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SHVC-2J3M-20

A chipboard containing two ROM chips, 64k of RAM and a MAD-1 decoder.

All PCB information based on a document by Overload

Supported ROM sizes

  • 10 Mbit
  • 12 Mbit
  • 16 Mbit

Supported RAM sizes

  • 64 kbit

On-board chips

Chip numberChip type
U1MASKROM P0
U2MASKROM P1
U364k SRAM
U4MAD-1
U5CIC

ROM Registration

A properly formatted internal header should have these values

Memory Address Value Explanation
FFD521H / 31HMap Mode
FFD602HCartridge Type
FFD70BHROM Size
FFD803HRAM 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
00-3F8000-FFFFROM (MIRROR)
10-1F6000-7FFFRAM (MIRROR)
30-3F6000-7FFFRAM
40-7F0000-FFFFROM
80-BF8000-FFFFROM (MIRROR)
90-9F6000-7FFFRAM (MIRROR)
B0-BF6000-7FFFRAM (MIRROR)
C0-FF0000-FFFFROM (MIRROR)

Games that use this PCB type:


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