RE: Minimal CP-M SBC design

>
>Subject: RE: Minimal CP-M SBC design
>   From: "Barry Watzman" <Watzmanneo.rr.com>
>   Date: Sun, 11 May 2008 11:16:18 -0400
>     To: <cctechclassiccmp.org>
>
>RE: "1.4 really didn't even do a DISK bios, it was
embedded in the bdos.
>the bios for 1.4 was only terminal, punch reader and
printer IO.  Yes, it
>was a pain to interface any new disk to it."
>
>Allison, that is simply not true.  The diskette format
(DPH and DBP) was
>imbedded in the BDOS, but the disk I/O was in the BIOS,
more or less like
>2.x.

Right and sorta right.

When you get down to it thats nearly as bad. But your right
the hardware
was tweekable but the hardware was always assumed to be
8" SSSD in the end.
Being able to easily alter the media dimensions (DPH and
DPB) allowed for 
larger media and more varied media.


Allison