0010_0000
MENUKEY_PGUP = %0100_0000
MENUKEY_PGDOWN = %1000_0000
PRI do_opening() | y,ptr,vram
screen_reset()
ptr := @info_text_block
vram := $2800
y:=4
repeat while byte[ptr]<>127
longfill(VRAM_BASE+vram,$1111_1111,32*8)
draw_shiftjis_string(ptr,VRAM_BASE+vram,1,2,32*2)
show_shiftjis_string(vram+/32 + ATTR_PAL2<<11,32,4,y++,MENU_PLANEA)
ptr += strsize(ptr)+1
vram += 32*8*4
'repeat until poll_menukeys() & MENUKEY_CONFIRM
' repeat y from 0 to 31
' word[VRAM_BASE+MENU_PLANEA][64*24+4+y] := long[$40].[y] ? "O" : "_"
waitkey(MENUKEY_CONFIRM)
DAT ' credits/info text
info_text_block
byte " -- Ｍ ｅ ｇ ａ Ｙ ｕ ｍ ｅ --",0
byte " ＳＥＧＡ Ｍｅｇａｄｒｉｖｅ Ｅｍｕｌａｔｏｒ",0
byte " ｆｏｒ Ｐａｒａｌｌａｘ Ｐ２",0
byte "",0
'byte " ",0
'' There's a joke in here somewhere about neither ASCII nor katakana
'' being able to fully render my name, but it got lost in encoding :/
byte " Programmed by Ada Gottenstraeter / アダ・ゴテンスツレテル",0
byte " of ＩＲＱｓｏｍｅ Ｓｏｆｔｗａｒｅ non-incorporated",0
byte "",0
byte " Additional programming:",0
byte " Johannes Ahlebrand - original PSG code",0
byte " Eric Smith - flexspin compiler",0
byte " Roger Loh - external memory drivers",0
byte " Garry Jordan & Marco Maccaferri - USB driver",0
byte "",0
byte " UI fonts used: ｢Misaki Gothic 2nd｣ and ｢funscii｣",0
byte "",0
byte " This program is free software under the MIT license.",0
byte " See https://github.com/IRQsome/MegaYume for info.",0
byte " THE SOFTWARE IS PROVIDED ｢AS IS｣, WITHOUT WARRANTY OF ANY KIND.",0
byte "",0
byte " Ｈｉｔ ＣＯＮＦＩＲＭ ｋｅｙ ｔｏ ｃｏｎｔｉｎｕｅ．．．",0
byte "",0
byte 127
CON
INFO_X = 21
INFO_Y = 6
INFO_HEIGHT = 19
DIRLIST_X = 3
DIRLIST_Y = 4
DIRLIST_HEIGHT = 21
PRI do_filechooser() | keys,x,y,tmp,gotfiles,tmp2,attr,position,dirty
msgbox_simple(@"Accessing...")
gotfiles := scandir()
if gotfiles < 0
msgbox_simple(@"Directory error!!!")
waitkey(MENUKEY_CONFIRM)
return
if c.strncmp(@curdir,@"/",MAX_PATH) ' don't add updir into root dir
fileenter(@"<go up>",0,gotfiles++)
sortFiles(gotfiles)
screen_reset()
longfill(VRAM_BASE+$2800,0,32*8)
draw_shiftjis_string(@curdir,VRAM_BASE+$2800,1,2,32*2)
show_shiftjis_string($2800/32,32,DIRLIST_X,DIRLIST_Y-1,MENU_PLANEA)
if selection +>= gotfiles
selection := 0
position := 0
else
position := (selection - 2) <# (gotfiles - DIRLIST_HEIGHT) #> 0
dirty := true
repeatkey := 0
repeat while poll_menukeys() & !MENUKEYS_DIRECTIONS
repeat
if dirty\false
settiles(MENU_PLANEA,17,39,4,4," "+(ATTR_PAL0)<<11)
longfill(VRAM_BASE+$3000,$1111_1111,INFO_HEIGHT*16*8)
repeat y from 0 to INFO_HEIGHT-1
show_shiftjis_string($3000/32+y*16 + ATTR_PAL2<<11,16,INFO_X,INFO_Y+y,MENU_PLANEA)
if selection <= position
position := (selection-1) #> 0
if selection >= position+DIRLIST_HEIGHT-1
position := (selection-DIRLIST_HEIGHT+2) #> 0 <# gotfiles-DIRLIST_HEIGHT
repeat y from DIRLIST_Y to DIRLIST_Y+DIRLIST_HEIGHT-1
tmp := y-DIRLIST_Y+position
attr := tmp == selection ? ATTR_PAL1 : ATTR_PAL2
if tmp < gotfiles
tmp2:=MKRAM_BASE+tmp*12
settile(MENU_PLANEA,DIRLIST_X,y," "+attr<<11)
settile(MENU_PLANEA,DIRLIST_X+1,y,byte[tmp2++]+256+attr<<11)
repeat x from 2 to 9
settile(MENU_PLANEA,DIRLIST_X+x,y,byte[tmp2++]+attr<<11)
settile(MENU_PLANEA,DIRLIST_X+10,y,(byte[tmp2] <> " "?".":" ")+attr<<11)
repeat x from 11 to 13
settile(MENU_PLANEA,DIRLIST_X+x,y,byte[tmp2++]+attr<<11)
settile(MENU_PLANEA,DIRLIST_X+14,y," "+attr<<11)
else
settiles(MENU_PLANEA,DIRLIST_X,DIRLIST_X+14,y,y," "+(ATTR_PAL2)<<11)
ifnot gotfiles
' Does this case ever actually happen anymore?
putstring(@"No Files...",18,4,MENU_PLANEA,ATTR_PAL0)
else
case byte[MKRAM_BASE+12*selection]
0:putstring(@"Go one folder up.",INFO_X,4,MENU_PLANEA,ATTR_PAL0)
1:putstring(@"Folder",INFO_X,4,MENU_PLANEA,ATTR_PAL0)
2:
putstring(@"ROM info:",INFO_X,4,MENU_PLANEA,ATTR_PAL0)
c.strncpy(@tmppath,@curdir,MAX_PATH-12)
filegetname(@tmppath+strsize(@tmppath),selection)
if open_romfile(@tmppath) < 0
draw_shiftjis_string(@"ＯＰＥＮ ＥＲＲＯＲ？？？",VRAM_BASE+$3000+0*16*32,1,2,32)
else
rom_read_block(MKRAM_BASE+$C000)
if long[MKRAM_BASE+$C100] <> SEGA_FOURCC
draw_shiftjis_string(@"ＮＯ ＳＥＧＡ ＨＥＡＤＥＲ!!!",VRAM_BASE+$3000+0*16*32,1,2,32)
else
draw_shiftjis_string(@"Machine type:",VRAM_BASE+$3000+0*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C100,VRAM_BASE+$3000+(1*16+1)*32,1,2,16)
draw_shiftjis_string(@"Copyright:",VRAM_BASE+$3000+2*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C110,VRAM_BASE+$3000+(3*16+1)*32,1,2,16)
draw_shiftjis_string(@"Domestic name:",VRAM_BASE+$3000+4*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C120,VRAM_BASE+$3000+(5*16+1)*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C130,VRAM_BASE+$3000+(6*16+1)*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C140,VRAM_BASE+$3000+(7*16+1)*32,1,2,16)
draw_shiftjis_string(@"Overseas name:",VRAM_BASE+$3000+8*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C150,VRAM_BASE+$3000+(9*16+1)*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C160,VRAM_BASE+$3000+(10*16+1)*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C170,VRAM_BASE+$3000+(11*16+1)*32,1,2,16)
draw_shiftjis_string(@"ROM Serial:",VRAM_BASE+$3000+12*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C180,VRAM_BASE+$3000+(13*16+1)*32,1,2,16-2)
draw_shiftjis_string(@"Devices:",VRAM_BASE+$3000+14*16*32,1,2,16)
draw_shiftjis_string(MKRAM_BASE+$C190,VRAM_BASE+$3000+(15*16+1)*32,1,2,16)
draw_shiftjis_string(smdrom?@"Super Magic Drive dump":@"Raw ROM image",VRAM_BASE+$3000+16*16*32,1,2,32)
c.sprintf(@tmppath,@"ROM Size: %d",romsize)
draw_shiftjis_string(@tmppath,VRAM_BASE+$3000+(17*16+0)*32,1,2,32)
'settile(MENU_PLANEA,0,0,"0"+ATTR_PAL2<<11)
keys := poll_menukeys()
if keys & MENUKEY_BACK
repeat while poll_menukeys() & MENUKEY_BACK
tmppath[0] := 0
return false
elseif keys & MENUKEY_CONFIRM and gotfiles
repeat while poll_menukeys() & MENUKEY_CONFIRM
c.strncpy(@tmppath,@curdir,MAX_PATH-12)
if byte[MKRAM_BASE+selection*12]==0 ' got directory up?
tmp := @tmppath+strsize(@tmppath)
tmp2 := 2
repeat while tmp >= @tmppath and tmp2
if byte[tmp] == "/"
tmp2--
byte[tmp--] := 0
else
filegetname(@tmppath+strsize(@tmppath),selection)
return true
else
tmp := selection
selection := handle_menu_move(keys,selection,gotfiles-1,DIRLIST_HEIGHT)
if tmp <> selection
dirty := 1
PRI handle_menu_move(keys,current,max,pagelen) : r | tmp
tmp := 0
if ones(keys) <> 1
repeatkey := 0
return current
if repeatkey <> keys
repeatkey := keys
repeatnext := clkfreq+/2 + getct()
tmp := 1
elseif (getct()-repeatnext) >= 0
tmp := 1
repeatnext := clkfreq+/10 + getct()
ifnot tmp
return current
case encod keys
encod MENUKEY_UP:
return (current-1) #> 0
encod MENUKEY_DOWN:
return (current+1) <# max
encod MENUKEY_PGUP:
return (current-pagelen) #> 0
encod MENUKEY_PGDOWN:
return (current+pagelen) <# max
other:
return current
PRI scandir() : got | dir,tmp,type
c.strncpy(@tmppath,@curdir,MAX_PATH)
'if c.strncmp(@curdir,@"/sd/",MAX_PATH) ' if not root, remove slash for opening directory (WTF??)
' tmppath[strsize(@tmppath)-1] := 0
dir := c.opendir(@tmppath)
ifnot dir
return -1
repeat
tmp:= c.readdir(dir)
ifnot tmp
quit
ifnot type := a.get_type_for_dirent(tmp)
next
fileenter(a.get_name_for_dirent(tmp),type,got)
ifnot type == 1 or valid_rom_extension(got)
next
if ++got == DIRENT_MAX
quit
c.closedir(dir)
PRI fileenter(str,type,num) | pt
pt := MKRAM_BASE+12*num
byte[pt++] := type
repeat 8
if byte[str] == 0 || byte[str] == "."
byte[pt++] := " "
else
byte[pt++] := byte[str++]
if byte[str] == "."
str++
repeat 3
if byte[str] == 0
byte[pt++] := " "
else
byte[pt++] := byte[str++]
PRI valid_rom_extension(num) : r
if check_extension(num,"B"+"I"<<8+"N"<<16)
return true
if check_extension(num,"G"+"E"<<8+"N"<<16)
return true
if check_extension(num,"M"+"D"<<8+" "<<16)
return true
if check_extension(num,"S"+"M"<<8+"D"<<16)
return true
return false
PRI check_extension(num,ext) : r | tmp
tmp := long[MKRAM_BASE+12*num+9]&$FFFFFF
return tmp==ext || tmp==(ext|$202020)
PRI filegetname(dst,num) | pt
pt := MKRAM_BASE+12*num+1
repeat 8
if byte[pt] <> " "
byte[dst++] := byte[pt]
pt++
if byte[pt] <> " "
byte[dst++] := "."
repeat 3
if byte[pt] <> " "
byte[dst++] := byte[pt]
pt++
byte[dst] := 0
PRI sortFiles(length) : i | ip,jp,i2p,zonep,k,realsize,subsize,sizze,temp
'' Sort the Files...
temp := __builtin_alloca(12)
if length < 2 ' no need to sort if < 2 entries
return
'' Non-recursive in-place sorting algorithm
'' As relayed to me by a friendly Discord user
'' (ported to spin and optimized by me)
subsize := 12
length *= 12
repeat while subsize < length
sizze := subsize<<1
repeat i from 0 to length-12 step sizze
jp := (ip:=MKRAM_BASE+i)+subsize
realsize := sizze <# (length-i)
i2p := ip
repeat k from 0 to realsize-12 step 12
if jp => (ip+realsize) or i2p => jp
'pass
elseif compareNames(i2p,jp) =< 0
i2p += 12
else
zonep := jp
repeat
if (zonep+12) == (ip+realsize)
longmove(temp, i2p,3)
longmove(i2p,jp,3)
longmove(jp,jp+12,(zonep-jp)>>2)
longmove(zonep,temp,3)
if jp == zonep
i2p += 12
else
k -= 12
quit