https://github.com/insidegadgets/Gameboy-MBC5-MBC1-Hybrid

Gameboy CPLD implementation of MBC5/MBC1 Hybrid
https://github.com/insidegadgets/Gameboy-MBC5-MBC1-Hybrid

Last synced: 2 months ago
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Gameboy CPLD implementation of MBC5/MBC1 Hybrid

• Host: GitHub
• URL: https://github.com/insidegadgets/Gameboy-MBC5-MBC1-Hybrid
• Owner: insidegadgets
• Created: 2018-08-12T05:04:54.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2023-05-17T01:51:57.000Z (about 1 year ago)
• Last Synced: 2024-01-23T11:49:36.131Z (5 months ago)
• Language: C
• Homepage: https://shop.insidegadgets.com/product/gb-2mb-128kb-sram-flash-cart/
• Size: 208 KB
• Stars: 45
• Watchers: 4
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.txt

Lists

• awesome-gbdev - Gameboy-MBC5-MBC1-Hybrid - CPLD implementation of a MBC5/MBC1 Hybrid cartridge. (Documentation / Cartridges)
• awesome-gb-dev-zh - game boy-MB C5-MB C1-Hybrid - 一个 MBC5/MBC1 混合弹药筒的 CPLD 实现。 (证明文件 / 子弹)

README

        
Gameboy MBC5/MBC1 Hybrid

Author: Alex from insideGadgets (www.insidegadgets.com)

Created: 18/04/2018

Last Modified: 20/09/2018

License: CC-BY-NC

Check out the different firmware releases to see what differences they offer:

2MB ROM, 128KB SRAM Cart

------------------------

Firmware R1:

MBC1 support is limited to 512KB ROM / 8 KBytes RAM, it’s locked in “ROM Banking Mode” but without the 2MB ROM support.

Firmware R1.1:

MBC1 support now allows for ROM banking mode to 2MB but for RAM banking mode it's locked to 8KB RAM.

Firmware R2:

Allows this cart to be a Multi-Game Cart when you run our loader software (Multi-Game Cart Maker v1.0), drag & drop your ROM files to the executable, then write the output ROM file to the cart. It consumes 20mA more than R1 and about 10-20% of games run through the Multi-Game loader may not work. You can still run the cart as a regular Flash cart but once again it will consume 20mA more.

MBC1 support is limited to 512KB ROM / 8 KBytes RAM, it’s locked in “ROM Banking Mode” but without the 2MB ROM support.

Firmware R2.1:

Like R2 but now CPLD is set to MBC5 by default without any MBC1/3 detection code. Use the loader to switch the CPLD to MBC1 or MBC3.

Won't work on GB 2MB 128KB SRAM Flash Cart without modifications.

2MB ROM, 32KB FRAM Cart

-----------------------

Firmware R1:

MBC1 support is limited to 512KB ROM / 8 KBytes RAM, it’s locked in “ROM Banking Mode” but without the 2MB ROM support.

Note: Having some MBC1 support may break a few MBC5 games.

Our MBC5 implementation differs from the standard, switching to bank 0 gives bank 1 like in MBC1/3.

CPLD: EPM3064ATC44-10N

Programmer: Altera USB Blaster Rev. c (from Ebay)

Programmed using: Quartus II 13.0sp1 (64-bit) Web Edition

Simulation: ModelSim-Altera 10.1d (Quartus II 13.0sp1)