G-1010 — Star Jacker

The board inside Star Jacker, photographed front and back — as sold by John Sands.

This Cartridge PCB uses one ROM from TOSHIBA named TMM23256P. This chip is a Mask Read Only Memory with a low bit cost most suitable for use in character generator.

Its built in memory matrix has 32,768 x 8bit word, which means 32 Kbytes of data available. It has two separate row and column decoders which are interfaced to the memory cell array.

There are two separate buffers for input and output data driven by a controller with a clock signal.

The Star Jacker cartridge, as sold by John Sands — Star Jacker as it was sold — John Sands

Here there are the graphic tiles relative to different game stages/screens stored on ROM:

Graphics stored in the ROM of Star Jacker

Datasheets

The chips on these boards, as their makers described them.

TMM23256P