VOGONS


Reply 40 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

Anyone have any idea what jumper locations J11 and J9 might do? They are unsoldered on my board, and not mentioned in the manual. If I had to guess, I'd say J9 probably controls DRAM wait state 0/1, and J11 might be duty cycle 33%/50%.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 41 of 52, by Robin4

User metadata
Rank l33t
Rank
l33t
Anonymous Coward wrote on 2021-09-25, 09:33:

Anyone have any idea what jumper locations J11 and J9 might do? They are unsoldered on my board, and not mentioned in the manual. If I had to guess, I'd say J9 probably controls DRAM wait state 0/1, and J11 might be duty cycle 33%/50%.

Maybe set the processor type?

Intel 8086 or V30?

~ At least it can do black and white~

Reply 42 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

That would basically be setting the duty cycle. 8086 is always 33%, and V30 can be either 33% or 50%.

I soldered in the two jumpers. J11 doesn't seem to do anything as far as I can tell. J9, when open (the default is closed) causes the system to not boot up.

Memory wait states can be adjusted using chipset registers according to the manual.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 43 of 52, by Jed118

User metadata
Rank Oldbie
Rank
Oldbie
Anonymous Coward wrote on 2021-09-21, 13:21:

I got a receipt from CPU Shack. You can always just send him a PM to find out.

Did that, ordered the FPU (and another CPU) and it's on its way 😁 Thanks!

Youtube channel- The Kombinator
What's for sale? [https://www.ebay.ca/sch/the_kombinator/m.html … =1&_ipg=&_from=] my eBay! [/url]

Reply 44 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

I won't be able to pick mine up for quite a long time. When you get yours, let me know how it goes in terms of performance, heat production, and ability to overclock.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 45 of 52, by Jed118

User metadata
Rank Oldbie
Rank
Oldbie
Anonymous Coward wrote on 2021-09-30, 00:10:

I won't be able to pick mine up for quite a long time. When you get yours, let me know how it goes in terms of performance, heat production, and ability to overclock.

OK - not sure I'll get to it right away (still don't have the package) as I am busy with my PS/1000 and hah, life, but yeah, will do, I have a thermal scanner. Did you have any specific benchmarks or tests you'd be interested in?

Youtube channel- The Kombinator
What's for sale? [https://www.ebay.ca/sch/the_kombinator/m.html … =1&_ipg=&_from=] my eBay! [/url]

Reply 46 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

8087 is usually stressed for stability using Autocad. I suppose you might also be able to use FRACTINT. I'm not too concerned about benchmark results (Though that might be interesting), but I would like to know if the FPU is stable at speeds exceeding 1oMHz.
I think I read these D9008D FPUs are also 387 compatible, so it would be interesting to see if it would be possible to test that.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 47 of 52, by Jed118

User metadata
Rank Oldbie
Rank
Oldbie

And, no luck initially - 87test.exe failed to load with the native DOS 3.3, and on a 6.22 boot diskette it at least ran, but with divide overflow errors (can CTRL-C out of it).

I moved the jumper J10 1-2 and the system didn't POST. Syschk tells me there's no FPU - I'll try a few more things just now.

Youtube channel- The Kombinator
What's for sale? [https://www.ebay.ca/sch/the_kombinator/m.html … =1&_ipg=&_from=] my eBay! [/url]

Reply 48 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

I heard d9008d may be 8mhz natively. You can try de-turboing to see if it helps.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 49 of 52, by Jed118

User metadata
Rank Oldbie
Rank
Oldbie

General apologies for the poor image quality, I bought a $60 smartphone to do three things - call from, text from, and use for 2FA. I did not consider the camera at all. Welcome to 2004.

BEHOLD!

CYXvqbT.jpg

So I ran sysinfo off an old boot diskette and I got this:

w4HRNH5.jpg

Followed by this:

PQN7XaX.jpg

Checkit tells me this:

53zCLzl.jpg

But sometimes it'll also call it a V20.

Beginnings of Alzheimers?

87TEST run from native DOS 3.3

S90VXQT.jpg

When run off a 6.20 DOS it does this:

0EuRdiT.jpg

The second line keeps populating with zeros and beeping wildly. CTRL-C exits and returns to DOS.

Some weird stuff happened to the system at some point - I tried to edit my autoexec.bat and config.sys files using DR DOS 7.03 (because I forgot how to EDLIN) to install an SCSI CDROM run off a Future Domain card(yeah, that didn't work) and the files vanished. Kind of. DIR didn't list them, but TYPE did. I got them back by running EDLIN and the file name, then issuing the END command. They then appeared in the DIR listing. Also, A:\ drive won't update the DIR listing when a new disk is inserted - you gotta take it out, DIR again, wait for it to fail, then put a new diskette in - with or without co-pro. This a DOS bug, or something with the floppy controller (which has its own BIOS)?

Messing around with the FPU on YouTube - https://youtu.be/8A_dCCx7XLk?t=1255

https://youtu.be/8A_dCCx7XLk?t=1683 87Test results.

(the sound card does work, there's a Sierra card game on the hard disk 😉 )

Youtube channel- The Kombinator
What's for sale? [https://www.ebay.ca/sch/the_kombinator/m.html … =1&_ipg=&_from=] my eBay! [/url]

Reply 50 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

Your video is kind of a mess and pretty hard to follow.
From what I take, your system does boot up with the D9008D installed, so that's good I guess.
I've never tried 87TEST so I can comment on what normal behaviour should be. Maybe it's supposed to beep like that? In any case the tests that it ran were all passed. Not sure what test 5 and 6 are all about. Maybe they're for 387s. Do you have any documentation for 87test?

The other weirdness that you've been experiencing, is that FPU related, or something else?
I remember there is an extra jumper for the FPU in addition to the one on the main DIP switch bank. For whatever reason J10 has settings for "Normal Mode" and "Coprocessor 8087 mode". I remember with a real 8087-1 my machine acted funky in "Coprocessor 8087 mode", but worked fine in "Normal Mode".

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 51 of 52, by Jed118

User metadata
Rank Oldbie
Rank
Oldbie
Anonymous Coward wrote on 2021-10-06, 10:54:
Your video is kind of a mess and pretty hard to follow. From what I take, your system does boot up with the D9008D installed, s […]
Show full quote

Your video is kind of a mess and pretty hard to follow.
From what I take, your system does boot up with the D9008D installed, so that's good I guess.
I've never tried 87TEST so I can comment on what normal behaviour should be. Maybe it's supposed to beep like that? In any case the tests that it ran were all passed. Not sure what test 5 and 6 are all about. Maybe they're for 387s. Do you have any documentation for 87test?

The other weirdness that you've been experiencing, is that FPU related, or something else?

Yeah, it's an unrehearsed live stream, just "do". I don't have time to make proper vids anymore 🙁

87TEST is what VWestlife used here:

https://www.youtube.com/watch?v=jiPEg2_EZ10

The PC's weirdness is, AFAIK, not related to the FPU. Could just be buggy copy of DOS (I seem to remember my 286 doing something similar with diskettes, running 3.3 as well), but the system does work well after it has "warmed up", like an old carburetted car. I'll have to investigate it (lol when I have time).

I remember there is an extra jumper for the FPU in addition to the one on the main DIP switch bank. For whatever reason J10 has settings for "Normal Mode" and "Coprocessor 8087 mode". I remember with a real 8087-1 my machine acted funky in "Coprocessor 8087 mode", but worked fine in "Normal Mode".

Yup, J10 is set to 2-3 (for "normal mode") works just fine with a real 8087 as well as the D9008D, and will not post in "coprocessor mode" (1-2, J10) with the D9008D, so your results match mine.

The extent of the 87TEST documentation is:

87TEST.EXE tests your 8087 (or 80287) numeric co-processor for accuracy, ability to handle "stress", and integrity. Fluctuation […]
Show full quote

87TEST.EXE tests your 8087 (or 80287) numeric co-processor for accuracy,
ability to handle "stress", and integrity. Fluctuations in temperature
and other factors can affect the numeric co-processor's operations.
Therefore, in order to have confidence in the reliability of your program
results, we suggest that you run 87TEST during boot-up and both before
and after critical applications.

87TEST prints the results of its tests to the screen. When a failure occurs
it also sounds the beeper, to alert you to the problem. If the numeric
co-processor is not installed or is improperly installed, the program will
print a message to the screen saying so.

The program can run in two modes, either single-shot or continuous.
To run it for one pass, type 87TEST <enter>
To run it continuously, type 87TEST C <enter>
To break out of the 87TEST, hit any key or Ctrl-C.

Now I'm going to find some diagnostic tools and run some more tests 😉

Youtube channel- The Kombinator
What's for sale? [https://www.ebay.ca/sch/the_kombinator/m.html … =1&_ipg=&_from=] my eBay! [/url]

Reply 52 of 52, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

I remember there was an FPU test that checked for the IEEE-754 compliance. It may have been the one that came with i387 and 287XL FPUs. That would be an interesting one to run on the D9008D.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium