Z80 / Z84C Swap (Doh!)

Mike Loewen mloewen at cpumagic.scol.pa.us
Mon Aug 17 14:23:53 CDT 2015

    The Executive shipped with CP/M Plus 3.0, in SSDD format.  The Osborne 
1 required a double-density option to read DD disks.  I don't recall that 
the CP/M Plus 3.0 would even run on the Osborne 1, at least not on my 
systems.  Depending on whether the double-density option is installed on 
his machine, it might require someone with a system that will write a 
single-density boot disk for him.

On Mon, 17 Aug 2015, Sean Caron wrote:

> ...
> I have a mostly working Executive ... logic is OK but the screen will roll
> when the environmental conditions are just right (probably some caps are
> getting dodgy, or a cold solder joint) ... it's usable ... I have all the
> original media and documentation; plenty of bootable floppies; I've got a
> sleeve of 5.25" blanks and I could run off a few duplicates for you ... not
> sure if these will work on the Osborne 1 ... if you're in the USA and you
> want to give some of the media from the Executive a shot, maybe I could
> help you out.
> Best,
> Sean
> On Mon, Aug 17, 2015 at 1:48 AM, drlegendre . <drlegendre at gmail.com> wrote:
>> Thanks for the input, gents..
>> Sigh.. and here I sit, yet again, with neither a logic analyzer nor a
>> decent digital scope. Unless something comes up, looks like I'll have to do
>> it the hard way, as usual - heh.
>> At least the machine doesn't have a totally scrambled brain, with the
>> correct CPU - so it will be easier to work through things, as I can at
>> least partially communicate with the hardware if needed. Well, except for
>> the lack of bootable media..
>> Anyone have a spare Z-80? Or some bootable media for the Osborne 1? I have
>> a few CP/M machines here, but I don't think any of them can write media for
>> the Osborne. Even so, I'd need a way to get the Oz disk images to the
>> machine of choice.. and that's another huge hurdle.
>> Help a brother out.. I need some bootstrap media!! ;-)

Mike Loewen				mloewen at cpumagic.scol.pa.us
Old Technology				http://q7.neurotica.com/Oldtech/

More information about the cctech mailing list