20 Nov
2000
20 Nov
'00
4:50 a.m.
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > >
Oh - must have miscounted :-/
The box in
question is a RML-380Z-D model, with
dual 5
1/4" drives, and I think, 32K RAM. It has
two
video
There is room for 32K RAM (2 rows of 4116s) on the
CPU card. If you have
the RAM expansion card (which, as you imply is a CPU
board with the CPU
and many other chips messing and a different address
decoder PROM) then
you possibly have up to 56K RAM.
I has an address *prom*? I thought it was purely TTL?
I s'pose its hard to tell with all the pretty little
coloured[1] splodges all over the socketed chips
(presumably to aid the people who put the chips in...)
COS = Cassette Operating System, and is basically a
bootstrap loader (for
cassette or disk) and a machine code monitor.
I figured that much out eventually :)
I should have a system disk somewhere, but it would
take some time to find
it.
Kewl - any system disk, even a duplicate is good - at
least one may work.
I also should have the COS user manual (giving
some of the calls,
etc)
In what format? Electronic? (i.e. easily sharable?)
but I don't have the optional source lisitng of
COS (and FWIW, I'm
looking for it too).
As soon as the <insert your own expletive> person who
broke our lab's device programmer fixes it - i'll dump
the COS roms. I managed to dump the disk rom, using
an older programmer - but it wouldn't touch the older,
mainboard devices - It complained of over-current. I
suspect it was not intended to cope with *all* devices
- unlike our really fancy new one - which is broke :(
Yes, or X to boot with the floppies swapped over
(the 'B' drive is A:).
The latter is useful if one drive decides to fail...
How thoughtful of RML :)
There is an LED on the
floppy
Um, no! I know nowt about this box - I'll check the
disk controller very carefully tonight. Its software
is certaining interesting - very wacky code, quite a
bit of it polymorphic - just to hurt your brain :-/
The card *is* on the main bus, and is connected to the
floppy and serial port. It is also stamped (C)RML,
ISTR.
I've a really nasty feeling, this machine has been a
student project, and they used the floppy controller
as a secondary cpu :) Should there be a mostek MT4802
(2Kx8 SRAM) in the socket above the eprom? It doesn't
even occupy all the socket (which is suspicious) and
the ROM does contain memory sizing routines...they're
obvious :) I *really* hope not!
Dave.
[1] Appologies if you think I spelt it wrogn ;0
__________________________________________________
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Yahoo! Calendar - Get organized for the holidays!
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controller, it flashes with a kind of 'heart
beat'
pattern i.e.
Flash-flash--pause--flash-flash--pause
Are you sure this is a standard RML disk controller?
I can't find any LED
on the schematics, and I don't remember there being
one when I looked
inside my machine. The standard disk controller is
one card that fits
onto the 50 way 'bus' ribbon cable, and which
contains a 1771 disk
controller (Single density only) and a 8251-based
serial port (device SIO-4) 
20 Nov
20 Nov
7:48 a.m.
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8:28 a.m.
New subject: Infamous Toshiba power supply
I have several old Toshiba T1000 laptops, which all are suffering from the
(known) problem, where the onboard switching power supply has failed. When you
turn on the power switch, the power light comes on for a moment, then winks out
(or flashes in some cases). I have been told by a Toshiba insider that
this was a well-known defect (much like Toshiba floppy drives) but Toshiba was
never willing to own up to it. Hard to say if this is true or not.
This problem can be seen in may models of Toshiba notebook, I have even heard
of it on Pentium class machines. I'm told that there is a fix, but the techs
were not allowed to do it - the official remedy was to replace the board. A
person with limited English once told me that I needed to replace the 'filters'
on the board - to which end I replaced all of the electrolytic filter caps. The
machine ran for 30 seconds, before relapsing.
Does anyone know the right fix for this problem? I would be in your debt..
--
Bill Layer
Sales Technician
<b.layer(a)vikingelectronics.com>
23 Nov
23 Nov
1:03 p.m.
New subject: somewhat OT inkjet unclogging.
Ahem... this is not so quite on topic but I'm sure there is several
classic 10 years old inkjet printers but my line of work involves
pirnters that doesn't have removeable inkjet printhead ie: epson
inkjets. Their replacement inkjet printhead cost over 100 and value
on those printers when new is appox 170 to 250 when new. Even HP
have gone in that direction for high end printers recently.
Now, on unclogging inkjet nozzles. Ususally works but one day I had
enough and thought of investing into big gun to do the job. The "big
gun" is ultrasonic cleaner pot.
Did anyone experienced that this works on badly clogged inkjet
printheads? If so, what working cleaning fluid? Pure alcohol?
Distilled water?
In past, tried pressure unclog method using hobby silicone fuel
tubing and 10cc injecter without needle filled with methyl hydrate
alcohol 99.9 pure, I find it mose of a crapshoot than high rate
success rate.
Ink fluid is usually either coloured clear solution or finely
powdered in fluid carrier (black usually).
Cheers,
Wizard
6:39 p.m.
New subject: HP Paintjet
I noticed a rather large-ish HP paintjet at the local thrift store the other
day. They wanted $50 for this baby in unknown condition and probably
missing any important detachable external components.
Does that interest anybody? It's quite large and located in Denver.
Dick
24 Nov
24 Nov
6:40 a.m.
New subject: HP Paintjet
Do you know the model number? There are a few PaintJet models out there, may
be useful for parts for one of my customers if it's the right model. Either
the Paintjet xxxx (where the xxx is additional numbers) or on the
back/side/etc there should be a Cxxxxx number that says model number and
also have the serial number.
If it's out of your way forget it. If you happen by drop me a note. Denver
to here would be pricey but might be cheaper than the alternative if it's
the right model.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Thursday, November 23, 2000 11:39 PM
To: classiccmp(a)classiccmp.org
Subject: HP Paintjet
I noticed a rather large-ish HP paintjet at the local thrift store the other
day. They wanted $50 for this baby in unknown condition and probably
missing any important detachable external components.
Does that interest anybody? It's quite large and located in Denver.
Dick
8:52 a.m.
New subject: HP Paintjet
I'll be in that neighborhood later today and will check.
Dick
----- Original Message -----
From: "Russ Blakeman" <russ(a)rbcs.8m.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, November 24, 2000 10:40 AM
Subject: RE: HP Paintjet
Do you know the model number? There are a few PaintJet
models out there,
may
be useful for parts for one of my customers if
it's the right model.
Either
the Paintjet xxxx (where the xxx is additional
numbers) or on the
back/side/etc there should be a Cxxxxx number that says model number and
also have the serial number.
If it's out of your way forget it. If you happen by drop me a note.
Denver
to here would be pricey but might be cheaper than the
alternative if it's
the right model.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Thursday, November 23, 2000 11:39 PM
To: classiccmp(a)classiccmp.org
Subject: HP Paintjet
I noticed a rather large-ish HP paintjet at the local thrift store the
other
day. They wanted $50 for this baby in unknown
condition and probably
missing any important detachable external components.
Does that interest anybody? It's quite large and located in Denver.
Dick
10:14 a.m.
New subject: HP Paintjet
Cool, thanks
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Friday, November 24, 2000 1:52 PM
To: classiccmp(a)classiccmp.org
Subject: Re: HP Paintjet
I'll be in that neighborhood later today and will check.
Dick
----- Original Message -----
From: "Russ Blakeman" <russ(a)rbcs.8m.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, November 24, 2000 10:40 AM
Subject: RE: HP Paintjet
Do you know the model number? There are a few PaintJet
models out there,
may
be useful for parts for one of my customers if
it's the right model.
Either
the Paintjet xxxx (where the xxx is additional
numbers) or on the
back/side/etc there should be a Cxxxxx number that says model number and
also have the serial number.
If it's out of your way forget it. If you happen by drop me a note.
Denver
to here would be pricey but might be cheaper than the
alternative if it's
the right model.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Thursday, November 23, 2000 11:39 PM
To: classiccmp(a)classiccmp.org
Subject: HP Paintjet
I noticed a rather large-ish HP paintjet at the local thrift store the
other
day. They wanted $50 for this baby in unknown
condition and probably
missing any important detachable external components.
Does that interest anybody? It's quite large and located in Denver.
Dick
23 Nov
23 Nov
6:46 p.m.
New subject: somewhat OT inkjet unclogging.
jpero(a)sympatico.ca wrote:
Did anyone experienced that this works on badly clogged inkjet
printheads? If so, what working cleaning fluid? Pure alcohol?
Distilled water?
I've tried the ultrasonic cleaner with no real success. Someone I know had
the same problem with a cartridge that had sat around for a number of days
and put some 409 cleaner on it; it worked like a charm even on cartridges
that had sat around for a couple of weeks. I would love to hear if anyone
else tries it with the same success.
24 Nov
24 Nov
4:16 a.m.
New subject: somewhat OT inkjet unclogging.
Date: Thu, 23 Nov 2000 21:46:36 -0800
From: Marvin <marvin(a)rain.org>
To: classiccmp(a)classiccmp.org
Subject: Re: somewhat OT inkjet unclogging.
Reply-to: classiccmp(a)classiccmp.org
Snip!
and put some 409 cleaner on it; it worked like a charm
even on cartridges
that had sat around for a couple of weeks. I would love to hear if anyone
else tries it with the same success.
Hmmm...what is the active stuff in that 409? Mind you, this is
Canada and haven't seen one anywhere except in USA. Water seems to
work ok on fresh solids under running water, for old solids takes
some scrubbing. Windex doesn't work too well, alcohol sorta ok.
As Russ have confirmed the cost of epson carriages is nearly 130
where the value of new epson low end 170 leaving you with 40 dollars
worth of whole thing except for clogged head. Not funny and
naturally customers don't want to buy the carrage itself, either fix
the printer or buy different brand (HP, canon or another epson.)
Most customers buy 170 to 250 dollars range epson printers becuase of
"cheap" ink containers actually cost more in long run than HP and to
some lesser degree with Canon.
But yet we want to at least able to repair those plugged up
carragies and earn some cash on it along with pc repair work.
I think working fluid might be ineffective agent at dissolving
solidifed ink. Most of that clogs occurs in nozzles/actators in
epson. Epson use sonic action caused by quartz kickers to squrt ink
out. HP use resistive heating to instantly "boil" ink.
Sometimes we do refill carts and find HP black ink works well on both
epson and canon BJ-01/02. Epson and canon, HP color carts most easy
to fill because the holding tank is made up of simple vented
container and block of felt. HP black ones very fussy due to that
air expansion bag. :-P
Cheers,
Wizard
6:37 a.m.
New subject: somewhat OT inkjet unclogging.
I've used 409 as well as fantasic and they seem to work fine for most.
Sometime you get a genius that used a refill kit for a differetn brand
(therefore different mix) and the end result is a new part.
Sometimes sources like http://www.agson.com will have replacement parts well
under the OEM parts. Check also with a local shop that repairs printers as
they may have non-repairable machines for parts use and have what you need
in good shape at a reasonable, if any cost, price.
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Marvin
Sent: Thursday, November 23, 2000 11:47 PM
To: classiccmp(a)classiccmp.org
Subject: Re: somewhat OT inkjet unclogging.
jpero(a)sympatico.ca wrote:
Did anyone experienced that this works on badly clogged inkjet
printheads? If so, what working cleaning fluid? Pure alcohol?
Distilled water?
I've tried the ultrasonic cleaner with no real success. Someone I know had
the same problem with a cartridge that had sat around for a number of days
and put some 409 cleaner on it; it worked like a charm even on cartridges
that had sat around for a couple of weeks. I would love to hear if anyone
else tries it with the same success.
6:49 a.m.
New subject: somewhat OT inkjet unclogging.
----- Original Message -----
From: "Russ Blakeman" <russ(a)rbcs.8m.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, November 24, 2000 10:37 AM
Subject: RE: somewhat OT inkjet unclogging.
I've used 409 as well as fantasic and they seem to
work fine for most.
Sometime you get a genius that used a refill kit for a differetn brand
(therefore different mix) and the end result is a new part.
I'm not sure if we're talking about the same thing, but does this work for
HP Deskjet cartridges (printhead integral to the cartridge) that are still
full of liquid ink, but refuse to print? If you clean the printhead with
water, they usually never work again. So should I use Fantastic or 409 on a
Q-tip instead of water?
Mark "Tired of throwing out half full cartridges" Gregory
8:21 a.m.
New subject: somewhat OT inkjet unclogging.
The Epson's have a carriage unit without the integrated ports and the screen
gets clogged. The HP's I usually wipe (don't touch the electrical
connection)the bottom with a soft cotton cloth and occasionally had to tap
them firmly onto the cloth (in my hand, not on a table or hard surface) to
work the ink through. If all else fails on the HP and other integral units,
replacement (at a lot lower cost than a carriage for an Epson) is
imminent/needed. An HP cartridge averages $35 whereas the carriage for the
previously mentioned Epson runs around $135
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Mark Gregory
Sent: Friday, November 24, 2000 11:50 AM
To: classiccmp(a)classiccmp.org
Subject: Re: somewhat OT inkjet unclogging.
----- Original Message -----
From: "Russ Blakeman" <russ(a)rbcs.8m.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, November 24, 2000 10:37 AM
Subject: RE: somewhat OT inkjet unclogging.
I've used 409 as well as fantasic and they seem to
work fine for most.
Sometime you get a genius that used a refill kit for a differetn brand
(therefore different mix) and the end result is a new part.
I'm not sure if we're talking about the same thing, but does this work for
HP Deskjet cartridges (printhead integral to the cartridge) that are still
full of liquid ink, but refuse to print? If you clean the printhead with
water, they usually never work again. So should I use Fantastic or 409 on a
Q-tip instead of water?
Mark "Tired of throwing out half full cartridges" Gregory
8:37 a.m.
New subject: somewhat OT inkjet unclogging.
Mark Gregory wrote:
Russ has already responded, but I was referring to the cartridges with the
printhead integral to the cartridge. I've also tried water with not much
success. I would suspect the success of cleaning has to do with the surface
tension of the cleaning fluid; anyone know for sure?
I've used
409 as well as fantasic and they seem to work fine for most.
Sometime you get a genius that used a refill kit for a differetn brand
(therefore different mix) and the end result is a new part.
I'm not sure if we're talking about the same thing, but does this work for
HP Deskjet cartridges (printhead integral to the cartridge) that are still
full of liquid ink, but refuse to print? If you clean the printhead with
water, they usually never work again. So should I use Fantastic or 409 on a
Q-tip instead of water?
4:27 a.m.
New subject: somewhat OT inkjet unclogging.
Date: Fri, 24 Nov 2000 11:37:15 -0800
From: Marvin <marvin(a)rain.org>
To: classiccmp(a)classiccmp.org
Subject: Re: somewhat OT inkjet unclogging.
Reply-to: classiccmp(a)classiccmp.org
Hi,
Water and mercury is very strong surface tension. Alcohol, soapy
water etc least. But I have good success with water when cleaning
up built up curds on HP and canon carts that wasn't clogged up *and*
cleaning stations, weird.
Tools used: diposeable blue wipe due to no lints, cotton swabs,
watch for any stray bits! With any cleaning agents discussed here.
But THIS simple mechanical cleaning doesn't work too well on plugged
up carts. That's why I thought of ultrasonics and effective fluid
like 409 or something else.
This is why I wanted to see your war stories here with effective
methods to combat those problems.
Wizard
8641
days inactive
8645
days old
14 comments
8 participants
participants (8)
-
ard＠p850ug1.demon.co.uk -
b.layer＠vikingelectronics.com -
edick＠idcomm.com -
gregorym＠cadvision.com -
jpero＠sympatico.ca -
kebabthesheep＠yahoo.com -
marvin＠rain.org -
russ＠rbcs.8m.com