Re: Another PS/2 Mouse ISA8 card
Posted on 2019-07-31, 22:07
Still have interest. Sending PM!
Re: Dual Game port card with RTC clock
Posted on 2019-07-31, 01:30
I am curious, why would a game port card have an RTC on it? Also, if game ports are wired for two joysticks, why would there be any reason to produce a game port card with two ports?
Re: A tale of two Asus boards - socket 7 build dilemma
Posted on 2019-07-30, 20:06
Those boards likely have undocumented FSB jumper settings.
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-30, 07:50
I have ordered the TSOP adapters from China today and will order two of the Micron chips and two of the Intel BV chips from utsource. So it will probably be a few weeks before I can provide an update. I'm gambling that the BIOS is the only issue at play.
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-29, 22:09
WP# pin has replaced a DU (Don’t Use) pin. Connect the WP# pin to control signal or to VCC or GND (in this case, a logic-level signal can be placed on DU pin). Refer to Tables 2 and 9 to see how the WP# pin works OK, so for this motherboard, WP# is redundant and unused. Unfortunately, I don't see …
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-29, 09:13
My programmer does have an option for the 2 Mbit Intel P28F020 EEPROM. Aside from NC's, the difference in pinouts between E28F002BC and P28F020 is that the E28F002 has an RP# input pin, while the P28F020 does not. The manual lists RP# as, RESET/DEEP POWER-DOWN: Provides three-state control. Puts the …
Re: The Ultimate 486 Benchmark Comparison
Posted on 2019-07-29, 08:23
No, sorry, I haven't tested the Cyrix DX2-80. I would suspect that a properly setup 486 with a 40 MHz FSB (that is cache, RAM, and ISA/PCI bus timings are optimised) should yield a Cyrix DX2-80 as fast or a tad faster than an Intel DX2-66-WT.
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-28, 20:15
I don't think I have another board that is compatible with this EEPROM and my current programmer also doesn't support the P28F002. How then to use the Wellon VP-390 to program a P28F002 or E28F002?
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-28, 11:07
I removed the EEPROM. I ultimately didn't use any wick or QuickChip, but just used the solder as if it was QuickChip. Demo video from someone else here: https://www.youtube.com/watch?v=nZGEtpECPQY Now when I measure 5V to GND on the motherboard, I get 1.42 K-ohms. This supports the hypothesis that …
Experience with Maxthon browser for XP
Posted on 2019-07-28, 10:38
Has anyone tried the Maxthon browser for XP? According to Wiki, it comes out of China. https://en.wikipedia.org/wiki/Maxthon The latest stable release from 2 months ago ((5.2.7.3) seems to work OK on my XP Pro SP3 machine. I'm using the portable version (no installer). Any privacy concerns with this …
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-28, 08:55
Alright. Let me feel around with some other components as well. I'll see if solder braid can remove the EEPROM, then I'll recheck the 5V-to-GND resistance. I think I also have some of that Quick Chip stuff from the 90's that I never used. Think it is necessary to salvage the EEPROM, or is solder …
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-28, 06:19
Might be more effort than its worth for such a common board. Wouldn't call any PPro boards common this days. Splitting hairs here - the VS440FX seems fairly common for a PPRO board. A while back I accidentally shorted an ISA slot of a PCChips M571 with a multimeter probe while checking voltages. …
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-27, 21:33
This is odd. I have a Wellon VP-390 and I'm looking through the programming software and for TSOP, I only se TSOP-28 and TSOP-48's listed in the programming list, although on the Wellon website, I do see DIP to TSOP-40 adapter, http://www.weilei.com/TSOP40E.htm I'm guessing this pin format was …
Re: HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating
Posted on 2019-07-27, 21:13
Finding a TSOP-40 EEPROM 2 Mbit flash chip that works with my programmer will be the challenge. The database on the Wellon program isn't always a complete listing of offerings. I'll also need to order the DIP-TSOP-40 adapter. Might be more effort than its worth for such a common board. Wish they had …
HELP! - Dead Intel VS440FX motherboard with BIOS EEPROM overheating - SOLVED
Posted on 2019-07-27, 12:05
I have an Intel VS440FX motherboard that I cannot get to power up properly. The CPU fan spins fine, but the monitor stays blank. All three lights on the keyboard blink twice, which is usually occurs during a normal boot procedure. The power LED, which is connected to PWR LED on the motherboard, just …
Intel VS440FX with 128 MB or 3.3 V SIMMs
Posted on 2019-07-26, 19:11
Has anyone tried 128 MB SIMMs in an Intel VS440FX motherboard? What about 3.3 V SIMMs? The manually specifically calls for up to 64 MB SIMMs, but was wondering if 128 MB would work. Also, the manual does not specifically mention 3.3 V SIMMs, so I assume it is 5 V only? Seems some Pentium Pro boards …
Re: mb-8500ttd manual needed
Posted on 2019-07-26, 18:40
I have attached the Jan Steunebrink BIOS patch for Cyrix 4x, AMD K6-2, AMD K6-2+, AMD K6-III, AMD K6-III+, and 128 GB HDD support and all BIOSes I have for this board. See BIOS.txt in the zip file. When using Jan's BIOS, I recall that one or both of system/video BIOS cacheable had to be disabled. I …
Acer V20 486 PCI/VLB motherboard
Posted on 2019-07-25, 12:27
Does anyone have any experience with an Acer V20 486 motherboard? It came in a case I bought, which I plan to use for a socket 4 system (either an Acer V12 or Intel Batman's Revenge board). The V20 came cacheless. It appears to support both VLB and PCI and is based on a chipset I haven't see before, …
Re: Chinese 10ns SRAM for L2 cache
Posted on 2019-07-24, 05:29
You need to test them in an sram tester. Many eeprom programmers have an sram test function.
Re: Lowest CPU to play MP3s?
Posted on 2019-07-22, 21:45
I also noticed when I was doing benchmarking years ago that having USB card installed reduced the benchmark results. It is noted in a thread somewhere. Enabling slow refresh is the optimal setting, but probably won't help your situation much. You need to disable the spectrum analyser and scrolling …
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