16 Apr
2007
16 Apr
'07
12:54 p.m.
On Sat Apr 14 2007, Tony Duell wrote:
If you want to run the old programs and get the feel
of the machine
again, I am told there's a pretty good HP98x0 emulator on the web, and
I think it's open-sourve....
I've taken a quick look at this:
http://sourceforge.net/projects/hp9800e/
...and it seems quite impressive. I spent only a little time working with
it, but it appears to emulate the hardware and execute code dumps of the
actual 9800-series ROMs. Most of the option ROMs are included, as are a
number of peripherals. Worth a look.
-- Dave
16 Apr
16 Apr
1:26 p.m.
New subject: Help to identify a Selectric based terminal.
I received some Heathkit microcomputers (H8's) that included a nice, but
non-functional, Selectric based terminal. I cannot find any manufactures name anywhere on
it. Does anyone recognize it?
I would like to find out more about it and to try and get it working.
Thanks,
Bob
http://www.dvq.com/oldcomp/photos2/1k/selectric_term1.jpg
http://www.dvq.com/oldcomp/photos2/1k/selectric_term2.jpg
2:44 p.m.
New subject: Help to identify a Selectric based terminal.
I received some Heathkit microcomputers (H8's)
that included a nice, but non-functional, Selectric based terminal. I cannot find any
manufactures name anywhere on it. Does anyone recognize it?
It looks like the Heath colors from the H8 series. I suspect it is a
very limited edition of a Heath terminal.
IBM supplied the Selectric as an OEM printer assembly that was used by
several companies for a printing terminal.
I think it came out of the IBM Mag Tape and Card wordprocessors. Quite
a few people were hacking them for use in early 8 bit home computers.
Paxton Hoag
Astoria, OR
USA
17 Apr
17 Apr
1:48 a.m.
New subject: Help to identify a Selectric based terminal.
Paxton Hoag wrote:
It looks like the Heath colors from the H8 series. I
suspect it is a
very limited edition of a Heath terminal.
IBM supplied the Selectric as an OEM printer assembly that was used by
several companies for a printing terminal.
I think it came out of the IBM Mag Tape and Card wordprocessors. Quite
a few people were hacking them for use in early 8 bit home computers.
I originally thought it looked like an IMSAI product, which are blue in
color also. I don't think it has anything to do with the 2741 series either,
they look like a standard Selectric II typewriter. Also, this does not
seem to be an ASCII or EBCDIC terminal. There's no controller inside.
It looks like only a solenoid driver controlling some tilt/rotate
solenoids. I believe the 2741 had SLT boards inside. (don't know for
sure though).
Also, I have two IBM MAG card typewriters and this mechanism looks a bit
different. I guessing it's a bare bones IBM OEM chassis and used
a driver on the microcomputer to control it. Anyway, it's neat!
Bob
3:28 p.m.
New subject: Help to identify a Selectric based terminal.
In article <46245FC0.1090503 at sbcglobal.net>,
Bob Rosenbloom <bobalan at sbcglobal.net> writes:
I originally thought it looked like an IMSAI product,
which are blue in
color also. I don't think it has anything to do with the 2741 series either,
they look like a standard Selectric II typewriter.
Yeah, all the pictures I could find of 2741s look like a Selectric II.
The one I used looks like yours, I particularly remember that big part
that sticks out the back behind the roller. This is where the
acoustic coupler was mounted on the one that we had.
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
16 Apr
16 Apr
3:51 p.m.
New subject: Help to identify a Selectric based terminal.
In article <199631.2252.qm at web82708.mail.mud.yahoo.com>,
Bob Rosenbloom <bobalan at sbcglobal.net> writes:
Dude! That is very similar to the 2741-ish terminal that I used in
1979 and ran at 134.5 baud. I have been looking high and low for even
a picture of this puppy and you got one, you lucky bastard! :-)
Yours is slightly different from the one we had, to wit:
- ours had an IBM logo put directly on it on the front
- ours did not have the slide switches on the left front or right rear
- ours did not have the three circular indicator/switches on the right front
Ours was that same turquoise color. IIRC, the IBM logo plate was on
the front left where your switches are located. Of course this is
just based on my fuzzy 25 year old memories and not any actual
pictures of the terminal in question. It could have been nearly
identical to yours.
I also seem to recall that ours had a builtin acoustic coupler, but
that could also be a result of fuzzy memories.
If you want to unload that beast, just let me know as its something
I've really been looking hard for over the past couple of years!
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
6:18 p.m.
On Sat Apr 14 2007, Tony Duell wrote:
That's certainly the one I was thinking of...
If you want to run the old programs and get the
feel of the machine
again, I am told there's a pretty good HP98x0 emulator on the web, and
I think it's open-sourve....
I've taken a quick look at this:
http://sourceforge.net/projects/hp9800e/
...and it seems quite impressive. I spent only a little time working with
it, but it appears to emulate the hardware and execute code dumps of the
actual 9800-series ROMs. Most of the option ROMs are included, as are a
number of peripherals. Worth a look.
Yes. That's whu I looked at it. I am wondering about designing an EPROM
module for my HP98x0 machines (should be very simple, actually, the HP
ROMs had TTL compatible address and data lines, it' was just the CE line
that was odd (active high, and 12V level IIRC). The real HP ROM modules
had 4 ROM chips in them (high and low bytes for each of 2 areas with
separate select lines on the mdoule connector), I'd want to use 2 EPROMs
(high and low byte) and fiddle the selects so that the EPROM was split in
hald, one for each select line (if you see wht I mean). A trivial piece
of dseign, the hard part being making the PCB with the right edge
connector pattern.
Anyway, if I did that, I'd need to get some code to stick in the EPROMs,
and that emulator distribution seemed like the obvious place (FWIW, the
author of said emulator fully approvves).
-tony
6287
days inactive
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