>
>Subject: New find, Heathkit H89 computer.
> From: "Bob Shannon" <bshannon at tiac.net>
> Date: Sat, 23 Sep 2006 20:44:31 -0400
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>I've just come across a new vintage system.
>
>I've been given a Heathkit H-89 computer with some documentation and one
>bootable diskette.
>
>Its booting HDOS, but I don't have any HDOS specific documentation, just the
>'Operation' and
>assembly manuals (the 'Operation' manual is really theory of operation
>material).
>
>Does anyone have the ability to make a set of 'distribution' HDOS disks
>(100K floppy)?
>
>Is CP/M also available, or the Heathkit diagnostics disk?
>
>I've not been able to find much HDOS documentation on-line, does anyone have
>pointers?
CP/M was available. One thing, which disk controller does it have? If
memory serves there were several different ones between heath and aftermarket.
Allison
>
Hi,
I have a Nova 3 that I would like to get to know a little better.
I do not have any manuals and a quick search came up with
a dead end.
Info on testing and how to interface to the console port ??
(external term). Is it TTY or RS232 and of coarse which
pins or ???
Bruce are you out there ???? ;-)
Below is the card lay out
Thanks, Jerry
Function MFG No. EK No.
-12 Transport 4190/4041/4044 063-130
-11 FMDET 4190/4041/4042/4044 063-147
-10 <- B side oneida, Vanes A side -> MBD 4042 063-131
-09
-08 Disk Cartridge Controller DG 6030
-07
-06
-05 Mos Memory DG 8543
-04 Cassette I/O DG 4075 4077 4078 4079
-03 Mos Memory DG 8543
-02 Nova 3 Triple options bd. DG 8553/8531/8535
-01 Nova 3 CPU DG 8530/8531 W/ARST. APL
Try the following link:
http://marina.mfarris.com/theref/theref.html
Text from the search engine:
> TheRef(tm) is also available in file form. The latest version is 4.5a,
> released on 6 May 1996, which is a partial update to the last full
> version, 4.3. ...
Has info on FDD, HD and optical drives. As it says above "available in
file form", but I did't look for it when I was there just now. If it
is not available anymore in file form, I have the files from downloading
them back in 1997.
Mike
> Date: Sat, 23 Sep 2006 20:44:31 -0400
> From: "Bob Shannon" <bshannon at tiac.net>
> Subject: New find, Heathkit H89 computer.
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Message-ID: <001e01c6df72$d19c6030$0100a8c0 at screamer>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> I've just come across a new vintage system.
>
> I've been given a Heathkit H-89 computer with some
> documentation and one
> bootable diskette.
>
> Its booting HDOS, but I don't have any HDOS specific
> documentation, just the
> 'Operation' and
> assembly manuals (the 'Operation' manual is really theory of
> operation
> material).
>
> Does anyone have the ability to make a set of 'distribution'
> HDOS disks
> (100K floppy)?
>
> Is CP/M also available, or the Heathkit diagnostics disk?
>
> I've not been able to find much HDOS documentation on-line,
> does anyone have
> pointers?
>
>
Come on by and visit us at www.sebhc.org , a site dedicated to the
Heathkit 8-bit computers (mostly H8 and H89, but the 680x trainers as
well). We have extensive online archives with docs and software. Also,
be sure to take a look at Eric Rothfus' SVD ( www.thesvd.com/SVD ) which
includes HDOS and CP/M boot images ready to plug and ply on the H89.
Jack
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>
>Subject: Re: 360kB HH Floppy Drive
> From: "Charles E. Fox" <cfox1 at cogeco.ca>
> Date: Sat, 23 Sep 2006 16:33:21 -0400
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>
> Is there any easy way of telling a 360 K from a 1.2 Meg? I
>have a bunch of 5 1/4 drives.
>
> Charlie Fox
Yes. The model numbers on the drive.
360k drives are 40 track, 2 sided 48tpi.
Here are a few...
For Teac:
FD55A Full height
FD55B 48tpi 40 track two sided
FD55c ????
FD55D ????
FD55E 96tpi 80 track single sided.
FD55F 96tpi 80 track two sided
FD55G 96tpi 80 track two sided dual speed
Fujitsu 2851A 40 track 2 sided
Toshiba 5425 40 track 2 sided
Shugart
SA400 35 track 1 side full height
SA400L 40 track 1 side full height
SA450 40 track 2 side full height
Allison
> From: Jim Brain <brain at jbrain.com>
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
> Date: Fri, 22 Sep 2006 17:10:39 -0500
> Subject: Re: Commodore keyboards and PCs
> Technically, C=Key is designed to work inside a perfectly functional C64
> or C128. If the 64 is on, it will convert PS2 inputs to C64 keypresses
> (in combination with the current 64 KB). If the 64 is off, it will
> convert the C64 KB actions to PS2 KB events.
I was thinking... isn't the PS/2 keyboard protocol simply a
low-bitrate serial protocol at TTL levels? Could the 6510 then not
act as the microcontroller?
That is, why not connect the user port to the PS/2 port and run a
program on the C64 to send the keypresses to the PC?
Of course, this runs dangerously into the direction of a "why use an
emulator if you have the real thing" kind of debate... :-)
Joe.
I seem to be getting interested in HP9000/200 stuff....
So far I've got (IIRC) :
HP9816 with the compact keyboard. This has 768K RAM (256K on the CPU
board, 2 off 256K RAM boards, one in each DIO slot).
HP9817 + HP-HIL keyboard and monitor. 2M RAM (2 off 1M RAM cards), text
and graphics video boards. And therefore 2 empty DIO slots, both with
external access [1]
[1] These machines have expansion slots called 'DIO'. Some cards have
brackets with connectors on them, for example an RS232 board. The spacing
of the slots in the backplane is half the height of the connector
bracket, so such cards go in every alternate slot. The intermediate slots
can be used for RAM cards, the DMA controller, and so on. The video card
in the 9817 takes a pair of slots, the text card has a bracked with
aBNC connector fro video output, the graphics card fits in the slot
immediately above it, and carries a ribbon cable that links to the text card.
HP9836A. This one is hard to get to at the moment, so I am working from
memory. I think it has 1M RAM (4 off 256K cards), and therefore 4
avaialbe DIO slots, all with external access. I have the monitor, and of
course it has 2 built-in 5.25" floppy drives.
Assorted DIO cards. The useful ones are a couple of GPIOs, a low-speed
HPIB DMA controller,, and an RS232 card. The last will almost certainly
end up in the 9836, which doesn't have RS232 as standard (my other 2
machines do).
As regards drives, I have a 9122 with the normal grease problem (hut the
heads are OK). I can probably find a few 9121a, a 9133H, and a 9154, if
they're going to be useful.
I also have HP BASIC 5.0 and 5.1 on original 3.5" disks.
I'll prboably use these machines (as far as I use them at all) in much
the way HP intended -- as control/logging systems.
Questions :
1) What softwware do people recomend? HP BASIC looks reasonable,
actually, it does at least support named procedures with formal
parameters. Anything else reocmended?
2) How much RAM do I reasonably need. If I pulled one of the 256K cards
>from the 9816 so I could add a DIO I/O card, would the machine still be
useful?
3) I've been reading the 9836 service manual [2]. I makes reference to
the 'Developer's Documentation' or some such, which apparently contains
information for people who want to design DIO cards and/or port OS's to
the machines. Does anyone have this (it's not on bitsavers or the
Australian museum that I can see). It certainly sounds like something I
should read if I can.
4) Anything elase I need, or should keep an active lookout for?
[2] Yes, it's a boardswapper guide. No, I don't approve of boardswapping.
But that doesn't mean I don't read the manuals. There are some useful
points in it.
-tony
>
>Subject: Re: CompuPro floppy controller differences
> From: ard at p850ug1.demon.co.uk (Tony Duell)
> Date: Fri, 22 Sep 2006 23:42:29 +0100 (BST)
> To: cctalk at classiccmp.org
>
>> >Are they really that common in the States? They are not at all common in
>> >the UK any more, so don't think of that as being a source for 50Hz pulleys...
>>
>> If you were her than 50hz pulleys are a non issue. ;)
>
>Sure, but if anyone was mad enough to bring their collection across to
>England, they would not be able to find the right pulleys...
>
>>
>> Lifes rough. The solution I used once for a 50hz and later a 400hz motor
>> was a simple transformer output pushpull amp fed with a wein bridge osc,
>
>Sure.
>
>I am told (and probably have the service sheet for) there was an AC/DC
>mains radiogram sold in the UK that had an AC motor for the record
>turntable. There was a unit, only used on DC mains, that consisted of 3
>valves, acting as an oscillator and push-pull output (the last 2 valves
>were probably 50L6s.). Of course there was no HT rectifier, since it was
>only used on DC mains (The radio/amplifier section was the normal
>series-string heaters and half-wave rectifier type of thing).
>
Not the same thing though may be the same idea. What I have is a unit I
designed as a variable frequency power source (115-125VAC) self contained
that runs off line power (has own PS) and run AC motors to 100W in the
range of 25-500hz. Very handy for older audio tape decks that are
slightly off speed or if you slew the tape while hearing it (off speed).
Mine is a proto I built 30 years ago and the production version was used
to run a 3M 1" 8track commercial deck for studio use. Many of the multitrack
decks had DC motor contros but not all. That variation allowed for a
computer interface to alter speed off spec to find and sync timecodes on
the tape. The controller also managed the deck for FF, forward, rewind,
speed select and stop. Very impressive to see two decks running 14 tracks
of music and this would sync both perfectly or offset as desired
(for effects). That system used sinewave drive to keep noise out of
the system as we found square waves worked fine but the amps and all
tended to hear it.. and harmonics of it.
I also have a smaller version that runs from 12V battery for smaller
motors to 30watts. Most motors tolerate a squware wave source so
efficientcy can be very high. The trick of running AC motors off
variable frequency also is used for my antenna rotator (ham radio) so
I can make large changes in azmuth with acceleration and deceleration
as most rotator are AC motors and the antennas have some interta
(15 and 18 foot booms). This also has a microcontroller (8749) to
manage the position and motor controls.
Doing it with a solidstate converter is far more efficient than motor
driven alternators for frequency conversion at low power. Much quieter
too. I've since seen the same thing for done for large (10hp and up)
motor controller.
The whole show comes from the days of doing audio consoles both analog
and early digital.
Obviously the method could also produce 230V AC if desired. So 50hz pulleys,
no problem!
Allison
intererted if it works...located in NE Pennsyltucky LOL
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I need to get rid of an Amiga 2000. Any interest? IF there's a few buck in
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-T
