Re: Another Trident TGUI9440 memory upgrade
Posted on 2022-12-10, 21:00
Yes, I tried to reseat chips, still shows 512 kb
Another Trident TGUI9440 memory upgrade
Posted on 2022-12-10, 18:28
Hello, I have in possession this VLB videocard Trident TGUI9440. Filename unnamed.jpg File size 1.61 MiB Views 263 views It shows only 512K of memory on boot. Looks like it has 8 256kx4 memory modules installed, shouldn't it have 1Mb? Also, I want to install two memory upgrades in empty sockets, …
Re: Choosing 386 motherboard and CPU
Posted on 2022-11-16, 16:44
CY7C166 arrived today, installed it in M321 and WB seems to be working. QS8888 does not work. 1. Memory bandwidth with WB - 44.84 MB/s, without - 25.27 MB/s 2. Memory throughput with WB - 16.81 MB/s, without - 15.33 MB/s
Re: Choosing 386 motherboard and CPU
Posted on 2022-10-27, 08:19
There is a thread https://www.vogons.org/viewtopic.php?t=71168 about similar motherboard M321 but different revision (mine is 2.6), I expected to see similar behavior after installing WB cache in U32. It has reports of using DIP22 CY7C164 with success. In the second-to-last message we see SpeedSys …
Re: Choosing 386 motherboard and CPU
Posted on 2022-10-26, 18:08
Got some ISSI 15ns, installed them and got 256kb of cache. Nice! Had to solder JP3, it was missing from the motherboard. Also got two QS8888-15 (DIP22) and tried to install it in U32 slot. Slot is DIP24, but I saw somewhere here that you still can install DIP22 in it, aligning with pin 1. However, I …
Re: Choosing 386 motherboard and CPU
Posted on 2022-10-07, 13:38
Thanks! I will try first with 16k x 4. What should I buy? DIP 24 and 15 ns ones? Need some recommendations to start search.
Re: Choosing 386 motherboard and CPU
Posted on 2022-10-03, 14:01
I want to upgrade cache to maximum (now mb has 64 kbytes). Two small questions: 1. Is ISSI IS61C256AH-15N memory a good choice? 2. This motherboard has a slot for 16x4 chip (U32) which enables cache write-back. Which mode performs faster on 386s - write-back or default (is it write-through?)?
Re: Replacing oscillator
Posted on 2022-10-03, 12:40
majestyk wrote on 2022-10-02, 13:17: Do the settings of JP2, JP3, JP4 and JP5 have any impact on the CPU frequency? JP1 enables IDE controller JP2 and JP3 switches FDD A and B between 1.2/1.44 and must be set both Will check JP4 and JP5 and report back.
Re: Replacing oscillator
Posted on 2022-10-01, 12:11
chkcpu requires 386+ cpu, aida16 hangs on start, drhard also shows 12 Mhz. My idea was that 48Mhz is divided by 6 thus giving 8Mhz bus and CPU speed. By replacing to 60 we should get 10Mhz, not 12. How is that possible? Could it be that tests are somehow wrong?
Re: Replacing oscillator
Posted on 2022-09-30, 16:10
Ok thanks, will try these and report back.
Re: Replacing oscillator
Posted on 2022-09-30, 16:02
I have replaced oscillator to 60 Mhz one. Checkit shows me that CPU is 12 Mhz. What are reliable CPU test software of that era that can show real CPU speeds? My CPU is Intel D8086-1 (https://www.cpu-world.com/CPUs/8086/Intel-D8086-1.html) Shouldn't Checkit show real 10 Mhz speed?
Replacing oscillator
Posted on 2022-08-24, 17:03
Hello all! I have in posession Investronica M TUB-002 8086 motherboard ( https://theretroweb.com/motherboards/s/investronica-m-tub-002 ) which is 8 MHz one. It has two oscillators on board, one 14 Mhz, the other 48 Mhz. I think that 48 one is divided by 2, and then by 3, giving 8 Mhz bus speed. I …
Re: Dune 1 and MT-32
Posted on 2022-05-10, 17:56
1. Port 330, same port in dune.bat, "midi message" led on roland blinks once or twice on game start 2. Yes, card and unit work in other games
Dune 1 and MT-32
Posted on 2022-05-10, 16:20
Hi all! I'm trying to launch Cryo Dune 1 on 386 machine with MPU-401AT and "old" Roland MT-32 (rom version 1.07) - and getting no music. Should it even work on this setup? (tried to start game from the same folder in Dosbox+Munt - and music plays - so it's not software-related)
Re: Choosing 386 motherboard and CPU
Posted on 2022-05-06, 08:55
Replaced R38 and got power led working. Still wondering what was the purpose of other missing components.
Re: Choosing 386 motherboard and CPU
Posted on 2022-05-01, 18:14
Horun wrote on 2022-05-01, 17:09: R38 appears to go to pin 1 of J13 so yes is probably for power LED. From the pictures it is a 150 ohm (brown-green-brown), cannot read the Tantalum C47. Wattage of R38 should be 0,25 watt or more?
Re: Choosing 386 motherboard and CPU
Posted on 2022-05-01, 17:36
A bit larger picture of rev. 2.7 - http://www.amoretro.de/wp-content/uploads/pc- … motherboard.jpg C44, C45, R37, R50 are also missing...
Re: Choosing 386 motherboard and CPU
Posted on 2022-05-01, 16:36
I ended up bying M321 rev 2.6 motherboard ( https://stason.org/TULARC/pc/motherboards/I/ILON-USA-INC-386-M-321.html ) Strange thing, it had no keylock (+power led), turbo switch, turbo led, reset switch and speaker connectors (J10 to J14 on scheme), looks like they were pulled off (why?). I …
Choosing 486 motherboard
Posted on 2022-04-09, 18:14
Hello all! Trying to assemble a 486-era pc, can you give me some advice on what motherboard model should I choose? I want to use Intel A80486DX4-100 CPU VLB slots CR-2032 battery (were there such MBs?)
Re: Space Quest 3 "Divide overflow" on 286
Posted on 2022-04-09, 14:09
I replace my previous motherboard to M216 (https://stason.org/TULARC/pc/motherboards/I/I … 386-M-216A.html) and error gone away.
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