README.txt

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)