Re: AltairZ80 simulator updated

On Jul 28, 2:10 pm, "dott.Piergiorgio"
<dott.PiergiorgioNI...@xxxxxxxxxxxxxxxxxxxx> wrote:
Peter Schorn ha scritto:

The AltairZ80 simulator has been updated and is available for download
athttp://www.schorn.ch/cpm/intro.html

New:
- Various new devices (courtesy of Howard M. Harte)
- New operating systems to play with (courtesy of Howard M. Harte)
  * 86-DOS by Seattle Computer Products

This 86-DOS is *really* interesting, esp. the chckdsk's last line of
output, whose reveal that there wasn't technical limitations for the use
of the full 8086/88 moby, gate$ and the IBM engineers has really huge
blames.

Best regards from Italy,
Dott. Piergiorgio.

Try MS-DOS 1.25. You'll find more evidence that the 640k barrier is
not a limitation of MS-DOS, but rather a limitation of the PC
hardware. Of course, the IBM had to put memory-mapped I/O somewhere,
and 10x CP/M-80 RAM probably seemed reasonable at the time.

It also looks like there is a bug in chkdsk, but Tim Paterson probably
didn't have a meg of RAM to test with.

-Howard

.

Relevant Pages

  • Re: AltairZ80 simulator updated
    ... New operating systems to play with (courtesy of Howard M. Harte) ...
    (comp.os.cpm)
  • Re: AltairZ80 simulator updated
    ... New operating systems to play with (courtesy of Howard M. Harte) ... output, whose reveal that there wasn't technical limitations for the use of the full 8086/88 moby, gate$ and the IBM engineers has really huge blames. ...
    (comp.os.cpm)