On Apr 5 2005, 19:21, Allison wrote:
> The state machine is a simple but programable non-von cpu that can do
> the needed tasks to execute complex command to seek, read or write
> a sector. The RX02 is a 2901based bitslice that does more as it
> has to do the needed tricks for DD format.
Ah yes, I'd forgotten that. Thanks for reminding me where I'd seen
another 2901!
Welcome back, by the way :-)
--
Pete Peter Turnbull
Network Manager
University of York
Normally, all Postscript printers have a built-in self test, but I don't
know how to work it on any of the apple products.
I believe that it can be interfaced to a PC, but may be slow.
Toner should be available, it was a Canon-engine printer, I think the "CX"
engine, same as the original HP Laserjet. It MIGHT be an "SX" engine, which
would be much better. In either case, you should be able to get toner,
although it won't be "on the shelves" at a local retail store.
Hmm,
He states "i am useing a floppy cable with a twist in
it and a 20 pin data cable."
hard drives did not use a twisted cable on them.
the used a 34 pin (data) and a 20 pin(control)
streight thru cable(s.
Bill
__________________________________
Do you Yahoo!?
Make Yahoo! your home page
http://www.yahoo.com/r/hs
Well all seemed fine, I was working on Kermit, making good
progress, then I/O PARITY ERROR AT xxxx -- disk read error. Diags
etc, another shows up. Then another, but a previous goes away...
Clearly there is a soft(ish) read error. Probably all those cheap
ceramic disks on the read/write/amp board. So I will order nice,
new, correct monolithic caps, and replace all the replacements.
It's almost certainly in the analog read/write section, and not
hard logic, said hypothesis boosted by the fact of my fiddling in
that arena.
I ran memory diags and all that stuff, but I am assuming it's the
electronics I fiddled. I'll go do the job Right.
I just scanned a small manual by Philips Data Systems from 1972 called
"SUMMARY OF P 350 BASIC AND PERIPHERAL ASSEMBLER INSTRUCTIONS WITH THEIR
ABSOLUTE EQUIVALENTS"
I dont expect any one to have this machine since this even seems to be only
document around and the philips museum doesn't even have anything, but well
in case some one does (tell me, tell me!!), you can find it on my site
http://www.mansier.net under Vintage Document Library.
Cheers,
Stefan.
-------------------------------------------------------
http://www.oldcomputercollection.com
> On Apr 5, 2005 9:59 PM, liste at artware.qc.ca <liste at artware.qc.ca>
> wrote:
>> Looking around the local salvation army, I spotted a LaserWriter plus.
>> I've searched the archives and discovered it's a PostScript enabled
>> laser
>> printer with RS-442 interface. It seems. No disucssion of the "plus"
>> specifically.
>
Manual is at
<http://download.info.apple.com/Apple_Support_Area/Manuals/printers/
LaserwriterLaserwriterPlus.PDF>
Specifications at
<http://docs.info.apple.com/article.html?artnum=112476>
>> If it helps, there was a DB-25, a DE-9 and small (4? 6?)
>> dip switch on the back (that I remember, I don't remember any
>> mini-DIN).
>
> Nope... no mini-DIN. The DE-9 is the AppleTalk interface (like 512K
> Macs). The DB-25 is for ordinary serial devices so that, IIRC, one
> can blow ASCII at it and the LW+ intereprets it as, I think, a Diablo
> daisywheel printer, courier only, etc. I _think_ there's a way to
> emit PostScript at the DB25, but it's not going to be a speedy
> interface. The printer was primarily developed for Mac use on
> AppleTalk/LocalTalk
>
See <http://docs.info.apple.com/article.html?artnum=24471> for
interface.
>> I'd be interested in having a "real" postscript printer. But I'd
>> like to
>> test it before buying.
>
> One could take a Palm and a travel cable and DE9-DB252 adapter and run
> a VT100 app and blow chars at the DB25 port...
>
>> - Is there a way to print a test page w/o pluging into a computer?
>
> Does it not print a test page at power-on? I think what my mom used
> to do at work was power hers on with the paper tray removed to _not_
> get a test print (and waste the paper).
>
The test page is controlled by a PostScript variable which can be
programmed through either port. Apple OSs prior to X had a LaserWriter
Utility in which you could control the test page. However be warned,
LaserWriters can be password protected...
>> - Can this be interface to a straight PC? If the DB-25 is RS-232, I'd
>> assume so.
>
> Yes, the DB25 is RS-232, but there may be a protocol issue there (raw
> ASCII vs PS).
You can run either PS or Diablo 630 emulation from a windoze box on the
RS-232 port. '95 and later have PS drivers for the box.
>
>> - Is toner readily available?
>
> Yes, same toner as used in the HP LJ 1, 2, 3 as well as Apple
> LaserWriter, Plus, SC, II, IInt (and all the other printers based on
> the
> Canon SX engine). Last time I bought one, they were going for around
> $45
> for a 6000 page cart.
The Plus uses a Canon CX engine. The toner is getting harder to find.
My recommendation would be to skip this one. Although a true "Classic"
the pickup rollers are probably goo by now and a true bitch to replace,
let alone find. If you go this route, ensure you find another one for
parts. In Apple land I would look for a LaserWriter II NT, NTX, or g.
All are PS printers, use the SX engine for which need parts are still
available and are supported on the Dark Side. The NT and NTX are
supported over RS232 (slow) while the g is LAN capable. (Besides I have
a superfulous redundancy of parts available to help out...)
CRC
Hi Guys,
I've got a Cromemco System-3 which I've been wrestling with
on and off for quite a few months now ... I've got it to the
point where it will boot and run CDOS, however Cromix hangs
during boot.
I've "boiled it down" to just the ZPU, 16FDC, and the RAM
cards which are a pair of 256KZs, with the 948 and 949
addressing ROMs in them (sw.1 is ON for the 948 card and
OFF for the 949 card as described in the documentation).
I want to run a comprehensive memory test... I written
such a test and can "load" it by having a PC "type" the
HEX code into RDOS's SM command - then run it with 'G' -
that all works fine, and I have verified that the default
32k that comes up with RDOS appears to be OK.
Now I want to test all of the possible banks in the 256KZs
and so far I can not find any documentation as to how the
bank select works. From the 16KZ docs I see that the normal
bank select register is 40h, and this does do "something"
to the 256KZs ... I've determined that by writing individual
bits 1, 2, 3 or 4 I can swap in four distinct 32k blocks into
the upper half, while nibbles with other than one bit set all
seem to map to the same block which is different from the
other 4 ... This makes 5x32k = only 160k.
I've also determined that writing individual bits 4, 5, 6 or 7
causes the system to die, which I'm guessing is because it is
swapping the lower 32k (where my program is running)... It it
works the same as the lower-nibble/upper-block, then that would
give a total of 10x32k = 320k that I can access from the 512k
physical memory on the cards ... ?
Can anyone provide me with details of exactly how the bank
select works with dual 256KZ cards installed, and how to map
in the entire 512k (obviously a section at a time)?
Unfortunately I don't have the 947 address ROM which would
have shipped with single cards, so I can't test the cards by
thenselves... Anybody got a spare?
Also, I note that RDOS will not come up if the ZPU is set for
2MHZ ... It appears to only run at 4MHZ - is this normal?
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
> > On laserjets you can hold down the online button while powering up
the
> > printer. Hold until it starts to print and it provides a status page
> > and a graphics test page. Give it a try.
>
> There are no buttons on an Apple LaserWriter (Plus). Buttons
> are an HP LaserJet thing.
On the Canon CX Engine, wasn't there a button on the side panel that
would print a set of parallel lines independent of the controller?
>- Is there a way to print a test page w/o pluging into a computer?
Provided the dip switches have not been changed, then just power it up,
it will print a status page that tells what language it is set to use,
what port, and the page count. (IIRC, one of the dip switches can disable
this test page at power on)
>- Can this be interface to a straight PC? If the DB-25 is RS-232, I'd
>assume so.
Yes over the DB25, but it tops out at 9600 bps, so it is SLOW to print.
>- Is toner readily available?
Yes, same toner as used in the HP LJ 1, 2, 3 as well as Apple
LaserWriter, Plus, SC, II, IInt (and all the other printers based on the
Canon SX engine). Last time I bought one, they were going for around $45
for a 6000 page cart.
-chris
<http://www.mythtech.net>
>
>Subject: Re: rx01 w/o controller board
> From: Ethan Dicks <ethan.dicks at gmail.com>
>
>On Apr 5, 2005 11:52 PM, Allison <ajp166 at bellatlantic.net> wrote:
>> I plan to put a T-11 in a smallbox with a 640x480 mono lcd
>> and keyboard and run RT11 on batteries with it. I be tired
>> of washin winders.
>
>Nice... I noticed your LCD questions elsewhere... I have similar
>dreams, but with an SBC6120 at the middle of everything.
>
>-ethan
Hi there! Actually the diplay system is the first priority as
the likely cpu could be T-11, Z80, Z280, 1802 or even 6120.
One possible display solution I tripped across is there are car
TVs or at least the LCD video monitors that could accept
componenet or RS170 video. From what I've seen these are getting
down there in cost for the 6-8" sizes. Back to the days of
VDM1, and TVT6 type display systems in a whole new way and
possibly cheap too.
Allison
