Re: serial mouse not detected on a 386 motherboard
Posted on 2023-06-16, 05:00
Looking at this diagram and not sure what i need to “construct” actually. Probably missing the obvious. Can you clarify please ?
Re: serial mouse not detected on a 386 motherboard
Posted on 2023-06-16, 03:09
Should clarify - i use CTMOUSE (whatever was the latest version) and MS MOUSE version 9.01. They can be initialized from command prompt. Really puzzling what kind of hardware issue that can be. Will finish some lookups with the multimeter and oscilloscope later today. But feels unlikely something …
Re: serial mouse not detected on a 386 motherboard
Posted on 2023-06-15, 23:18
edited the original post. both com1 and com3 are enabled. tried all possible combinations of controller jumpers and driver parameters to attach to any possible addres/irq. at the same time everything else works just fine.
Re: 3 (+3 more) retro battle stations
Posted on 2023-06-15, 22:16
Realized that not all crystal oscillators work on all 386 motherboards. This is especially true for those 100/110/120 MHz oscillators. So, i had to go back and recheck all boards that could overclock to 50 or more MHz FSB. Luckily they are not that many and only 2 of them had to be retested. As a …
Re: serial mouse not detected on a 386 motherboard
Posted on 2023-06-15, 20:58
yes, i think. going now through the pins with multimeter ...
serial mouse not detected on a 386 motherboard
Posted on 2023-06-15, 20:08
A bit perplexed by this issue. Controller and mouse working well with other motherboards. Multi I/O controller is properly configured. Disabled LPT and COM2. Only COM1 enabled. Edit: and COM3 enabled. POST reports E803 address. MSD.EXE reports IRQ4 for COM1 and COM3. No conflicts. DEBUG.EXE -d 40:0 …
Re: 486 board with UMC 8881E/8886B: The winner is: EDO without L2 (terms and conditions apply)
Posted on 2023-06-10, 02:07
Agreed with the relevant comments above. DEVSEL# DECODING I brought it for completeness. It has no performance impact as far as i can tell. If set to FAST - POST does not complete past 33MHz FSB. That's all.
Re: 486 board with UMC 8881E/8886B: The winner is: EDO without L2 (terms and conditions apply)
Posted on 2023-06-09, 02:30
To mkarcher's note about not limiting RAM. Present L2 cache with 2-1-1-1 timings is always faster than L2 cache disabled. FPM can cope with this at up to 4x40MHz, or 3x50MHz. After that 50ns EDO modules are needed. For reference, UUD motherboard, Am5x86, 3x60MHz, L2 cache 2-1-1-1, 64Mb EDO 1/0WS, …
Re: 3 (+3 more) retro battle stations
Posted on 2023-06-03, 18:40
Until now this post outlined the highest performance watermark for 386 class hardware, but nothing lasts forever. MSI MS-3124 version 2.1 based on Contaq 82C591 A, 82C592 The fastest 386 motherboard ... to date. https://www.petershipkov.com/temp/retro_pc_images/components_lo/motherboard_386_msi-3124 …
Re: local storage devices not recognized on a 386 motherboard
Posted on 2023-06-01, 21:33
Yes, reflowing is in order. Wanted to get some feedback before i start baking the PCB in case i am missing non-physically invasive options.
local storage devices not recognized on a 386 motherboard
Posted on 2023-06-01, 20:59
I have this 386 motherboard that is in pristine physical condition. Everything seems to be all right with it except that no local storage devices (HDDs, CF cards) get recognized. I am using trusted components that work just fine in all other cases. Tried few different BIOSes from working mobos with …
Re: 3 (+3 more) retro battle stations
Posted on 2023-05-30, 19:37
Doh. You are right. Sorry. So all good there. LW3D can easily be influenced by win98 vs 3.11/95 that i usually test 486 hardware.
Re: 3 (+3 more) retro battle stations
Posted on 2023-05-30, 16:37
Here is what i meant. In your last post you reported Quake 1 reaching 18 fps which indicates great overall system performance. But the 3DS and LW3D results are 150 and 1454 seconds. They should be around 110 and 1290. This is what i found contradicting.
Re: Soyo 4SA2 only goes up to 64MB memory (16MB per slot)
Posted on 2023-05-30, 01:12
@riplin Assuming you are talking about that Asus PVI rig: The two motherboards use the same chipset stepping, so it could be a BIOS issue you are facing. There are multiple BIOS versions of the Soyo board - it is a mess really. Not sure which one you are using, but you can use the Asus PVI BIOS as a …
Re: Soyo 4SA2 only goes up to 64MB memory (16MB per slot)
Posted on 2023-05-29, 04:38
I know. They kind of do.
Re: Soyo 4SA2 only goes up to 64MB memory (16MB per slot)
Posted on 2023-05-29, 04:30
Try these: Filename 20230528_212500.jpg File size 704.17 KiB Views 575 views 64Mb 60ns FPM. Overclock well. Work fine with the SiS chipset version on the Soyo board. (both sides look identical)
Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!
Posted on 2023-05-29, 02:26
I would simply remove it. No point to be there in the first place given the presence of PGA132 socket.
Re: 3 (+3 more) retro battle stations
Posted on 2023-05-29, 02:25
Nice. Some of the results seems to be contradicting each other. For example: 18 fps in Quake 1 suggests well optimized system, but the 3DS test suggests otherwise. Both of them lean heavily on the FPU. Wonder if a different VGA BIOS will help the DOS pixel pushing (Wolf3D, Doom) ? You probably saw …
Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!
Posted on 2023-05-29, 00:40
Wouldn't option B cause the CPU to still draw electric power ? Asking because recently was affected by less than ideal 5V rail issues. Do you know ?
Re: Supermicro SUPER 370DE6 REV 1.2/Dual PIII Coppermine Build
Posted on 2023-05-28, 04:00
Synthetic tests are mostly meaningless, but if 3DMark is inline with the expectations, then it can be a Q3 specific issue of some sort. Maybe test with few more games/apps and compare results with known measurements. Just thinking out loud here. Hope you figure it out. Things are shaping up pretty …
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