1980s_john
Experienced Member
Hi,
I have a Zenith Z-100 (Z-120 all-in-one), but it has an early boot ROM that doesn't have a memory test, and I am looking for a more recent one.
When I turn the machine on and wait for the hand prompt, typing V gives 'Version 1.2'. Typing T just gives a beep, I understand later versions have a memory test.
Looking at photos I think the boot ROM is a 27128 EPROM so should be easy to dump to a file using an EPROM programmer. I don't know if the EPROM is in the memory space in either CP/M (8085) or ZDOS/MSDOS (8088 ) mode.
I have an EPROM programmer so can help reading ROMs of any UK owners.
Regards,
John
I have a Zenith Z-100 (Z-120 all-in-one), but it has an early boot ROM that doesn't have a memory test, and I am looking for a more recent one.
When I turn the machine on and wait for the hand prompt, typing V gives 'Version 1.2'. Typing T just gives a beep, I understand later versions have a memory test.
Looking at photos I think the boot ROM is a 27128 EPROM so should be easy to dump to a file using an EPROM programmer. I don't know if the EPROM is in the memory space in either CP/M (8085) or ZDOS/MSDOS (8088 ) mode.
I have an EPROM programmer so can help reading ROMs of any UK owners.
Regards,
John
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