1050 hard drive support
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by Rich Bramante - 12/21/2011 11:18 |
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Thank you Bill.
Here's what I have been able to cull together so far: (1) The Z80 BOOT PROM code (version 1.2 at least, which is the source listing I have) appears to probe the Winchester, for boot e.g. - try to read Winchster - check result - if error, try floppy - if ok, check Winchester label - if bad label, try floppy - if good label load system and boot??? (this part is unclear to me) (2) Not all of the v1050 CP/M BIOS versions appear to support the Winchester. Versions up to 1.1 do not appear to contain the WINCH.ASM module which I am assuming is required for support. I do not have access to version 1.2, but I see this module showing up starting in version 1.3. I would assume that with the 1.2 BOOT PROM and the 1.4 CP/M BIOS I could support the Winchester (barring any bugginess - you appear to have v2.0 of the CP/M BIOS and not sure on the BOOT PROM). What isn't clear to me at this point is how to install CP/M onto the Winchester and get the label setup so that the PROM would boot directly from the hard drive. I'd appreciate any more details you can provide when you get a chance. Thanks again! Reply |
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