18 Apr
2006
18 Apr
'06
9:15 a.m.
I too just got a "new" DECmate/VT278. I?m a half-step ahead of Richard
in that I have a set of RX02's to go with it but the donor hasn't yet
been able to locate the software that he's sure he still has
"somewhere". I've downloaded some telnet images of OS/278 but I don't
have a PC running 8" drives to use to create the disks.
Can anyone help by providing a physical copy of an RX02 OS/278 boot
floppy?
Please contact me directly if you can send a disk.
In the meantime, if the docs remain elusive, I'll be glad to ring out my
VT278 - RX78 cable.
best,
Jack
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18 Apr
18 Apr
6:51 p.m.
The RX02 format is specific to DEC and the RX02 and it can't be read or
written by anything other than an RX02 or something designed for that
task. The RX01 format is straight IBM 3470, but the RX02 has sector
header fields in FM and data fields in a modified MFM format. I have
never seen anybody claim it was even possible to read/write an RX02
using a PC disk controller.
This is from research I have done. I am sure somebody can supply more
details.
I don't have any RX02 drives, but I have built a little interface and
written some software that lets a PC running Linux or NetBSD act like an
RX02. I have used it with RT-11 on a PDP-11/40 and microPDP-11/73 and
with OS/8 V3D on a PDP-8/e.
I have some details here: http://www.chd.dyndns.org/rx02/
-chuck
8:46 p.m.
On Tuesday 18 April 2006 18:51, C. H. Dickman wrote:
The RX02 format is specific to DEC and the RX02 and it
can't be read or
written by anything other than an RX02 or something designed for that
task. The RX01 format is straight IBM 3470, but the RX02 has sector
header fields in FM and data fields in a modified MFM format. I have
never seen anybody claim it was even possible to read/write an RX02
using a PC disk controller.
This is from research I have done. I am sure somebody can supply more
details.
You could always pick up a catweasel controller, shove it into your PC, and
write disks that way, also.
Pat
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The Computer Refuge --- http://computer-refuge.org
8:51 p.m.
On 4/18/2006 at 6:51 PM C. H. Dickman wrote:
This is from research I have done. I am sure somebody
can supply more
details.
Yup, single-density address headers and double-density data, with
substitutions made for MFM patterns that can be confused with FM address
marks. A Catweasel will handle these very nicely on a PC.
Cheers,
Chuck
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3 comments
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participants (4)
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cclist＠sydex.com -
chd_1＠nktelco.net -
jack.rubin＠ameritech.net -
pat＠computer-refuge.org