mirror of
https://github.com/deater/tb1.git
synced 2024-12-22 13:29:48 +00:00
snes: Initial checkin
Doesn't do anything, but it does assemble
This commit is contained in:
Vince Weaver
parent
f8f625390f
commit
fe3dddef8e
21
tb_snes/Makefile
Normal file
21
tb_snes/Makefile
Normal file
@ -0,0 +1,21 @@
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AS=cl65
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LD=ld65
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all: tb1_snes.sfc
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tb1_snes.sfc: tb1_snes.o
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$(LD) -o tb1_snes.sfc --config snes.cfg --obj tb1_snes.o
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tb1_snes.o: tb1_snes.s snes_init.s
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$(AS) -t none -o tb1_snes.o -l tb1_snes.lst -c tb1_snes.s
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#ll.tiles: ll.ans ./tools/ansi_to_tile
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# ./tools/ansi_to_tile < ll.ans > ll.tiles
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#tools/ansi_to_tile:
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# cd tools && make
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clean:
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rm -f *~ *.o *.lst *.sfc
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# cd tools && make clean
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42
tb_snes/snes.cfg
Normal file
42
tb_snes/snes.cfg
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@ -0,0 +1,42 @@
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#------------------------------------------------------------------------------
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#
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#------------------------------------------------------------------------------
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MEMORY {
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ROMST: start = $008000, size = $7fc0, type = ro, file = %O, fill = yes, define = yes;
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ROMINFO: start = $00ffc0, size = $0040, type = ro, file = %O, fill = yes, define = yes;
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ZP: start = $000000, size = $0020, type = rw, define = yes;
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RAM: start = $7e2000, size = $e000, type = rw, define = yes;
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STACK: start = $000000, size = $2000, type = rw, define = yes;
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SRAM: start = $006000, size = $2000, type = rw, define = yes;
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}
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#------------------------------------------------------------------------------
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#
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#------------------------------------------------------------------------------
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SEGMENTS {
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STARTUP: load = ROMST, type = ro, define = yes;
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CARTINFO: load = ROMINFO, type = ro, define = yes;
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RODATA: load = ROMST, type = ro, define = yes;
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DATA: load = ROMST, run = RAM,type = rw, define = yes;
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BSS: load = RAM, type = bss, define = yes;
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ZEROPAGE: load = ZP, type = zp;
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CODE: load = ROMST, type = ro, define = yes;
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}
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#------------------------------------------------------------------------------
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#
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#------------------------------------------------------------------------------
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FEATURES {
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CONDES: segment = RODATA,
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type = constructor,
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label = __CONSTRUCTOR_TABLE__,
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count = __CONSTRUCTOR_COUNT__;
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CONDES: segment = RODATA,
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type = destructor,
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label = __DESTRUCTOR_TABLE__,
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count = __DESTRUCTOR_COUNT__;
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}
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#------------------------------------------------------------------------------
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#
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#------------------------------------------------------------------------------
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#SYMBOLS {
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# __STACKSIZE__ = $0200;
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#}
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235
tb_snes/snes_init.s
Normal file
235
tb_snes/snes_init.s
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@ -0,0 +1,235 @@
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init_snes:
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; Setup All the Registers
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sei ; disable interrupts
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clc ; clear carry
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xce ; and exchange with X to enable native mode
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phk ; make data bank match program bank
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plb ;
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rep #$38 ; clear status bits, binary mode, A and IX/IY = 16
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.i16 ; tell assembler IX/IY=16bits
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.a16
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ldx #$1fff ; set the stack pointer to be 0x1fff
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txs ; move X to stack
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sep #$20 ; mem/A = 8 bit
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.a8
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lda #$8f ; put 0x8f in accumulator
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; (screen off, full brightness)
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sta $2100 ; store to brightness/screen reg
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stz $2101 ; sprite register (size+address, VRAM)
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stz $2102 ; sprite register (address in mem, OAM)
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stz $2103 ; "
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stz $2105 ; graphic mode register (mode 0)
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stz $2106 ; mosaic register (noplanes, nomosaic)
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stz $2107 ; plane 0 map VRAM location
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stz $2108 ; plane 1 map VRAM location
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stz $2109 ; plane 2 map VRAM location
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stz $210a ; plane 3 map VRAM location
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stz $210b ; plane 0+1 tile location
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stz $210c ; plane 2+3 tile location
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stz $210d ; Plane 0 scroll x (first 8 bits)
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stz $210d ; Plane 0 scroll x (last 3 bits) #$0 - #$07ff
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stz $210e ; Plane 0 scroll y (first 8 bits)
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stz $210e ; Plane 0 scroll y (last 3 bits) #$0 - #$07ff
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stz $210f ; Plane 1 scroll x (first 8 bits)
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stz $210f ; Plane 1 scroll x (last 3 bits) #$0 - #$07ff
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stz $2110 ; Plane 1 scroll y (first 8 bits)
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stz $2110 ; Plane 1 scroll y (last 3 bits) #$0 - #$07ff
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stz $2111 ; Plane 2 scroll x (first 8 bits)
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stz $2111 ; Plane 2 scroll x (last 3 bits) #$0 - #$07ff
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stz $2112 ; Plane 2 scroll y (first 8 bits)
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stz $2112 ; Plane 2 scroll y (last 3 bits) #$0 - #$07ff
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stz $2113 ; Plane 3 scroll x (first 8 bits)
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stz $2113 ; Plane 3 scroll x (last 3 bits) #$0 - #$07ff
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stz $2114 ; Plane 3 scroll y (first 8 bits)
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stz $2114 ; Plane 3 scroll y (last 3 bits) #$0 - #$07ff
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lda #$80 ; increase VRAM address after writing to $2119
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sta $2115 ; VRAM address increment register
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stz $2116 ; VRAM address low
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stz $2117 ; VRAM address high
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stz $211a ; Initial Mode 7 setting register
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stz $211b ; Mode 7 matrix parameter A register (low)
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lda #$01
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sta $211b ; Mode 7 matrix parameter A register (high)
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stz $211c ; Mode 7 matrix parameter B register (low)
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stz $211c ; Mode 7 matrix parameter B register (high)
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stz $211d ; Mode 7 matrix parameter C register (low)
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stz $211d ; Mode 7 matrix parameter C register (high)
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stz $211e ; Mode 7 matrix parameter D register (low)
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stz $211e ; Mode 7 matrix parameter D register (high)
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stz $211f ; Mode 7 center position X register (low)
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stz $211f ; Mode 7 center position X register (high)
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stz $2120 ; Mode 7 center position Y register (low)
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stz $2120 ; Mode 7 center position Y register (high)
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stz $2121 ; color # register
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stz $2123 ; bg1 & bg2 window mask reg
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stz $2124 ; bg3 & bg4 window mask reg
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stz $2125 ; obj & color mask reg
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stz $2126 ; window 1 left pos
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stz $2127 ; window 2 left pos
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stz $2128 ; window 3 left pos
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stz $2129 ; window 4 left pos
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stz $212a ; bg1,2,3,4 window logic reg
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stz $212b ; obj color win logic reg (or, and, xor, nor)
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lda #$01 ;
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sta $212c ; main screen desig (plane, sprite enable)
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stz $212d ; sub screen desig
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stz $212e ; window mask main screen
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stz $212f ; window mask sub screen
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lda #$30 ;
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sta $2130 ; color addition and screen addition
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stz $2131 ; add/sub desig for screen/sprite/color
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lda #$e0 ;
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sta $2132 ; color data for add/sub
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stz $2133 ; screen setting (interlace, x,y enable, SFX data)
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; $2134-$2136 - multiplication result, no initialization needed
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; $2137 - software H/V latch, no initialization needed
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; $2138 - Sprite data read, no initialization needed
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; $2139-$213A - VRAM data read, no initialization needed
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; $213B - Color RAM data read, no initialization needed
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; $213C-$213D - H/V latched data read, no initialization needed
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stz $213E ; $213E - might not be necesary, but selects PPU master/slave mode
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; $213F - PPU status flag, no initialization needed
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; $2140-$2143 - APU communication regs, no initialization required
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; $2180 - read/write WRAM register, no initialization required
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; $2181-$2183 - WRAM address, no initialization required
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; $4016-$4017 - serial JoyPad read registers, no need to initialize
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stz $4200 ; disable timers, v-blank interrupt, joypad register
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lda #$ff ;
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sta $4201 ; programmable i/o port
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; stz $4202 ; multiplicand A
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; stz $4203 ; multiplier B
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; stz $4204 ; multiplier C
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; stz $4205 ; multiplicand C
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; stz $4206 ; Divisor B
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stz $4207 ; Horizontal Count Timer
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stz $4208 ; Horizontal Count MSB
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stz $4209 ; Vertical Count Timer
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stz $420a ; Vertical Count MSB
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stz $420b ; General DMA enable
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stz $420c ; Horizontal DMA enable
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stz $420d ; Access cycle designation (slow/fast ROM)
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lda $4210 ; $4210 - NMI status, reading resets
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; $4211 - IRQ status, no need to initialize
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; $4212 - H/V blank and JoyRead status, no need to initialize
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; $4213 - programmable I/O inport, no need to initialize
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; $4214-$4215 - divide results, no need to initialize
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; $4216-$4217 - multiplication or remainder results, no need to initialize
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; $4218-$421f - JoyPad read registers, no need to initialize
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; $4300-$437F
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; no need to intialize because DMA was disabled above
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; also, we're not sure what all of the registers do, so it is better to leave them at
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; their reset state value
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ClearVRAM:
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pha
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phx
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php
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rep #$30 ; mem/A = 8 bit, X/Y = 16 bit
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sep #$20
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.a8
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lda #$80
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sta $2115 ; Set VRAM port to word access
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ldx #$1809
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stx $4300 ; Set DMA mode to fixed source, WORD to $2118/9
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ldx #$0000
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stx $2116 ; Set VRAM port address to $0000
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stx $0000 ; Set $00:0000 to $0000 (assumes scratchpad ram)
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stx $4302 ; Set source address to $xx:0000
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lda #$00
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sta $4304 ; Set source bank to $00
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ldx #$FFFF
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stx $4305 ; Set transfer size to 64k-1 bytes
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lda #$01
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sta $420B ; Initiate transfer
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stz $2119 ; clear the last byte of the VRAM
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plp
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plx
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pla
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ClearPalette:
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phx
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php
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rep #$30 ; mem/A = 8 bit, X/Y = 16 bit
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sep #$20
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.a8
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stz $2121
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ldx #$0100
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ClearPaletteLoop:
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stz $2122
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stz $2122
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dex
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bne ClearPaletteLoop
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plp
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plx
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;=================================
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;**** clear Sprite tables ********
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;=================================
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stz $2102 ;sprites initialized to be off the screen, palette 0, character 0
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stz $2103
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ldx #$0080
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lda #$F0
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_Loop08:
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sta $2104 ;set X = 240
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sta $2104 ;set Y = 240
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stz $2104 ;set character = $00
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stz $2104 ;set priority=0, no flips
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dex
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bne _Loop08
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ldx #$0020
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_Loop09:
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stz $2104 ;set size bit=0, x MSB = 0
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dex
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bne _Loop09
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;=====================
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;**** clear WRAM *****
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;=====================
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stz $2181 ;set WRAM address to $000000
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stz $2182
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stz $2183
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ldx #$8008
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stx $4300 ;Set DMA mode to fixed source, BYTE to $2180
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ldx #wram_fill_byte
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stx $4302 ;Set source offset
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lda #^wram_fill_byte
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sta $4304 ;Set source bank
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ldx #$0000
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stx $4305 ;Set transfer size to 64k bytes
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lda #$01
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sta $420B ;Initiate transfer
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lda #$01 ;now set the next 64k bytes
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sta $420B ;Initiate transfer
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379
tb_snes/tb1_snes.s
Normal file
379
tb_snes/tb1_snes.s
Normal file
@ -0,0 +1,379 @@
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;
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; tb1_snes.s -- Tom Bombem SNES in 65c816 Assembly v 0.1
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;
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; by Vince Weaver <vince _at_ deater.net>
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; Page zero locations
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.define EQU =
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;LOGOB EQU $FA
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;LOGOH EQU $F9
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.setcpu "65816"
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.segment "STARTUP"
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; Called at Reset (Startup) Time
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Reset:
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; Run the initialization code
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; as the hardware state is unknown at reset
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.include "snes_init.s"
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;================================
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; Get Ready to Go
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;================================
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phk ;make sure Data Bank = Program Bank
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plb
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cli ;enable interrupts
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;==============================================
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;==============================================
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; DONE INITIALIZATION
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;==============================================
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;==============================================
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start_program:
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rep #$10 ; X/Y = 16 bit
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.i16
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sep #$20 ; mem/A = 8 bit
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.a8
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rep #$10 ; X/Y = 16 bit
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.i16
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sep #$20 ; mem/A = 8 bit
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.a8
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lda #0 ; set data bank back to 0
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pha ;
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plb ;
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;===============================================
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;===============================================
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; Display to the screen
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;===============================================
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;===============================================
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;==========================
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; Setup Background
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;==========================
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lda #$04 ; BG1 Tilemap starts at VRAM 0400
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; 0000 0100
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; aaaa aass a=0000 01 << 11 = 0800
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; ss = size of screen in tiles 00 = 32x32
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sta $2107 ; bg1 src
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; 0000 0100
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; aaaa bbbb a= BG2 tiles, b= BG1 tiles
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; bbbb<<13
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lda #$04
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sta $210b ; bg1 tile data starts at VRAM 8000
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;==============
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; Load Palettes
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;==============
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.a8
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.i16
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stz $2121 ; CGRAM color-generator read/write address
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ldy #$0020 ; we only have 16 colors / 32 bytes
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ldx #$0000 ; pointer
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copypal:
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; lda tile_palette, x ; load byte of palette
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sta $2122 ; store to color generator
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inx
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dey
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bne copypal
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;=====================
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; Load Tile Data
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;=====================
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; replace with DMA!
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rep #$20 ; set accumulator/mem to 16bit
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.a16
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.i16
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lda #$4000 ;
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sta $2116 ; set adddress for VRAM read/write
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; multiply by 2, so 0x8000
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ldy #$1690 ; Copy 361 tiles, which are 32 bytes each
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; 8x8 tile with 4bpp (four bits per pixel)
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; in 2-byte chunks, so
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; (361*32)/2 = 5776 = 0x1690
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ldx #$0000
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copy_tile_data:
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lda f:tile_data, x
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sta $2118 ; write the data
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inx ; increment by 2 (16-bits)
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inx
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dey ; decrement counter
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bne copy_tile_data
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;=====================
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; Load TB_FONT Data
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;=====================
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; replace with DMA!
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; rep #$20 ; set accumulator/mem to 16bit
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;.a16
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;.i16
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; lda #$6000 ;
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; sta $2116 ; set adddress for VRAM read/write
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; ; multiply by 2, so 0xc000
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;
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; ldy #$600 ; Copy 96 tiles, which are 32 bytes each
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; ; 8x8 tile with 4bpp (four bits per pixel)
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; ; in 2-byte chunks, so
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; ; (96*32)/2 = 1536 = 0x600
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;
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; ldx #$0000
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copy_font_data:
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; lda f:tb_font, x
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; sta $2118 ; write the data
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; inx ; increment by 2 (16-bits)
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; inx
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; dey ; decrement counter
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; bne copy_font_data
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;===================================
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; clear background to linear tilemap
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;===================================
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.a16
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.i16
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clear_linear_tilemap:
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lda #$0400 ; we set tilemap to be at VRAM 0x0400 earlier
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sta $2116
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ldy #$0000 ; clear counters
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ldx #$ffff
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; store to VRAM
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; the bottom 8 bits is the tile to use
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; the top 8 bits is vhopppcc
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; vert flip, horiz flip o=priority
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; p = palette, c=top bits of tile#
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;
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; 0001 1000
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; vhop ppcc
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; so 1800 = v=0 h=0 o=0 ppp = 2
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; c=0x0
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.a16
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.i16
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|
||||
fill_screen_loop:
|
||||
|
||||
tya
|
||||
|
||||
sta $2118
|
||||
|
||||
iny
|
||||
inx
|
||||
|
||||
cpx #30
|
||||
bne no_skip
|
||||
|
||||
lda #$0
|
||||
sta $2118
|
||||
sta $2118
|
||||
|
||||
ldx #0
|
||||
|
||||
no_skip:
|
||||
|
||||
cpy #$0169 ; 30x12 = 360 = 0x168
|
||||
|
||||
bne fill_screen_loop
|
||||
|
||||
|
||||
|
||||
|
||||
; Write String to Background
|
||||
put_string:
|
||||
|
||||
lda #$05a9 ; set VRAM address
|
||||
; 0400 = upper left (0,0)
|
||||
; 0420 = (0,1)
|
||||
; 05a0 = (0,13)
|
||||
; 05a9 = (9,13)
|
||||
|
||||
sta $2116 ; set VRAM r/w address
|
||||
; 2116 = 05
|
||||
; 2117 = a9
|
||||
|
||||
ldy #$000d ; length of string
|
||||
|
||||
|
||||
ldx #$0000 ; string index
|
||||
|
||||
lda #$0200 ; clear A
|
||||
|
||||
copy_string:
|
||||
|
||||
sep #$20 ; set accumulator to 8 bit
|
||||
; as we only want to do an 8-bit load
|
||||
.a8
|
||||
lda hello_string, x ; load string character
|
||||
; while leaving top 8-bits alone
|
||||
beq done_copy_string
|
||||
|
||||
sec
|
||||
sbc #$20
|
||||
|
||||
rep #$20 ; set accumulator back to 16 bit
|
||||
.a16
|
||||
sta $2118 ; store to VRAM
|
||||
; the bottom 8 bits is the tile to use
|
||||
; the top 8 bits is vhopppcc
|
||||
; vert flip, horiz flip o=priority
|
||||
; p = palette, c=top bits of tile#
|
||||
|
||||
inx ; increment string pointer
|
||||
|
||||
bra copy_string
|
||||
done_copy_string:
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
setup_video:
|
||||
|
||||
sep #$20 ; set accumulator to 8 bit
|
||||
; as we only want to do an 8-bit load
|
||||
.a8
|
||||
.i16
|
||||
|
||||
|
||||
; Enable sprite
|
||||
; sssnnbbb
|
||||
; ss = size (8x8 in our case)
|
||||
; nn = name
|
||||
; bb = base selection, VRAM >> 14
|
||||
; lda #%00000010 ; point at 0x4000 in VRAM
|
||||
; sta $2101
|
||||
|
||||
; 000abcde
|
||||
; a = object, b=BG4 c=BG3 d=BG2 e=BG1
|
||||
; lda #%00010001 ; Enable BG1
|
||||
lda #%00000001 ; Enable BG1
|
||||
|
||||
sta $212c
|
||||
|
||||
; disable subscreen
|
||||
stz $212d
|
||||
|
||||
; abcd efff
|
||||
; abcd = 8 (0) or 16 width for BG1234
|
||||
; e = priority for BG3
|
||||
; fff = background mode
|
||||
lda #$01
|
||||
sta $2105 ; set Mode 1
|
||||
|
||||
; a000 bbbb
|
||||
; a = screen on/off (0=on), ffff = brightness
|
||||
|
||||
lda #$0f
|
||||
sta $2100 ; Turn on screen, full Brightness
|
||||
|
||||
|
||||
; lda #$81 ; Enable NMI (VBlank Interrupt) and joypads
|
||||
; sta $4200 ;
|
||||
|
||||
|
||||
main_loop:
|
||||
|
||||
; repeat forever
|
||||
; stp?
|
||||
|
||||
bra main_loop
|
||||
|
||||
|
||||
;============================================================================
|
||||
|
||||
wram_fill_byte:
|
||||
.byte $00
|
||||
|
||||
hello_string:
|
||||
.asciiz "HELLO,_WORLD!"
|
||||
|
||||
;tb_font:
|
||||
;.include "tbfont.inc"
|
||||
|
||||
.segment "BSS"
|
||||
|
||||
fx:
|
||||
.res 1
|
||||
fy:
|
||||
.res 1
|
||||
offset:
|
||||
.res 1
|
||||
tile_offset:
|
||||
.res 2
|
||||
logo_pointer:
|
||||
.res 2
|
||||
|
||||
screen_byte:
|
||||
.res 8*4 ; 8 bytes, times four
|
||||
|
||||
tile_data:
|
||||
.res 32
|
||||
tile_data2:
|
||||
.res (30*12)*32
|
||||
|
||||
output:
|
||||
.res 4096
|
||||
|
||||
.segment "CARTINFO"
|
||||
.byte "TOM BOMBEM 1 " ; Game Title
|
||||
.byte $01 ; 0x01:HiRom, 0x30:FastRom(3.57MHz)
|
||||
.byte $05 ; ROM Size (2KByte * N)
|
||||
.byte $00 ; RAM Size (8KByte * N)
|
||||
.word $0001 ; Developper ID ?
|
||||
.byte $00 ; Version
|
||||
.byte $7f, $73, $80, $8c ; Security Key ?
|
||||
.byte $ff, $ff, $ff, $ff ; Security Key ?
|
||||
|
||||
; Interrupt Vectors!
|
||||
|
||||
.word $0000 ; Native:COP
|
||||
.word $0000 ; Native:BRK
|
||||
.word $0000 ; Native:ABORT
|
||||
.word $0000 ; Native:NMI
|
||||
.word $0000 ;
|
||||
.word $0000 ; Native:IRQ
|
||||
|
||||
.word $0000 ;
|
||||
.word $0000 ;
|
||||
|
||||
.word $0000 ; Emulation:COP
|
||||
.word $0000 ;
|
||||
.word $0000 ; Emulation:ABORT
|
||||
.word $0000 ; Emulation:NMI
|
||||
.word Reset ; Emulation:RESET
|
||||
.word $0000 ; Emulation:IRQ/BRK
|
||||
|
||||
Loading…
Reference in New Issue
Block a user