I have a Catweasel MK1 (ISA) with a 360KB 5.25" drive attached. I'm
looking at the docs and they mention reading Commodore 1541/1571
floppies. I have some 1541 floppies I'd like to archive, notably the
INCA C128 CP/M distribution and a 1541 alignment disk.
Has anybody used a PC Catweasel in DOS to read Commodore disks in an
unmodified DSDD drive?
Longterm I'd rather use the XE1541 cables and software, but I don't
have time to make the cable right now. The Catweasel route would
simplify things a lot.
Doc
>
>Subject: kdj11-a in an 18 bit backplane?
> From: Brad Parker <brad at heeltoe.com>
> Date: Tue, 07 Jun 2005 15:10:40 -0400
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>
>as long as we're talking about rt-11 :-)
>
>Can I put a KDJ11-A (M8192-YB) in an 18 bit backplane?
>
>I have a mini backplane (8 slots) but I'm sure it's not 22 bit. I was
>curious if I could put it that backplane with some memory for a quick
>test... (I suspect the answer is no, but I thought i'd ask)
>
>-brad
No good reason not to. The only caveat is that your limited to 256k
of memory. Me I just add the wires to the buss for Q22.
Allison
Urgh. I can't decide whether to add a connector for a floppy disk to the
connector panel on this Nascom 2 case that I'm building. I don't *have*
a FDC board for it anyway, plus I only have a 2-slot backplane (at the
moment; there's room in the box for 7 or 8 boards probably).
I just can't decide whether to make the case connector panel with room
for a floppy connector, with an actual connector but not hooked up to
anything, or not bother designing it with even the space present (and a
new connector panel will need to be made to add a suitable connector)
Someone think for me :)
Do Nascom 2 owners out there typically have an FDC board and use disks
for everything, or do they just stick with the tape interface on the
machine's CPU board?
What's the maximum cable length for a floppy drive anyway?
ps. On the keyboard front I've decided to go for a 25-way D connector,
even though it seems like I could just about get away with a 15-pin one
- there's lots of room above the keys on the keyboard to add a few
status LEDs, switches etc. if some future owner wanted to do so, so
having the potential capacity for an extra 9 lines to the keyboard might
be handy...
cheers :)
Jules
>From: "9000 VAX" <vax9000 at gmail.com>
>
>On 6/6/05, Liam Proven <lproven at gmail.com> wrote:
>> On 6/7/05, O. Sharp <ohh at drizzle.com> wrote:
>>
>> > I think most of the eggs are in one basket now, and not a very reliable
>> > basket at that. :( Opinions?
>>
>> It's a sad day; the end of an era. Every major computer platform in
>> the world runs on the oldest, and arguably weakest and cruftiest, CPU
>> architecture there is. CISC has won.
>
>CISC deserve it. CISC has compact code size, thus higher cache hit
>rate. DEC will do better with faster VAX than with Alpha.
Hi
Thanks for making this point. Intel uses a RISC machine inside
as does most any other serious processor company. They can
do this because once past the bus bottleneck, one can use more
bus width inside for speed while using a CISC coding outside
for compaction.
I predict that eventually, people will realize that they should
be building a uP in every RAM chip. At that point, we may see
a revival of the RISC engine visible to the programmer. Lets
face it, right now, it is mostly a RAM chip with a processor,
it is just that they call it a processor with RAM ( cache )
and not the other way around.
>
>vax, 9000
>
>>
>> New there really is only one battle left: Unix versus Windows. Windows
>> 'Longhorn' versus OS X 10.5, 'Leopard'. The leftovers go to Linux,
>> which is Unix anyway. So much for diversity.
Although, it is most likely good for my company in the short
term, it is most likely bad for computer development in the long
run :(
Dwight
>>
>> --
>> Liam Proven
>> Home: http://welcome.to/liamsweb * Blog: http://lproven.livejournal.com
>> AOL, Yahoo UK: liamproven * ICQ: 73187508 * MSN: lproven at hotmail.com
>>
>>
>
>
My understanding is that the Pentium processor *is* a RISC processor
with a CISC layer on top. Apparently Intel also offers a licensed
library that allows access to the RISC capability.
> IBM seems to be the one remaining major vendor of "worthwhile"
> RISC-powered machines now, since Alpha has been getting squashed by
> HPaq for a while now.
>
> Pat
I figured out what most of my stray DEC boards are-- DLV11 and such. These
two baffle me. One might not even be a Q-Bus board like the rest.
Mystery board #1:
Pull-tab numbers: M7721 (Magenta)
Size: Small! regular 5-3/16 inches (132mm) width, but only 5 inches deep,
including the fingers, not including the pull tabs.
Contents: 4 transistor, some caps, resistors, small glass diodes, 14 ICs
which all look to be 7400 series TTL-- counters, flip-flops, quad-NAND, etc
Terminator? For what? It's cut for Q-Bus, but it's short.
Mystery board #2:
Unpopulated (except for U8, the only 28 pin IC on board, a Motorola
MC3242A) in other words, empty sockets. Most of the sockets are 14 or 16
pin, except for one 8-pin. 16 of the 16 pin sockets are laid out in two
neat rows, which makes me think of memory. There's voltage inverter or
charge-pump type chip at U20.
Markings: Solder side: "Copyright 1978 by Heath Company" "85-2195" "100478"
Component side: "81-2195-3" and "ADDRESS SELECTION" next to 8 jumper pads.
Gotta be a Q-Bus memory card, right?
[Science] Never express yourself more clearly than you think. --Neils
Bohr (1885-1962)
--... ...-- -.. . -. ----. --.- --.- -...
tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio)
"HEY YOU" (loud shouting) WEB ADDRESS http//www.mixweb.com/tpeters
43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc
WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531
Tom Peters <tpeters at mixcom.com> wrote:
>Mystery board #1:
> Pull-tab numbers: M7721 (Magenta)
M7721 CONTROL LOGIC A,(M7711 WITH BELL LOGIC) LA30,DOUBL
M7711 CONTROL LOGIC A,LA30,DOUBLE
So something to do with an LA30 maybe?
HTH,
Antonio
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Email provided by http://www.ntlhome.com/
>
>Subject: Re: Simulated disk drive for RT-11?
> From: Pete Turnbull <pete at dunnington.u-net.com>
> Date: Tue, 07 Jun 2005 08:11:42 +0100 (BST)
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On Jun 6 2005, 22:46, Allison wrote:
>
>> Note there were differenet backplanes used in the BA23 those
>> that were compatable with uVAX-1, those that were uVAX-II
>> and the microPDP-11. Use the wrong one with the desired CPU
>> and bad results happen.
>
>I've never seen more than one type of backplane in a BA23, and only one
>is listed in my manuals: H9278-A. It's compatible with all of
>microPDP-11, uVAX-I and uVAX-II without so much as a jumper change.
> Are you thinking of something else?
No, I have a few too. I have this thing for aquiring odd systems.
Allison
Compaq Portable II available. See below. I have no further information.
Please contact owner directly.
Reply-to: Richard.Cole at southglos.gov.uk
---------- Forwarded message ----------
Date: Tue, 7 Jun 2005 14:10:28 +0100
From: Richard Cole <Richard.Cole at southglos.gov.uk>
To: donate at vintage.org
Subject: Compaq Portable II
Are you interested in a Compaq portable 2 (sowing machine 80286 with 6"
CRT green screen)
Richard Cole
--
Sellam Ismail Vintage Computer Festival
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Hi all,
i've been given this controller long time ago, but until now, I've never been able
to find some documentation or hints how to enter into the firmware resident menu.
Does anybody have any hints, how to enter it?
Better would be the docuemntation, of course, but configuring the controller for some
standard (E-)SMD drives would be sufficent.
The controller comes with the S-Box handles for QBus-VAXen.
Thanks in advance for any help.
Pierre
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