Hand-rolling a CP/M machine
Allison
ajp166 at bellatlantic.net
Wed Apr 25 16:27:21 CDT 2007
>
>Subject: Re: Hand-rolling a CP/M machine
> From: woodelf <bfranchuk at jetnet.ab.ca>
> Date: Wed, 25 Apr 2007 15:23:36 -0600
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Ethan Dicks wrote:
>
>> With as fast as CMOS ROMs are today, why not use a 27C64 and burn your
>> own charset to it? It's not tough to do, but is there a technical
>> reason it wouldn't work?
>
>That works but to find the PROM data you have to look at some very old
>memory data books. I have yet to find any nice 8x11? fonts that fit
>in a 9x12 character block could be copied.
>
>> -ethan
Motorola, Signetics or SMC databooks from the 80s.
Or do what I did back in the hazeltine days, graph paper and a book of fonts.
Allison
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