Message: 16
Date: Sat, 17 Jan 2004 11:12:27 +0100 (CET)
From: Christian Corti <Christian.Corti(a)studserv.uni-stuttgart.de>
Subject: Re: LH0080
On Thu, 15 Jan 2004, Lyos Norezel wrote:
?!?!?
Pinout, specification etc. are identical to those of a Zilog Z80. It's
just a second source part.
Thanks for writing Christian... Completely identical in EVERY way to the zilog Z80? Kool... that make my work much easier. Thanks.
Lyos Norezel
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I've been playing with my old Pro-Log M900 programmer this morning and
I've figured out how to duplicate 1702 EPROMs. But I haven't figured out
how to use the memory buffer in the programmer. I THINK I've figured out
how to read the buffer contents and change them but something is wrong.
When I change the contents and then try to list them, they're reset to all
FFs. Either I'm not changing them or I'm not reading them or when I switch
>from edit to list they're being reset. I also haven't figured out how to
dump an EPROM to the buffer or program one from the buffer. Anybody know
how to use the M 900? I have a manual for the M 980 but it doesn't help.
The main confusion seems to be figuring out exactly what the Memory Buffer
vs Normal switch does.
Joe
Evenin' folks,
OK, I've just finished (for now) trying to get a full POST out of the VAX.
It needed a dummy load to powerup with no cards or devices present so I used
an old suspect RD54. Voltages fine and stable so in with the CPU cards
and.....
it passes the CPU tests and stops at 3 on the LED. The VT220 shows '00000000
03' which I took to mean it hadn't found any memory. RUN light stays off.
'Fine,' I think, and put the 1mb memory board in.
Still stops at 3, and sometimes the 'ready' button and 'drive 1 write
protect' LED flash alternately. It hasn't got to accessing the RQDX2 yet,
I'm making the assumption that tests 2,1 and 0 are the same as they are for
most other microvaxen.
Has anyone got a copy of the MV I owners guide or know if it lives on an FTP
server somewhere? The backplate has the list of tests on and according to it
'3' is marked as '640K??' but it stops there no matter which mem board I've
got installed, and I don't believe they're both toast. I'm reluctant to
borrow a 4mb board out of one of my other machines in case it gets nuked.
Could be a suspect backplane I suppose.
Any clues?
Cheers :)
--
Adrian/Witchy
www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum
www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(
The leds and patch panel display show 7 through 1, with zero being
control passing to secondary bootstrap.
DAP leds Led display
on, on, on 7 microverify failed before
completing the data path
microsequencer test
on, on, of 6 error found on DAP module
on, of, on 5 Error found on MCT module
on, off, off 4 undetermined error in
DAP/MCT interface
off, on, on 3 microverify worked as expected
if bootstrapping was attempted,
bad memory was found
off, on, off 2 no boot device was found
off, off, on 1 unable to boot from selected device
off, off, off xxx control passed to secondary bootst.
This from the januaryu 1984 microvax I cpu technical description.
Joe Heck
hey, u know what, building a single board computer
with an 8088 isn't all that difficult and a lot of
circuits are already available.
one can also design a custom based computer as per the
requirements.
infact, the only problem would be in loading the
monitor program, which can either be copied from
retail versions, or can written afresh(tested
ofcourse), and then used.
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I have put this out on the list before, with limited response. I am
looking for a good (preferrably working) IBM PS/2 Model 25. I would
also prefer one with a hard drive of some kind.
Thanks
Dan
I've been trying to get an RD-54 to work with an SRQD11-B Controller. I
finally figured out the the SRQD11-B wants the drive to be select to
either 1 or 2, instead of 3. I now have another, more troublesome,
problem.
The drive acts like it is selected to both 1 and 2 at the SAME TIME!.
An access to either will illuminate the drives activity light.
Everything hangs after that. The controller works fine with a Quantum
Q540 drive. So, is there some kind of Jumper or something on the RD-54
that would cause this kind of behavior?
I will probably bring the drive home this weekend and try it on an
RQDX-3 just to see if I get the same problems. Of course, I'll change
the drive select to 3 first.
Anybody have a copy of the manual for the P&T 488 S100 card? I'd like to
buy/borrow/download one - and I'll be happy to scan and post if others
are interested.
Jack
I've been having server troubles and never saw this come accross. Anyway, I
think it's a good idea for getting rid of old PC junk, rather than just
tossing them in the landfill.
> From: Joe Stevenson
> To: Classic Computers Mailing List
> Sent: 1/13/2004 7:41 AM
> Subject: Old IDE hard drives
> Is there any interest in older IDE hard drives, 170-540MB?
> I listed them on eBay, but got no response. I probably should have
> posted them to the list, but I wasn't sure that was allowed, so I
> didn't.
Well, if no one else makes a claim, the older smaller capacity drives are
usually in demand for amateur radio clubs. I have a reserve here for my
local club (in northern NJ). As an incentive, most of these clubs in the US
are 501(c)3 corporations. You would be able to take these as a tax
deduction. Find comparables on a refurb site, save the comparable resale
value from when you donate as documentation of a resonable price, and count
them as donations at the end of the year.
Much of this also applies to older 486 computers. A lot of the software
still used on the packet backbone (where it still exists) will not run on
newer machines.
Of course, I am not an accountant (IANAA?), so please verify all of this,
especially the comparables bit.
Kelly
Could someone please give me some info on the LH0080? From what I've heard it is Sharp's Z80 CPU clone... but I need datasheets... pinouts... etc. Any help would be much appreiciated. Thanks.
Lyos Gemini Norezel
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