Toaplan Version 2 FPGA Implementation

FPGA compatible core of Toaplan Version 2 arcade hardware for MiSTerFPGA based on work by Pramod Somashekar. Without his extensive work on the GP9001, none of this would be possible.

FPGA implementation will reference Knuckle Bash (TP-023) schematics and will be verified against Dogyūn!! (TP-022), Knuckle Bash (TP-023), Tatsujin Ō (TP-024), FixEight (TP-026) and Batsugun (TP-030).

The intent is for this core to be a 1:1 playable implementation of Toaplan V2 hardware. Currently in alpha state, this core is in active development by atrac17 with assistance from Darren Olafson (Time Permitting).

The development process for this core will take time, understand that we have other obligations and active projects outside of the Toaplan V2 hardware.

Supported Games

Title	PCB Number	Encrypted Program	MCU	MCU Usage	Status	Released
Teki Paki	TP-020	No	HD647180	Audio	Pending	No
Ghox	TP-021	No	HD647180	Audio & I/O	Pending	No
Dogyūn!!	TP-022	Yes	NEC V25	Audio	Pending	No
Knuckle Bash	TP-023	Yes	NEC V25	Audio	Pending	No
Tatsujin Ō	TP-024	No	None	N/A	Implemented	Beta 20220902
Whoopee!!	TP-025	No	None	N/A	W.I.P	No
FixEight	TP-026	No	NEC V25	Audio & I/O	Pending	No
V-V	TP-027	Yes	NEC V25	Audio	Pending	No
Batsugun	TP-030	No	NEC V25	Audio	Pending	No
Otenki Paradise: Snow Bros. 2	TP-033	No	None	N/A	Implemented	Beta 20220904

External Modules

Name	Purpose	Author
fx68k	Motorola 68000 CPU	Jorge Cwik
t80	Zilog Z80 CPU	Daniel Wallner
jt51	Yamaha YM2151	Jose Tejada
jt6295	OKI MSM6295	Jose Tejada
jtopl2	Yamaha OPL 2	Jose Tejada
jtframe	FPGA Framework	Jose Tejada; modified by Pramod Somashekar
GP9001	Toaplan Graphics ASIC	Pramod Somashekar

Known Issues / Tasks

• Reference TP-023 schematics and compare variations with TP-024 PCB [Task]
• Verify clock domains for TP-024 [Task]
• Verify PCM and OPM levels on TP-024 [Task]
• 94.5 MHz Integer PLL for clocks [Task]
• Update clocking for 94.5Mhz PLL [Task]
• Add volume toggles for ADPCM and OPM audio [Task]
• Add volume toggles to disable ADPCM and OPM audio [Task]
• Additional scanline options for scandoubler [Task]
• Add 31kHz toggle for hi-res CRT [Task]
• Add Truxton II - Tatsujin Oh [New Version] as an alternate [Request]
  
  
• Trace TP-024 to find is_vb for spriteram; not written at the start of vblank TP-024 [Issue]
• Verify sprite lag priority for TP-024; currently 2 frames [Issue]
• Screen tearing with vertical scrolling on 240p with 31kHz toggle; if enabled screen tearing is fixed TP-033 [Issue]
• Sprite warping of player due to instable timings TP-024 [Issue]
• Audio drift; occurs on TP-024 and TP-033 (Reference clk implementation / CPU writes) [Issue]
• Analog screen flip shifts one row of pixels TP-024 [Issue]
• Analog screen flip cuts one row of pixels TP-024 / TP-033 [Issue]
• Sprite flicker on enemies TP-024 [Issue]
• Sprite flicker on left side TP-024 [Issue]

PCB Check List

Clock Information

H-Sync	V-Sync	Source	Title
15.625kHZ	59.637404	DSLogic +	Tatsujin Ō

Crystal Oscillators

Location	Freq (MHz)	Use	PCB Number
X1	16.000 MHz	M68000 / OKI MSM6295	TP-024
X1	27.000 MHz	GP9001 / YM2151	TP-033
X2	27.000 MHz	GP9001 / YM2151	TP-024
X2	16.000 MHz	M68000 / OKI MSM6295	TP-033
X3	32.000 MHz	Not Utilized on TP-033	TP-033

Pixel clock: 6.75 MHz

Estimated geometry:

432 pixels/line  

262 lines/frame  

Main Components (Board Dependent)

Location	Chip	Use	PCB Number
U 90	Motorola 68000 CPU	Main CPU	TP-024
U 57	Motorola 68000 CPU	Main CPU	TP-033
U 53	Yamaha YM2151	OPM Sound	TP-024
U 29	Yamaha YM2151	OPM Sound	TP-033
U 20	OKI MSM6295	ADPCM Sound	TP-024
U 30	OKI MSM6295	ADPCM Sound	TP-033

Custom Components (Board Dependent)

Location	Chip	Use	PCB Number
U 67	GP9001	Graphics VDP	TP-024
U 18	GP9001	Graphics VDP	TP-033

Additional Components (Board Dependent)

Location	Chip	Use	PCB Number
N/A	Zilog Z80 CPU	Sound CPU
N/A	NEC V25	Sound CPU & I/O Handling
N/A	HD647180X	Sound CPU & I/O Handling
N/A	GP9001	Second Graphics VDP

Core Features

• TBD, beta implementation.

PCB Information

• TBD, beta implementation.

Control Layout

• TBD, beta implementation.

Keyboard Handler

• Keyboard inputs mapped to mame defaults for all functions up to the third player which is not listed below.

Services	Coin/Start
Functions Keymap Test F2 Reset F3 Service 9 Pause P	Functions Keymap P1 Start 1 P2 Start 2 P1 Coin 5 P2 Coin 6

Player 1	Player 2
Functions Keymap P1 Up Up P1 Down Down P1 Left Left P1 Right Right P1 Bttn 1 L-CTRL P1 Bttn 2 L-ALT P1 Bttn 3 Space	Functions Keymap P2 Up R P2 Down F P2 Left D P2 Right G P2 Bttn 1 A P2 Bttn 2 S P2 Bttn 3 Q

Acknowledgments

Pramod Somashekar for his extensive work on the GP9001, Raizing FPGA implementation, general knowledge, and assistance with implementing Tatsujin Ō.

Jose Tejada for his extensive work on FPGA modules utilized in this implementation, general knowledge, and assistance over the last two years.

@90s_cyber_thriller for loaning all Toaplan V2 hardware used in the development process.

Support

Please consider showing support for this and future projects by contributing to the developers. While it isn't necessary, it's greatly appreciated.

atrac17's Patreon
Darren Olafson's Ko-fi

License

Contact the author(s) for special licensing needs. Otherwise follow the GPLv3 license attached.