14 Oct
2011
14 Oct
'11
9:20 a.m.
Josh, I have never been able to either. And it's not the SD
start up. It may be the lnterleave ??? or something they did that was
odd. I have been making copies on running Altos machines. My 8"
system is like yours and seems to like everything except theses.
- Jerry
________________________________
From: Josh Dersch <derschjo at mail.msu.edu>
To: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Sent: Thu, October 13, 2011 10:09:17 PM
Subject: Re: Free for the cost of shiping : Altos CPM and MiocroSoft COBOL
8"disc's
On 10/13/2011 9:53 PM, Chuck Guzis wrote:
On 13 Oct 2011 at 20:58, Josh Dersch wrote:
Nuts. I have an Adaptec AHA-1542C in my machine which I've had very
good luck with thus far. I guess I'll keep my eyes open for a board
that uses this controller...
- Josh
Some neat stuff, a copy of BDS-C, COBOL-80 and
MBASIC for the Altos.
I am not having much luck capturing images of the CP/M disks, however.
They appear to be single-sided, double-density. The first two tracks
are SD and have 26 sectors per track, the rest are DD and have 48
sectors/track which is where my system appears to have trouble,
ImageDisk just won't read the DD tracks. If anyone has any
suggestions, let me know.
It's your controller. Those sectors are MFM and 128
bytes long.
You *can* read these with a controller that uses the National Semi
DP8473 controller. NEC and Intel pretty much screwed up 128 byte MFM
sectors.
--Chuck