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SHVC-1A5B-01

A board that has one ROM chip, a 74LS139 decoder and 256k of RAM.

All PCB information based on a document by Overload

Supported ROM sizes

  • 2 Mbit
  • 4 Mbit
  • 8 Mbit
  • 16 Mbit

Supported RAM sizes

  • 256 kbit

On-board chips

Chip numberChip type
U1MASKROM
U2256k SRAM
U374LS139
U4CIC

ROM Registration

A properly formatted internal header should have these values

Memory Address Value Explanation
FFD520H / 30HMap Mode
FFD602HCartridge Type
FFD708H ~ 0BHROM Size
FFD805HRAM Size

Memory Mapping

In order to get a game to work properly on an emulator, the following mapping should be used for this PCB.

Bank Address Usage
00-1F8000-FFFFROM
70-7F0000-FFFFRAM
80-9F8000-FFFFROM (MIRROR)
F0-FF0000-FFFFRAM (MIRROR)

Games that use this PCB type:


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