Date   : Tue, 05 Mar 1991 14:56:49 GMT
From   : milton!ogicse!pdxgate!parsely!percy!qiclab!techbook!fzsitvay@beaver.cs.washington.edu (Frank Zsitvay)
Subject: Re: Kermit terminal emulation for CP/M

In article <kJB0X1w163w@ijpc.UUCP> ianj@ijpc.UUCP (Ian Justman) writes:
>> 
>> Also, has anyone tried the MS/DOS CP/M emulators on an Apple PC Transporter?
>
>As far as the PCT is concerned, it would STILL be too slow
>because the PCT uses a 10 MHz V20 which makes the Apple a turbo
>XT.  You could run Z80MU, but your effective speed would be
>around 500kHz to 1MHz, so you'd be better off using a 386SX.  And
>anything that takes advantage of the V20's hardware emulation
>will let you use 8080/8085 stuff ONLY, which I think is too
>limited, and what's worse is that I've heard is that the hardware
>emulation is buggy.

  z80mu on a 20mhz 286 gives you about a 2.5 mhz z80, which is not badd
all things considered.
 
  you would be surprised at how much cp/m stuff is written for the 8080/8085
instruction set.  some z80 machines had problems with the extra z80 registers
because the bios would assume the machine was going to be used like
an 8080.
 
  running z80mu on a machine like a 386sx is rather pointless, especially
if you end up purchasing the machine solely to run cp/m stuff.  even though
i have z80mu, i rarely use it because it is not enough like a cp/m environment
just when you find that you need it to be.   not to mention i have a lot of
cp/m machine specific programs.
 
  if you want a solution to your problem, your best bet would be to spend
$50 to $100 or so and buy a used cp/m machine.  then you can get one with
a real serial port, that won't drop chars even at 9600 baud.

  'bag' solutions like a cp/m card in an apple are really not great solutions
because you are still stuck with a 'funny' disk format and strange machine
anomolies.  (like slow serial ports, wierd video mapping, etc. etc.)


-- 
fzsitvay@techbook.COM - but don't quote me on that....

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