On Oct 16, 22:30, Zane H. Healy wrote:
> Subject: Re: RX50 / RX33 Questions related to PDP-11's
> >> BTW what are the two extra jumpers on the later revision card?
> >
> >Which jumopers?
>
> If you look straight down, with the handles at the top, the card with the
> 23-243E5 and 23-244E5 ROMs has a pair of jumpers to to the right of the
> ROMs. These aren't on the cards I've got with the 23-216E5 and 23-217E5
> ROMs, nor are they on the documentation that Bruce Lane provided last
> weekend.
Hmmm... Not shown in my RQDX3 manual, nor on any of the microfiche I have.
At first I thought you might mean W23 or W12/W13, but they're on the left.
I suspect they're some factory test setting. If I have the time, I'll
pull one of my RQDX3s this weekend and have a look -- though just looking
at them may not do much good, of course!
> The card with the later ROMs will in fact support my home made RX33's.
Sounds like all the jumpers (except possibly W23) are set up right, then
:-)
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
On Oct 15, 18:17, Zane H. Healy wrote:
> Subject: Re: RX50 / RX33 Questions related to PDP-11's
> Peter Turnbull wrote:
> >That's 23-216E5 and 23-217E5, the first version of the RQDX3 code. The
> >second revision is 23-244E5 and 23-245E5, which I think does support
RX33s.
> I hope you mean 23-243E5 and 23-244E5. I was able to find one controller
> with that revision, however the rest were the original revision.
Yes, I do, sorry!
> BTW what are the two extra jumpers on the later revision card?
Which jumopers?
> Still no luck otherwise though. Acts the same when I try to boot.
If your ROMs don't support RX33s, there are two problems that may prevent
the RQDX seeing the drives as usable.
First is that an RX50 responds with a READY signal as soon as it's polled,
if there's a disk in it, because the READY signal is really a "disk in"
signal from a set of contacts. Most drives respond with READY only after
the disk is up to speed, since the signal is derived from the index pulses
(the original meaning of the READY signal was that there is a disk in, and
it's up to speed, as determined by measuring the time between two index
pulses). The 200ms (minimum) delay prevents the RQDX seeing the disk.
Second is that on an RX50, the SideSelect -- which isn't normally used,
since an RX50 is really two single-sided drives -- is used to disable the
TrackZero output. The RQDX tests for an RX50 by stepping to Trk0, checking
the output, setting the SideSelect, and checking that the Trk0 signal has
gone away.
I guess these tests are probably because the RX50 shares some signals with
the RDxx drives on the same distribution board.
I have two or three Canon and Mitsubishi drives modified to work like this,
and they work fine on RQDX2s and 3s. Unmodified, they don't. In fact, now
I think about it, I have a feeling those drive "fixes" are needed for the
243/244 ROMs as well.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
< Has anyone tried wiring an 8" RX52 floppy straight to a modern PC
< controller? I did the best I know how, and I *appear* to have a
What is an RX52 floppy? I'll presume you mean the rather large dual
drive RX02. The DEC 8" floppies are RX01/2 and have their own internal
controller. That would make RX01 or 02 disk system very hard to wire
to a PC floppy controller, like near impossible.
FYI: The DEC RX02 DD format is not readable by any standard floppy
controller chip. RX01 however is standard 128 bytes IBM softsector
format.
RX50 drives are fairly easy to wire to a PC it is however single sided
and dual drive with one spindle. The later item will cause all mannor
of errors if the driver doesn't internally know the two drives have a
common positioner. However FD55s jumperd for slow spindle and only
using one side work better!
< On a similar note, does anyone happen to have a Compaticard for
< trade/sale?
Compaticard can only read RX01.
Allison
< use my m.2 and m.3 to check out OS9. I don't think m.1 can use it. There
< to be a respectable amount of software that supports OS9.
< ISTR also that there were other platforms that used it . Any idea what
< were ?
SWTP and other SS50 bus machine with 6809s in them. there was a 6809 S100
CPU that could run it. Generally speaking Moto based systems were not on
my hot list back then (there was some nice stuff though!). The 6809
however did catch my eye as a pretty decent 8bit bus cpu from moto.
Allison
Sorry, I forgot to give the number of the Heath
manual replacement service. It's (616) 925-5899.
If you ever lose the number, it's available on
Heath's site at http://www.heathkit.com/.
=========================================
Doug Coward
Press Start Inc.
Sunnyvale,CA
=========================================
I just grabbed a Rainbow out of the garbage with the garbage truck
literally meters away from getting it. After major industrial cleanup
(removing the half gallon of house paint from it and the cigarette goo),
Its up and running mostly. It came with the MS-Dos 2.05 OS, some
manuals, and thats it.
I know diddly squat about this beast (other than the legend of
it possessing two CPU's) and CP/M. So this is a very basic question. When
I get to the menu at boot up it recognizes a: and b: (though a: is a bit
wonky). It will also respond to W which tells me that
there are two cp/m partitions: e: and f: however, when I try to go to
them I get a "message 23 - Non-System Diskette". I seem to be missing the
manual with numbered error messages. I'm assuming that this means that
there is a hard drive problem. However, it is recognizing the partitions
so something is being read. I also don't have the CP/M diskette, only the
DOS. This DOS doesn't have FDISK so I can't look at the partitions via an
OS I know well (though I could do it through debug but I'm being lazy
here), and when I bit the bullet and tried to format the hard
drive it keeps telling me to stick in the diskette to format.
Any help would be appreciated otherwise I'll do a low level
format on the segate drive and pray to the appropriate dieties.
Colan
I went trift store shopping today and picked a copy of "Problem Solving and
the Computer; A Structured Concept with PL/1 (Pl/C)" by Shortt-Wilson.
Does anyone need it?
Joe
That reminds me, does anyone have a burner that can both read & program
16-pin 256x4 PROMs?
Kai
-----Original Message-----
From: Doug Coward [mailto:dcoward@pressstart.com]
Sent: Friday, October 16, 1998 3:27 PM
To: Discussion re-collecting of classic computers
Subject: Re: PROM Burner
Joe said:
> DataI/O is the lousy about supporting the older equipment. I have a
>model 29 and a 2B module. I do have instructions for the 29 but not for
>the module. The 29 can be programmed from a computer by simple data
>transfer via Rs-232. Or you can use the keypad to enter all the data or to
>modify the data. BUT you need the instructions for the module since they
>include the code numbers used to identify the various EPROMS to the
>programmer. Without those codes the programmer is useless.
I can't believe all of the hammering that Data I/O
is taking on this list.
When I got my series 22 I when right to the Obsolete
Programmer Support section of Data I/Os site to get
the list of code for it. They are right there!!
http://www.dataio.com/support/obsolete.html
or their FTP site
ftp://ftp.data-io.com/dataio/
=========================================
Doug Coward
Press Start Inc.
Sunnyvale,CA
=========================================
Joe said:
> DataI/O is the lousy about supporting the older equipment. I have a
>model 29 and a 2B module. I do have instructions for the 29 but not for
>the module. The 29 can be programmed from a computer by simple data
>transfer via Rs-232. Or you can use the keypad to enter all the data or to
>modify the data. BUT you need the instructions for the module since they
>include the code numbers used to identify the various EPROMS to the
>programmer. Without those codes the programmer is useless.
I can't believe all of the hammering that Data I/O
is taking on this list.
When I got my series 22 I when right to the Obsolete
Programmer Support section of Data I/Os site to get
the list of code for it. They are right there!!
http://www.dataio.com/support/obsolete.html
or their FTP site
ftp://ftp.data-io.com/dataio/
=========================================
Doug Coward
Press Start Inc.
Sunnyvale,CA
=========================================
Wow, I didn't expect this much help getting rid of our "trash".
Basically, there's nothing much unique here. Just some Apple LCs
(bottom of the line) circa 1990 no fancy add ons, some Apple IIGSes,
extra drives, monitors, Imagewriter printers. I'll check on Monday to
see how many of each are in the store room. Perhaps, next Saturday
morning we can clear the room.
Write to me at:
backofene(a)hotmail.com (not to the list) if you're interested and I will
send you directions.
Eileen
>
>We're located in northern VA, 7 miles from DC. The challenge is to get
>the old stuff in the hands of those who want it so it doesn't wind up
in
>landfills.
>We used to have "yard sales" to clear out the old stuff, but I got
tired
>of answering questions/complaints months later from people who bought
an
>entire system for $10, so eventually we just set the stuff out and let
>any interested people take it away. With our student population
>increasing, we're using every available space as classrooms.
>Write me at backofene(a)hotmail.com if you want to help us "take out the
>trash".
>
>Eileen
>
>
>>
>>> I checked the storeroom at school today to discover that all the old
>>> Tandy equipment (which had collected dust there for 2 years) has
been
>>> disposed of. Not even a keyboard left. All I could find is an
>>> assortment of Apple II GSes, drives, Imagewriters etc & a few old
Mac
>>> LCs.
>>
>>Where was this at? I wouldn't mind getting a IIgs setup but don't
want
>to
>>pay a lot of shipping since I can probably find them locally
>eventually.
>>
>>
>>--
>> _______ KB7PWD @ KC7Y.AZ.US.NOAM
>ecloud(a)goodnet.com
>> (_ | |_) Shawn T. Rutledge on the web:
>http://www.goodnet.com/~ecloud
>> __) | |
>\__________________________________________________________________
>>* Java * card-carrying member of the procrastinati * ham radio * Linux
>*
>>
>
>
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