VOGONS


Reply 17500 of 23311, by Shagittarius

User metadata
Rank Oldbie
Rank
Oldbie
Caluser2000 wrote on 2020-12-11, 22:14:
Shagittarius wrote on 2020-12-11, 21:56:
Caluser2000 wrote on 2020-12-11, 21:29:

Sorry. Some systems were designed to use EDO ram only. There isn't really that much of a performance difference between the two.

It's weird my manual suggests that when running at 66Mhz FSB it should use EDO instead of FPM, but then it says you can still use FPM in 66MHz mode, I was thinking that maybe there might be a performance penalty there...

If I remember rightly at the same clock speed FPM is a tad faster.

I will run some benchmarks, and memory specific tests before I do that swap, not to doubt you, just so I have non subjective personal results when I make the swap. I'll let you know how it goes.

Reply 17501 of 23311, by Caluser2000

User metadata
Rank l33t
Rank
l33t
Shagittarius wrote on 2020-12-11, 22:19:
Caluser2000 wrote on 2020-12-11, 22:14:
Shagittarius wrote on 2020-12-11, 21:56:

It's weird my manual suggests that when running at 66Mhz FSB it should use EDO instead of FPM, but then it says you can still use FPM in 66MHz mode, I was thinking that maybe there might be a performance penalty there...

If I remember rightly at the same clock speed FPM is a tad faster.

I will run some benchmarks, and memory specific tests before I do that swap, not to doubt you, just so I have non subjective personal results when I make the swap. I'll let you know how it goes.

Cool. I look forward to te results.

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 17502 of 23311, by aha2940

User metadata
Rank Member
Rank
Member

Went through a couple more missions of Dark Forces. I'm on mission 13 now. So far, this game has become a favorite of mine, it's even better than Doom, having story, cutscenes, varied missions and objectives and, for the first time in history: storm-troopers that can actually hit a target!

Reply 17503 of 23311, by Thermalwrong

User metadata
Rank Oldbie
Rank
Oldbie

I've been having fun today with getting my Soundblaster 2.0 knock-off to have CMS sound. It works with the same CMS GAL as described here, pinouts are all the same 😀

The first GAL16v8 I bought was a used one, which was a mistake because pin 3 on that chip didn't work, which lead to patchy / single channel CMS audio. The fresh GAL16v8D came in a couple of days ago, .jed file made and flashed onto the GAL.
After that, just remove the CMS jumper, install the chips and it works. I've only tried it in KQ1 so far, but it sounded good with really nice stereo effects.

With that, I had a good reason to test out this PCA-6134P SBC I bought last week. A cacheless AM386 SX-40 made in around '96 that takes 72-pin SIMMs for memory. It even has LBA support in the BIOS 😀 To start with when I plugged it in, it seemed to be cutting out, that that was just because I'd set the bench PSU current too low and it was detecting a brown-out and shutting down. The CMOS battery on the dallas chip block is dead but the board appears to be working otherwise.

This little PC has it all, motherboard, CPU, DC-DC PSU, IDE, floppy, parallel/serial then graphics and soundcard in this fairly tiny space of 190 x 150 x 80 mm

Attachments

Reply 17504 of 23311, by Grzyb

User metadata
Rank Oldbie
Rank
Oldbie
Thermalwrong wrote on 2020-12-12, 00:49:

I've been having fun today with getting my Soundblaster 2.0 knock-off to have CMS sound. It works with the same CMS GAL as described here, pinouts are all the same 😀

Looks like this card - Re: Help with Drivers for an 8-bit SB 2.0 clone?
I think I have such a card, too, together with a manual which says that CMS is not supported, so I never bothered to try...
but if it works for you, I'm going to install those chips anyway!

Reply 17506 of 23311, by Thermalwrong

User metadata
Rank Oldbie
Rank
Oldbie
Grzyb wrote on 2020-12-12, 05:16:
Looks like this card - Re: Help with Drivers for an 8-bit SB 2.0 clone? I think I have such a card, too, together with a manual […]
Show full quote
Thermalwrong wrote on 2020-12-12, 00:49:

I've been having fun today with getting my Soundblaster 2.0 knock-off to have CMS sound. It works with the same CMS GAL as described here, pinouts are all the same 😀

Looks like this card - Re: Help with Drivers for an 8-bit SB 2.0 clone?
I think I have such a card, too, together with a manual which says that CMS is not supported, so I never bothered to try...
but if it works for you, I'm going to install those chips anyway!

Yeah it's that exact card 😀
The manual that I found makes mention of the Optional C/MS Wafers, and the wiring did match up with what's defined here in scorp's video. The MSI006 seems to be quite close in function to the SB 2.0's CT1336a.
Here's the .jed file that I used and is working on mine if you'd like to try it out.

Attachments

Reply 17507 of 23311, by Caluser2000

User metadata
Rank l33t
Rank
l33t

Cleaned up the dot matrix printer and Amiga A600s plastics. The Amiga was very yellowed.

Attachments

  • DSC_0000222.jpg
    Filename
    DSC_0000222.jpg
    File size
    193.07 KiB
    Views
    497 views
    File license
    Fair use/fair dealing exception

There's a glitch in the matrix.
A founding member of the 286 appreciation society.
Apparently 32-bit is dead and nobody likes P4s.
Of course, as always, I'm open to correction...😉

Reply 17508 of 23311, by SVD

User metadata
Rank Member
Rank
Member

Ahhhghh
So thats why it wont start...

Edit: If anyone have a picture of the area around/under the battery on a Opti-495slc board it would be very appreciated. some traces are gone.

Attachments

Reply 17509 of 23311, by douglar

User metadata
Rank Oldbie
Rank
Oldbie

Recapped my first motherboard today! Well, first successful recap. I practiced on a cadaver board first. Didn't work before or after.

This board (m7ncg 400) sort of worked before, which was amazing to me because all of the 3300uf caps had nearly lifted themselves off the motherboard within a day after powering it up for the first time in years. Didn't like being woken from it's long slumber, I guess.

Photo Dec 12, 2 47 59 PM.jpg
Filename
Photo Dec 12, 2 47 59 PM.jpg
File size
208.45 KiB
Views
462 views
File license
Public domain

There is a spot for a 5th 3300uf capacitor on the motherboard that was not occupied. I see that it would block the heat sink. Any chance the board would be more better with an extra capacitor or would I kill the patient?

Reply 17510 of 23311, by evasive

User metadata
Rank Oldbie
Rank
Oldbie
SVD wrote on 2020-12-12, 19:34:

Ahhhghh
So thats why it wont start...

Edit: If anyone have a picture of the area around/under the battery on a Opti-495slc board it would be very appreciated. some traces are gone.

UH19 now has 10 different identified OPTi 495SLC boards to choose from. More info would be welcome I think.
https://www.ultimateretro.net/en/motherboards/?chipsetId=375

Last edited by evasive on 2021-11-28, 14:13. Edited 1 time in total.

Reply 17511 of 23311, by SVD

User metadata
Rank Member
Rank
Member
evasive wrote on 2020-12-12, 20:09:
SVD wrote on 2020-12-12, 19:34:

Ahhhghh
So thats why it wont start...

Edit: If anyone have a picture of the area around/under the battery on a Opti-495slc board it would be very appreciated. some traces are gone.

UH19 now has 10 different identified OPTi 495SLC boards to choose from. More info would be welcome I think.
http://www.win3x.org/uh19/motherboard/result/?chipsetId=375

Ahh thanks, it is this http://www.win3x.org/uh19/motherboard/show/1487

Reply 17512 of 23311, by Ozzuneoj

User metadata
Rank Oldbie
Rank
Oldbie

I just cleaned up a couple of mechanical keyboards I've had laying around since spring. One is a Vendex XT-compatible in beautiful condition (with, I believe Hi-Tek switches) and the other is a Focus FK-2001 which seems to have some kind of white Alps switches.

Also had to fix a broken case tab on the Focus (it was shipped to me without sufficient packaging), which took some creativity involving a piece of metal harvested from an old floppy disk slider.

Can't wait to put them to use. 😀

Now for some blitting from the back buffer.

Reply 17513 of 23311, by UltimateElectronic

User metadata
Rank Newbie
Rank
Newbie
Ozzuneoj wrote on 2020-12-12, 21:09:

I just cleaned up a couple of mechanical keyboards I've had laying around since spring. One is a Vendex XT-compatible in beautiful condition (with, I believe Hi-Tek switches) and the other is a Focus FK-2001 which seems to have some kind of white Alps switches.

Also had to fix a broken case tab on the Focus (it was shipped to me without sufficient packaging), which took some creativity involving a piece of metal harvested from an old floppy disk slider.

Can't wait to put them to use. 😀

Interesting, I used to have one of those FK-2001 keyboards, but it was rebranded as "Microbits". I think they might have been an Australian company.

Reply 17514 of 23311, by Dmetsys

User metadata
Rank Newbie
Rank
Newbie

Did some investigation work on the dead M577 / Amptron PM-9900A. Turns it has broken traces all over the place, especially in the FSB jumper area. Who ever had this board didn't treat it that well. Well, now it becomes wall art. 😜

BE6-II 1.0 | PIII-500 | 320MB | GeForce 2 MX400
P5A-B | K6-2 300 (100x3) | 256MB | GeForce 2 MX
ECS UM4980 | 5x86-P75 | 32MB | 90C33-ZZ (In progress..)
Toshiba Satellite Pro T2155CDS | Compaq Contura 400C
Macintosh Plus

Reply 17515 of 23311, by Horun

User metadata
Rank l33t
Rank
l33t

I worked on a Amptron PM9100A over the last few days, was dead and now it works. Had broken+shorting SIMM socket plus some other minor stuff.
Only thing left to do is flash the BIOS to newest version and find proper Serial/LPT back plate.
Did find a Video back plate that works with the onboard header so do not need to use a PCI card but probably will when/if I build a system out of it.

Attachments

  • Img_1451s.jpg
    Filename
    Img_1451s.jpg
    File size
    319.29 KiB
    Views
    332 views
    File license
    Public domain
  • Img_1453s.jpg
    Filename
    Img_1453s.jpg
    File size
    150.79 KiB
    Views
    332 views
    File license
    Public domain
  • Img_1449s.jpg
    Filename
    Img_1449s.jpg
    File size
    238.35 KiB
    Views
    332 views
    File license
    Public domain

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor.

Reply 17516 of 23311, by bjwil1991

User metadata
Rank l33t
Rank
l33t

Swapped the power boards between the AMS and Austin laptops as the one in the Austin shorted and caused the laptop to turn on when plugged in. My initial plans are to remove the battery terminals and reflow solder on the one IC that has a bit of corrosion on it.

Discord: https://discord.gg/U5dJw7x
Systems from the Compaq Portable 1 to Ryzen 5 2600X
Twitch: https://twitch.tv/retropcuser