This package contains the following files:

README        - You are reading it
98228ADOC.pdf - Documention of the ROM and my project.
98228A.pdf    - Schematic of the original 98228A ROM cartridge
Clone_1.pdf   - Schematic of my second Clone this is the one I put into the ROM cartridge shell
Clone_2.pdf   - Alternate using 8K x 8 EPROMs could be fit into shell if flat pack versions of 
                some of the TTL is used.
ADDRDEC.PDS   - PLDASM input file for the PLD used on clones.
ROM_16bit.bin - 16 bit image of the entire ROM.
ROM_HIGH_ODD.bin - 8 bit ROM image of the high byte suitable for use with 8K EPROMs
ROM_LOW_EVN.bin  - 8 bit ROM image of the low byte suitable for use with 8K EPROMs

Note that I have omitted the decoupleing capacitors on the schematics, for my clones I used 0.1uF
capacitors across the power pins of all the chips.         