Re: Microsoft Premium Softcard //e doesn't fit in my Apple //e!

[gids.rs@sasktel.net]

On Wednesday, February 20, 2013 11:48:21 AM UTC-6, Steven Hirsch wrote:
> On 02/20/2013 09:47 AM, gids.rs@sasktel.net wrote:

> >>>    I have one of my Freed clones running at 20Mhz :-).

> >> Yeah, Steve.  I recall that Jim Lill posted some instructions on the old
> 
> >> GEnie site for getting the card to run at 9 mHz.  I followed them, and it
> 
> >> ran at 9 mHz without a hitch.  (Probably still does.  I should be able to
> 
> >> check that out in a couple of months after I resuscitate some other
> >> things.)  In addition to the crystal change, the card had to be
> >> repopulated with the F version of the several chips.
> 
> > Has anyone ever tried upgrading a Z80+  with its far fewer chips?
> > http://apple2info.net/index.php?title=Z-80_Plus

> Unfortunately, the architecture of the traditional Softcard (of which the Z80+ 
> is a knockoff) dictates the CPU clock (which is derived from the motherboard 
> rather than an on-board oscillator).  Not much to be done about it.


That explains why my Z80+ would not work in FAST mode on the IIGS let alone with an accelerator card.
Since a 1 Mhz computer gave a 2 Mhz Z80+ card, it would have been cool to have the Z80+ run at 25 Mhz, given my IIGS is currently running at 12.5 Mhz.

Rob