You can show your appreciation through
- Patreon: https://patreon.com/jotego
- Paypal: https://paypal.me/topapate
- Github: https://github.com/sponsors/jotego
SEGA System 16 compatible verilog core for FPGA by Jose Tejada (jotego). This core was developed with the help of a SEGA System 16B model 171-5358 board lent by FunkyCochise.
Most games work correctly. Some games have problems mapping their inputs because the original arcade was not a joystick with buttons but something else hard to translate. Please check the issues section in Github.
Developer's note: encrypted games don't work if the core is compiled using the J68 CPU module for M68000.
| Game | Players | Analog | Other |
|---|---|---|---|
| Passing Shot | 4 | ||
| SDI | 1 | 2 axis | trackball |
| Sukeban | 1 | Keyboard-like | |
| Major League | 1 | 3 axis | |
| Dump Matsumoto | 1 | inputs via 8751 | |
| Ace Attack | 1 | inputs via CXD1095 |
Because of the hardware variety, there are different cores targeted for each of them
| System | Core | Logic Usage | BRAM Usage |
|---|---|---|---|
| 16A | jts16 | 22,149 | 374,458 |
| 16B i8751 | jts16b | 23,073 | 364,218 |
MiST has 608,256 memory bits and 24,624 logic elements. Although the MCU can be synthesized in MiST and SiDi, timings are usually broken and requires several runs with different seeds because the FPGA is almost full. For MiSTer it seems to always go well.
These items need double checking on the PCB
- How much shadow is created by sprite palette 3F? The core assumes a 25% attenuation
HSync (OSSC) 15.73kHz VSync (Analog Discovery) 60.042Hz Vblank: 2.427 ms (38 lines)
Crystal Oscillators (System 16B)
| Location | Freq (MHz) | Use |
|---|---|---|
| B1 | 20 | M68k |
| E12 | 8.000 | Sound |
| G1 | 25.1748 | Video |
Pixel clock: 6.2937 MHz
Estimated geometry: 400 pixels/line = 63.555us = 15.734 kHz 262 lines/frame
Core clock: 50.3496 MHz
Dividers:
| Clock | m | n |
|---|---|---|
| 25.1748 | 1 | 2 |
| 20 | 29 | 73 |
| 8 | 109 | 686 |
| Line | Destination |
|---|---|
| PA | Sound latch |
| PB3-0 | Coin lock ? |
| PB4 | Display enable |
| PB6-5 | ? |
| PB7 | Flip (pull down) |
| PC7 | Port A handshaking signal /OBF -> Sound /NMI |
| PC6 | Port A handshaking signal ACK |
| PC5-3 | Unconnected |
| PC2 | To PAL 315-5107 pin 9 (SCONT1) |
| PC1 | To PAL 315-5108 pin 19 (SCONT0) |
| PC0 | To MUTE input on MB3733 amplifier (0=sound disabled) |
| Item | Size (kB) |
|---|---|
| Main ROM | 512 |
| Main RAM | 16 |
| Object | 2 |
| Palette | 4 |
| Char | 4 |
| Scroll | 32 (?) |
You can show your appreciation through
- Patreon: https://patreon.com/jotego
- Paypal: https://paypal.me/topapate
Contact the author for special licensing needs. Otherwise follow the GPLv3 license attached.
Apart from the directors and supported shown in the core credits screen, the following patrons also supported the development of JTS16:
Adam Leslie Adam Small Adam Zorzin Adrian Labastida
Alan Shurvinton Alda Alesio Alexander Lash Alexander Upton
Alfonso Clemente Alvaro Paniagua Andrea Chiavazza Andreas Micklei
Andrew Boudreau Andrew Hannan Andrew P Gibson Andrew Schmidt
Angelfred Angelo Kanaris Anselmo Moreno Anthony Monaco
Antoine Mariette Anton Gale Antwon Aquijacks (Flashjacks
Arend Pronk Arthur Blough Arthur Fung Aurich Lawson
BRCDEvg Banane Bear S Ben Toman
Bitmap Bureau Bitmaps Retro Bliz 452 Brandon Peach
Brandon Smith Brandon Thomas Brent Fraser Brian Peek
Brian Plummer Bruno M Bryan Evans C
Cameron Tinker Carrboroman Cesar Sandoval Charles
Chris Chung Chris D Chris Mzhickteno Chris Tuckwell
Chris W Miller Chris smith Christian Bailey Clinton Cronin
Cobra Clips Colin Colehour Colt83 DARK WEB DANGer
Dan Doyle Daniel Daniel Casadevall Daniel Dongil
Daniel Fowler Daniel Page Daniel Tibi Daniel Zetterman
Darren Newman Darren Wootton Daryll David Dasutin
Dave Test David Drury David Filskov David Fleetwood
David Jones Denis Brækhus Diana Carolina Didgeridoo
Didier Touron Dimitris Zongas Dr Catjail Dr. Octagon
DrMnike Dre137 Eren Kotan Eric Gutt
Eric J Faulkes Federico Five Year Guy Florian Raoult
GeorgeSpinner Gluthecat GohanX Goolio
Grant McNaught Greg Greg Sargent Gregory Val
HFSPlay Handheld Obsession Henry Henry R
Hentai Joe Hugo Pinto ItsBobDudes JOSE LUIS
JR Jack Sammons Jacob Hoffman Jacob Lawter
James Kilgore Jeff Roberts Jeremy Hasse Jerry Suggs
Jesse Clark Jim Knowler JimLahey Jimmy Richards
Jockel Joel Albino Johan Smolinski John Figueroa
John Fletcher John Hood John Silva John T. Keen
John Wilson Johnny harvick Jonah Phillips Jonathan
Jonathan Brochu Jonathan Loor Jonathan Tuttle Joost Peters
Jootec from Jorge Jork Sonkinfield Jose L
Joseph Kulinski Joseph Milazzo Joseph Mogavero Josh Emery
Josh Mayer Josh Yates-Walker Josiah Wilson Justin D'Arcangelo
Kai Cherry Kai Luotojoki Keith Gordon Kem Yos
Ken Scott Kevin Gudgeirsson KnC KrzysFR
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Lee Osborne Luis F Giron MaDDoG Mack H
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