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| Author |
Message |
| 25 new of 205 responses total. |
twinkie
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response 175 of 205:
| 
Jun 12 14:53 UTC 2002 |
32-bit and 64-bit graphics processors.
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keesan
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response 176 of 205:
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Jun 12 19:27 UTC 2002 |
Is the 64 noticeably better at something than the 32? In a not-terribly-fast
Pentium (133MHz or 75MHz AMD 5x86 pseudo-pentium)? I suppose we can time how
long it takes a large tiff to display.
I just tested out Trio64 and it works fine with WP graphics and text drivers
for S3 and also with VESA driver for WP - seems to be 100% VESA 2.0
compatible.
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twinkie
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response 177 of 205:
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Jun 12 19:31 UTC 2002 |
It's faster when it comes to rendering 3D graphics, but you wouldn't notice
much difference otherwise.
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keesan
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response 178 of 205:
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Jun 13 01:35 UTC 2002 |
Well, I got together the following S3 VESA 1.2 cards:
Trio32 with 1M RAM
Trio64 with 2M RAM (EDO)
Verge with 4M RAM
On the same Pentium 75 they displayed a 600K tif as follows:
Trio32 3 sec
Trio64 4 sec
Verge 5 sec
The tif was 256 color. Why does more RAM slow it down?
The extra RAM makes a big difference in resolution and colors.
Trio32 (1M) goes to 1024 at 256, 800 at 64K, 640 at 16M
Trio64 (2M) goes to 1600 at 16 colors, 800 at 16M
Verge (4M) goes to 1600 at 256, 1024 at 16M
We recycled the XT with CGA/EGA card and 25M MFM hard drive, but kept the 360
floppy drive. We recycled the DX33 with full-length 2-slot EGA card and bus
mouse card and kept the 1.44 floppy drive that fits it a 5.25" bay, also the
controller card (a slow one) and power supply for testing motherboards. The
P75 works perfectly. The P100 has trouble accessing the 1.2G hard drive -
it sometimes works if you are in the same directory as the file (not enough
for it to be on the path) but seems to get progressively worse. Is something
heating up? Either a bad controller or a messed-up hard drive, and we will
try another HD in the same computer as a test (the 80M from the 486).
This P100 was quite rusty. The remaining computers, probably pentiums, are
mostly missing things like CD-ROM, floppy disk, video card, etc.
We found Autocad for DOS 10, and Autocad for Win3x 13, and Professional
Writer, and lots of copies of Xtree Gold and Norton and Symantec utilities,
and various menu programs.
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twinkie
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response 179 of 205:
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Jun 13 05:47 UTC 2002 |
Were you running the same resolution on all three cards? I would have expected
your times to be in reverse order.
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keesan
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response 180 of 205:
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Jun 13 13:26 UTC 2002 |
Yes I was, did not change any settings of any sort. It was a 600K tif that
filled the screen in Pictview, 256 colors. I repeated this several times to
be certain. Perhaps cards that will display more colors take longer to
process the same info?
This morning I took scandisk over to the P100 on a floppy disk. It took a
long time to start running then informed me that there was a problem with the
directory structure in Cluster 2 and deleted C:\DOS for me, and marked that
cluster with a B for BAD. THe next 200M were okay and the other 800 were
empty. I read some of the company documents (with interesting terminology
about machine parts I had never heard of) in WPWin, which I have not used.
No CAD on this machine. It now runs about 10 times as fast and works just
fine. Simple fix. Needs DOS replaced.
The SiS Tseng ET4000 1M video card crashes whatvga.exe, but so do some of our
other cards. It displays our tif in about 3 seconds or maybe 4 (I count
instead of fetching the clock, which needs a new battery anyway).
On the way out I noticed an HP Deskjet 540 complete with manual that is
'non-working' - our favorite status for old computer equipment that we have
enough of already, and an enormous tower carefully placed so as to let the
door open out. There is supposed to be an HP dot-matrix printer too. Two
out, three in.
My correspondent about WPDOS informs me that there is now a universal VESA
refresh rate setting program for use with the newer video cards, but I don't
have any of those. I was able to set refresh rates either with the
Zenith/ATT/NCR Phoenix BIOS (as 'monitor type') or with Cirrus utilities.
Do most CMOS setup programs in newer computers let you set monitor type? Have
not checked out Trident or Tseng utilities for this and I did not find any
for S3. Win95 sets things to 60Hz, and my BIOS or Cirrus go much higher.
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keesan
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|
response 181 of 205:
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Jun 13 17:47 UTC 2002 |
Jim refilled three HP cartridges with the proper ink. Two worked, one did
not print. Unfortunately that is the one our friend took home. It had not
been filled for a few months. He said he tried everything he could think of
to get it working and then I suggested he follow the instructions - soak head
in hot water. He brought it back. Jim got the ink to flow by soaking in
solvent but said the print head was mashed. I suspect the friend banged on
it. He will replace it, but does anyone at grex who does NOT want to refill
cartridges have any for HP 700 or 800 series (or even 500 series) that they
can give us? The cartridges are xxxx45A (Jim won't tell me the first few
numbers) and hold 40 ml and have a little fill gauge.
We have been promised a bunch of 486s to recycle and some SIMMs. One friend
who we were hoping would want to upgrade called just now and assked how to
recycle his 386 and 486 as he was about to be given a pentium.
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mdw
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response 182 of 205:
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Jun 14 05:02 UTC 2002 |
As far as I know, there's no direct relationship between Apollo Domain &
HP/UX. At one point, the two products existed at the same time, sold by
separate organizations. HP/UX was a wildly weird version of Unix, with
a completely redone directory structure (. and .. did not even exist on
disk). Apollo Domain was not Unix at all, but its own weird entity,
with some interesting advanced concepts in it ("location broker") but
basically incompatible with Unix. I was fortunate enough not to have to
deal very much with either. I vaguelly recall seeing some sort of
portable HP machine running HP/UX with a 68k and a plasma display.
|
keesan
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response 183 of 205:
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Jun 14 12:22 UTC 2002 |
Back to Leeron's computers. Jim fixed the HP 540 by scraping off some
corrosion. We found a working Pentium 90. There are two mostly working
133MHz machines - one had a non-attached very noisy power supply which needs
the fan replaced, one had the printer port falling out. Another has a
keyboard connector problem and another won't work with floppy drive. We were
given two spare possibly working motherboards. These last to have faster cpus
(233 and 266MHz which we can put into the first two). A fifth has no cpu.
The sixth (not checked) has serial port falling out. No RAM, some have
batteries, missing most or all cards and drives. A final one needed a
password until we removed the battery - I think that was 150MHz but it got
late and I forget. I fixed the P100 by running scandisk, so once we replace
a fan and install boards and drives, we will have working P75, P90, P100, and
two P133 (if I look up the manuals we can upgrade the speed on these two).
We can replace the DX4 and AMD 5x86 that we just finally put into use, and
give three to friends, and who knows, maybe we can get another three going.
Our prize finds have been: two 360K floppy drives, two 5.25" 1.55 FDs, a 2.5G
hard drive, two 32M SIMMs, two 4M video cards, one PCI sound card, a 233 and
a 266M cpu that might work, and a switchable MDA/CGA card. (The double wide
EGA was bad and the CGA/EGA not of much use). We may try putting the fastest
cpu with the biggest memory and best sound card in an internet radio.
Recycled three older computers and lots of boards. Leeron brought us the
newer stuff first and there may yet be twice as much to come. Saturday
another former Kiwanis volunteer and grexer will help take things apart and
maybe upgrade from the P90 that we built him last year.
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jaklumen
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response 184 of 205:
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Jun 14 17:41 UTC 2002 |
An internet radio? what, a computer devoted to internet radio, or is
there an actual separate applicane?
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keesan
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response 185 of 205:
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Jun 14 23:48 UTC 2002 |
A Win95 computer devoted to playing the radio (once we find a working 900 MHz
phone so people can phone me from the other line) and to running a scanner
and printer that won't work in DOS, and to accessing websites that require
javascript (such as K-Mart's). I usually manage to get around javascript,
and today found the manuals for two motherboards that we had four of each.
We were thus able to move cpus around and set them for the right clock speeds
and multipliers. We took a good cpu out of a dead board, and then got another
board working to replace it. So all our pentiums are fixed in various ways
but need parts added and that may be tricky. Some had wrong settings, some
had pieces falling out, one needs a quieter fan. One still has wrong settings
for speed and voltage and the modem is set to all the IRQs instead of one and
WIn98 is on it but takes 40 minutes to load itself and found new hardware when
we had not put any in. Jim is still out there testing a motherboard using
jumper settings off a similar one and the same speed cpu. I got hungry.
Not sure what we will do if we get 10 pentiums working (at mostly 75-133MHz
which nobody but us thinks is a speedy upgrade), but we have three friends
who might want one each, to upgrade from a P60, a 486, and a nothing.
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keesan
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response 186 of 205:
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Jun 15 01:32 UTC 2002 |
Looks like we may not get these all working. Jim discovered while moving fans
around that they don't all work (cpu fans) nor do the power supply fans. HE
has started taking one apart to clean and lubricate it.
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keesan
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response 187 of 205:
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Jun 15 13:33 UTC 2002 |
We have been promised two more DFI power supplies that have noisy fans, to
replace the non-DFI with the noisy fan, and a bunch of other interesting
things like broken laser printer and two more non-working pentiums with
similar problems to the others. Jim is currently trying to figure out why
the HP cartridge that he overfilled, which leaked, is in a printer which now
will not do the whole self-alignment tho it did before. He cleaned up the
leak, he thinks. I managed to download the second motherboard manual and
discovered that when the pdf was converted to text the formatting (tables)
was all scrambled. I suspect sloppy typing by someone which pdf hides and
the convertor cannot handle properly. Also some pages are triple-wide, so
I gave up trying to deal with them with a text editor (from DR-DOS) or even
WP/DOS (20 cpi, 132 columns text mode) and looked with ghostscript for DOS.
They are full of tables and figures so will benefit from having the images
in them anyway. (I remembered how to view, now can I remember how to print?).
We will test the HP Deskjet driver on ghostscript and our HP 540 that Jim just
fixed and needs to refill, and then maybe on the Canon Multipass bubblejet
as an Epson LQ1500 (in DOS mode - push 6 buttons first).
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keesan
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response 188 of 205:
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Jun 16 14:01 UTC 2002 |
Leeron dropped off a pile more computers, most of them to be recycled. Two
more possibly fixable pentiums (noisy power supply, bad keyboard connector),
a 486, a 386 (with dentist software), a couple others, and a large flat server
that was upgraded to 486 and has a card in back to plug in about 10 terminals.
We have at least that many network cards. Does any grexer want it free? It
is probably working. We have a large tower also good for a server that needs
a motherboard but has floppy drives. Four large bays, 8 expansion slots, lots
and lots of places to put ports. Let us know within a week.
Our first set of Pentiums included 6 cases and three spare boards that were
VPS and ITBD. Ther former motherboard is older (no DIMM slots) and runs at
75MHz, the latter runs slower (66MHz?). I have to figure out from the manual
(once I manage to print it) whether you can also set the motherboard at 50,
60, 66 and 75. THis might explain why one board with a 233 INtel cpu is
running at 259 and recognizing the cpu as 300. (The CPU came from a
nonworking motherboard and went into a motherboard missing its cpu, after we
checked jumper settings in a text version of the pdf manual and lined up all
the misaligned columns first). Also might explain why the three with Cyrix
cpus are actually running at their clock speeds of 133 and 166 instead of of
80% of those as in the board JEP gave us.
Leeron seemed to imply that you are supposed to set the board to match the
actual clock speed of the cpu (which is 60 or 66, I think) but boards and cpus
seem to work at various settings, such as 1.5x66 or 2x50 for a 100MHz. Any
other opinions? The 233 would be 3.5x66 or about 3x75. We discovered that
1.5x66 runs faster than 2x50 for a 100MHz cpu.
Bill Hosmon came over to help and to diagnose a clock radio with a faintly
buzzy speaker (sounded like paper when you blow on its edge). Did not seem
to buzz when held upside down so not electronic, nor did the buzzing get worse
at lower pitch (not a rip in the surround). Opened the case and found a
15-year layer of blanket-type fuzz and removed it. Like dryer lint. Bill
will report if it buzzes again.
We tested a 'probably bad' floppy drive and hard drive and video card in a
minimal 'computer' made of an oddly-acting pentium board (recognizes a pentium
166MHz ad 486 SLC tho set to 166 MHz), and the power supply and controller
card and drives from a recycled 486 (had a bad EGA card), and showed Bill how
NOT to plug in the floppy drive power backwards. The drives worked, video
card did not. Replaced a missing bolt in the card, then Jim reseated the
chips and one was not all the way in. Now it works. That and chatting with
Leeron about why dentists and others keep their computers for ten years and
then give them to him to find a good home for, etc., took up the afternoon,
along with admiring some DOS based dental software (under Win31, on a 386,
patiently) that explained how teeth are numbered starting in upper right and
progressing to left then bottom left and bottom right. And looking at
Afterdark screen saver's optimistic portrayal of a big city skyline complete
with LOTS of stars in the sky.
We finished the day with a trip to Hong Kong Inn, joined by krj (who is
working on a different computer), where we saw posters of the night skyline
without a single star.
Jim is working on a 2-floppy-disk set of F-PROT for DOS that will check for
memory and boot record viruses and then install itself to hard drive before
running the rest of itself to check files. We have never had viruses in
files, just memory and boot record (Monkey B, and several others donated to
Kiwanis). It is also supposed to work on a TTL monitor. His little batch
file is full of little bugs but the main problem seems to be finding a 1.44M
drive with few enough bad sectors to hold all the files.
About 95% of our 1.44M files have bad sectors, 50% of the 720 and almost none
of the 360 (tho once in a while they go bad - unusable, or need to be
reformatted to read them).
Leeron promises us the other half of the computers once these are recycled.
He already brought all the newer ones but who knows, we might run into some
nice MDA cards or 5.25" 1.44 floppy drives in the older ones again. We are
missing the cages for the floppy drives that people removed, so will have to
use the larger ones in some computers - anyone have extras?
Jim fixed an external CD drive by shaving off some plastic in the case that
had warped and was blocking the opening a bit. He says this is common. It
worked once he took the front cover off.
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keesan
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response 189 of 205:
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Jun 17 04:57 UTC 2002 |
If a computer will not dial and connect with certain software, but works with
other software, with the same modem that worked with all this software
(various DOS dialing programs and browsers) in another computer, does this
indicate a bad motherboard? Internal modem, disabled Com2. One problem is
an ATT pentium with Win95 that dials but won't connect, using the same modem
that was working in an identical ATT with the same copy of Win95 (until the
computer died due to CMOS failure). Settings are the same as in another
computer which dials fine. It says to change my server settings.
Other problem is a modem used with DOS, taken from a computer where it did
everything, and in the new computer, same software and init string, it works
with PCPlus, Kermit, Nettamer, but not DOSPPP. Won't load packet driver.
Arachne (also DOSPPP) I think did not initialize the modem, don't recall.
This is the same computer that for a while would not find b: or the modem at
all but does so now (except for DOSPPP).
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keesan
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response 190 of 205:
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Jun 17 14:13 UTC 2002 |
Arachne uses Miniterm, and today that dialed and connected. There is also
a netdial.exe around. I have asked the author of lynx to help me put together
a batch file for lynx based on one of these instead of dosppp.
We were given a hard drive marked ? which sort of works. If you boot from
c: everything is fine. If you boot from a: it will not change to c: and Syschk
finds a primary master but no c: logical drive. A laptop computer is having
the same problem. How can it boot from c: if there is no logical drive?
Is this a defective hard drive? Would it help to reformat it?
Another former Kiwanis volunteer who is moving will be dropping off his
rescued 486 collection (8 of them) and showing up two weeks later to learn
how to recycle them (he forgot, after having helped with 10 ATTs). He also
wonders how to use a Linux pentium given to him with login root (ROOT?)
and password 'empty'. What exactly does he type where? He has probably
not used Linux as he called it Linus. And he wanted to recycle his 'terminal'
(monitor). He is hoping to give his ninth 486 to the kid next door.
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keesan
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response 191 of 205:
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Jun 17 15:43 UTC 2002 |
I have somehow succeeded in rewriting a batch file from Bobcat (lynx for the
386) based on netdial to work with CUTCP telnet program, and LYNX for DOS
(I can now dial, then load lynx, then quit, then unload settings, then telnet
or ftp) so that it all works together. IT seems quite a bit simpler to me
than how the author set things up with dosppp and Kermit telnet, and it dials
and connects and loads the packet driver in my new computer every time.
If anyone wants help installing a very small DOS_based dialing program that
will let you ftp and telnet from a floppy disk, let me know. These three
programs can be used without lynx on a slow XT laptop, I hope.
I have no idea why the hardware that worked in one computer won't work in a
newer one with the same software, but Netdial works all the time and the other
dialer DOSPPP worked on the second or third try in one computer and not at
all on the other computer.
This leaves a WIn95 computer that won't dial and connect with Netscape, using
the same hardware (identical to a former computer) and software that worked
before. 'I hate Windows'.
Does anyone want a 486 server with space to plug in 10 terminals, free?
Or ten more 486s due to be dropped off for recycling by a former Kiwanis
volunteer who will come back in two weeks after he has moved?
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keesan
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response 192 of 205:
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Jun 17 16:28 UTC 2002 |
What do the numbers mean in the following netdial.scr?
Around noon netdial stopped loading the packet driver after connecting.
So I suspect the last line with a number in it needs to be changed to wait
longer. We had to lengthen times in a kermit script when using it with
a slower computer.
# PAPLOGIN.SCR: For IP server that does not
# send login prompts, and then requires the packet driver to do
# Password Authentication Protocol (PAP).
# See readme.doc for information on using the +ua switch for epppd
send "at&f1 s15=128\r"
recv 6000 "OK"
recv 500 ""
send "atdt489-5000\r"
recv 60000 "CONNECT"
recv 1000 "00" What might this line mean?
^Z
If I dial and connect, but it does not load packet driver, then I run
the same dialing batch file again, it asks for host name and the program
gives it the init string instead. SO it looks like it is still asking for
the host name, which is in some other file to which 00 may be referring.
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keesan
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response 193 of 205:
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Jun 17 18:32 UTC 2002 |
Got it working. Needs epppd to load the packet driver, as well as netdial
to dial. I had removed the line ;epppd thinking that I was remarked out.
Batch files use : . Dumb mistake.
The dialer including netdial and epppd with related files is 65K.
Telnet is 208K, ftp 132K, config.tel and ip-up.bat a few K each.
I cannot quite fit it all on a 360K floppy, but 720 works fine.
No graphics, no menus, fast (once it is working). Should work on an XT.
Lynx itself is another 742K plus 140K .cfg file (most can be deleted).
I have run it on a 3M 386 SX but not from floppy disk.
I still don't know why these programs time out. Netdial timed out once in
20 tries, miniterm about 50% of the time, epppd dialer most of the time.
There are many time settings which I tried to adjust with no luck.
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gull
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response 194 of 205:
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Jun 17 18:35 UTC 2002 |
Re #190: Sounds like maybe the drive has some kind of "disk manager"
software on it. This was pretty common on drives too large for older
computers to support them. A program in the boot sector would load into
memory when the computer was booted from the drive and install a little
driver to make things work right.
If you don't care about the data on the disk and have a machine that can
handle large drives, boot from a floppy, do "fdisk /mbr", then reformat the
hard disk. It'll work normally after that. (The "fdisk /mbr" overwrites
the disk manager software in the master boot record.)
Re #192: The 'recv 1000 "00"' may be looking for a speed reported by the
modem, or the beginning of a PAP initialization. I'd try commenting it out
(by putting a # in front of it.)
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keesan
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response 195 of 205:
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Jun 17 21:17 UTC 2002 |
Your guess sounds reasonable since this is our very largest hard drive (800M,
which was too large for 486s to handle). Is there some way to tell if the
boot manager is actually there? I do care about the data as it would take
a long time to transfer it to another computer and back again. I think we
reformatted the drive before starting, but may not have done fdisk /mbr to
it. We will do so on future drives. Thanks for the idea.
The recv 1000 "00" is in netdial.scr and I now have that under control. It
was actually dialing just fine but not loading the packet driver because I
had deleted the line 'epppd'. I put it back and it works. Apparently epppd
is used by Arachne with miniterm as dialer, by Lynx with chat.exe as dialer,
and by Bobcat with netdial as dialer. What is going wrong with lynx is not
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gull
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response 196 of 205:
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Jun 18 12:35 UTC 2002 |
Most, but not all, boot managers give a message during boot. Some prompt
you to press ENTER if you want to boot from a floppy or something like that.
The only way to be sure is to look at the master boot record with a sector
editor, though.
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keesan
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response 197 of 205:
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Jun 18 14:41 UTC 2002 |
We tried some boot managers that let you boot from different operating systems
(DOS or Win95) and they had a menu. I don't have a sector editor. We used
fdisk /mbr once to remove a virus detection program from a hard drive.
Jim insists that you can do fdisk /mbr without losing any data. So far I have
stopped him from doing it. Please explain why this is bad.
Gull, how do I print one page with Ghostscript? I want jumper settings for
a motherboard without the other 76 pages of AMI BIOS instructions, etc.
I tried converting to text but it scrambles the tables. Is the line
with Epson and %d in it to be typed as is, or do you substitute something for
the d? (I will copy it out if that will help, later).
We just learned that the S3 graphics drivers supplied for WP51/DOS work with
the Trio 64 (Diamond Stealth) card but crash the Virge (4M, later) card. A
VESA driver works with both and looks better.
How do we know whether, for a 150MHz cpu, to set the motherboard to 1.5 x 100
or 2 x 75? Some of the cpus are labelled 66MHz, for instance, but some are
not labelled. It seems to run better with a higher base clock speed but not
all motherboards have 75MHz (of our DFI, one does, one does not and has only
60 or 66 MHz possible). Do we pick the speed to match the motherboard, or
the cpu, or try to match both? We could set an ATT board to 1.5x66 or to 2x50
to get 100, with an Intel 100MHz cpu, but the 66 setting ran a bit faster.
Can we set to the clock speed of the cpu (assuming the board handles it) and
also less than that speed. (66 or 50, in this case). But not to 75 if the
cpu is 66? We have a cpu (unknown status) and a motherboard (also unknown)
which reads the 166MHz cpu as a 486 SLC and I want to test the cpu in another
computer (known good motherboard, set at 2x66MHz right now). The cpu is not
marked as to clock speed. Cyrix 6x86 cpu (or IBM 150MHz 6x86 is another).
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gull
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response 198 of 205:
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Jun 18 16:43 UTC 2002 |
Re #197: I apologize, I used 'boot manager' when I meant to use 'disk
manager' earlier.
Normally, fdisk /mbr doesn't cause any data loss. However, if you have
disk manager software installed, the data on the disk is probably in a
proprietary format that only can be read properly with the disk manager
loaded. If you overwrite the disk manager with fdisk /mbr the file
structure tends to come out garbled or completely inaccessable
afterwards, in my experience.
I think the %d is typed as-is. Ghostscript then replaces the %d with
the page number to make a new filename for each page, when it splits the
file up into pages. I've never used that particular feature, though.
I'm not aware of any way to get ghostscript to only print particular
pages from a document without doing the whole thing. I know Acrobat
Reader can do it, but you'd need Windows for that I suppose.
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keesan
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response 199 of 205:
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Jun 18 21:11 UTC 2002 |
Ghostscript was supposed to generate a separate file for each page (77 files?)
which you could then print. If I cannot figure this out, I will convert to
a postscript file and view with PSVIEW which I can enlarge and scroll with.
I wish manuals were in text instead of pdf, or at least in both.
I will let JIm know about fdisk /mbr - so we were both right, I guess.
We got four modems checked out. One 2400, one no-dial-tone 14.4, one working
33K (finally got the jumpers right) which says it is a 56K but connects at
31200 (is it our phone line, or are there jumpers which might change the
speed) and one with 14 mostly unlabelled jumpers which we can set IRQ on, or
use to disable the computer, but 4 mystery jumpers left that might set base
IRQ. Jim got it to work as Com1 but my software is all set to Com2.
I can now dial with three different PPP - type dialers and then use dosppp
(epppd) to load the packet driver.
Miniterm from Arachne - on my 28.8 and 33K modem it works about half of the
time, on the '56' possibly all the time.
Netdial from Bobcat - works nearly all the time on the 28.8 and 33K, but not
at all on the '56K'.
Chat from Lynx - works about a third of the time on the two slower modems and
not at all on the faster one.
I think the defaults must have been set on these programs by people with
certain speed modems. So I am using Netdial on the slower ones and Miniterm
on the faster one and chat not at all unless I can figure out how to slow it
down (or speed it up?).
We have one motherboard, from JEP, which can go to 66 or 75 or 83MHz board
speed, with four voltages. Our motherboards from LK go to either 60 and 66MHz
or to also 75 MHz (the older boards can go faster). We replaced the PR-166
133MHz cpu with an IBM P200+ 150MHz cpu and changed voltage from 2.8 to 3.5.
A third cpu calling for 2.9V worked at 2.8V when tested. We used multiplier
2 times 66 or 75MHz. Next we will try 2x83. This JEP board had all the
jumpers described in a table on the board, which is helpful since we don't
have the manual. The DFI boards from LK all have online manuals but the
boards are not labelled. They are all very nice boards, all 1996 or 1997.
The ATT Pentium from TPRYAN only goes to 133MHz as it is 1994 and nobody had
invented faster cpus by then. Our 150MHz cpu is 1995. They are all Socket
7. Our Pentium 75 is Socket 5. What number sockets have been invented since
1997?
Leeron says the newer boards won't fit in the older cases any more, something
about the backs being different.
The DFI boards have places to plug in a USB port but we don't have the parts
that go in teh back of the case. You would need to download USB drivers and
install them. This may be why people are getting rid of their 233MHz
computers as it sounds rather complicated to update them. There are also
downloadable flash BIOS upgrades that you need to run USB or wireless stuff
- besides keyboards, what is available wireless? Why does someone want a
wireless keyboard? I have trouble reading the screen from far away.
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