23 Mar
2006
23 Mar
'06
4:03 p.m.
Looking at the PCB, it has a 50-pin and a 20-pin
connector.
Is that SA4000?
SA1000
SA4000 was the 14" drive.
AED sold these drives in their WINC08 RL02 emulating drive product.
Compupro sold them as well.
There was an ANSI standard number for the interface, but I don't
remember
the number off hand.
23 Mar
23 Mar
4:10 p.m.
New subject: RL01 drive connector (was: What disk is this? eBay #8782293215)
In article <D051FE4D-4730-42B9-915D-EF104CE0AC3A at bitsavers.org>,
Al Kossow <aek at bitsavers.org> writes:
AED sold these drives in their WINC08 RL02 emulating
drive product.
Compupro sold them as well.
Speaking of emulating RL0{1,2} drives, if I wanted to attach some sort
of drive emulator to the big fat cable attached to the RL01 drive,
where would I get specifications on the signals in the cable?
(Yes, I'm still thinking of how to emulate expensive things that may
die so I don't have to kill them by operating them :-).
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
24 Mar
24 Mar
12:04 p.m.
New subject: RL01 drive connector (was: What disk is this? eBay #8782293215)
Speaking of emulating RL0{1,2} drives, if I wanted to
attach some sort
of drive emulator to the big fat cable attached to the RL01 drive,
where would I get specifications on the signals in the cable?
AFAIK there never was a published specification. You'll have to work it
out from the printsets and the RL01 technical manual. It's not that
complicated, I worked out enough to make a drive exerxiser <mumber> years
ago.
From what I rememebr, you have raw data signals, write
gate, etc. The
drive will complain if you assert write gate at the wrong time (e.g.
during the servo burst time). There's also a serial clock/data signal
set which sends head-movement commands from the controller to the drive
(you send the number of cylinders you want to move to, and the
direction). and reports drive status back to the controller.
(Yes, I'm still thinking of how to emulate expensive things that may
die so I don't have to kill them by operating them :-).
Why bother to run a classic computer at all, then? Seriously, the drives
are as much a part of the system as the CPU is.
-tony
1:36 p.m.
New subject: RL01 drive connector (was: What disk is this? eBay #8782293215)
In article <m1FMsW3-000IyWC at p850ug1>,
ard at p850ug1.demon.co.uk (Tony Duell) writes:
Why bother to run a classic computer at all, then?
Seriously, the drives
are as much a part of the system as the CPU is.
I hear what you're saying, but the drives are also the part that's
hardest to replace. Seriously, I see PDP-11 CPU cards and controller
cards out on ebay all the time but rarely do I see an actual RL01
drive or the disk packs. Thankfully I have about 25 disk packs, so
they are not the limiting factor.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
7:58 p.m.
New subject: RL01 drive connector (was: What disk is this? eBay #8782293215)
Speaking of emulating RL0{1,2} drives, if I wanted to
attach some sort
of drive emulator to the big fat cable attached to the RL01 drive,
where would I get specifications on the signals in the cable?
Chapter 3 of
http://www.bitsavers.org/pdf/dec/disc/rl01_rl02/RL02techDescr.pdf
seems to have some of this.
(Yes, I'm still thinking of how to emulate
expensive things that may
die so I don't have to kill them by operating them :-).
I think it's an interesting project :-).
Vince
6889
days inactive
6890
days old
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aek＠bitsavers.org -
ard＠p850ug1.demon.co.uk -
legalize＠xmission.com -
vrs＠msn.com