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TRS-80 Model II/16 Z80 CPU Board ROM

It would seem that every processor board I find has a different ROM on it! It seems that the early ROMs don't boot directly from a hard drive. But there seems to be many versions of ROMs. I've placed them in order of serial number in the list below. There also appears to be at least two board revisions, "C" and "D".

cpu_c8ff.bin/hex:

Mask Programmable PROM, Equivilant to Intel 2716 EPROM, with checksum C8FF came from a cpu board with serial number 120353 out of a Model II with serial number 2002102 and catalog number 26-6002. The board was labeled, "Revision C". This appears to be an early ROM and according to a very helpful fellow collector, Aaron in Australia, doesn't allow boot directly from a hard disk.

cpu_9733.bin/hex:

An actual SGS-Ates (Now STMicroelectronics) 2716 EPROM, with checksum 9733 came from a cpu board with serial number 161993 out of a pile of random cards that I have. I don't know what machine it originated from. The board was labeled, "Revision C". This appears to be a later ROM in that it is able to boot directly from an 8MB hard disk. The EPROM had a windows sticker on it labeled, "U54".

cpu_2119.bin/hex:

An actual Texas Instruments 2716 EPROM, with checksum 2119 came from a cpu board with serial number 178892 out of a Model 16 with serial number 64014509 and catalog number 26-4002. The board was labeled, "Revision D". This appears to be a later ROM and does appear to allow boot directly from an 8MB hard disk.

cpu_2bff.bin/hex:

Mask Programmable PROM, Equivilant to Intel 2716 EPROM, with checksum 2BFF came from a cpu board with serial number 187173 our of a pile of random cards that I have. I don't know what machine it originated from. The board was labeled, "Revision D". This appears to be a later ROM in that it is able to boot directly from an 8MB hard disk.

David J. Cooper
Edit: Email hidden. Removed by Dullaron. Sorry.
10/24/2008

/Edit.

Look like MESS team already have these. ROM's been added to the sets by using the clrmamepro. But the others didn't get added. Probably don't need. I have all saved just in case.

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W11 Home 64-bit + Nobara OS / AMD Radeon RX 5700 XT / AMD Ryzen 7 3700X 8-Core 3.59 GHz / RAM 64 GB

Edited by Dullaron (12/06/12 06:47 AM)