kixs wrote on 2023-07-08, 19:21:

Since I was replacing a blown up Tantalum cap on one wavetable card today and had some free time, I took the chance to do the o […]
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Since I was replacing a blown up Tantalum cap on one wavetable card today and had some free time, I took the chance to do the oscillator removal on one 286 board and replacing it with a socket - this was in the plans for many years 🤣

Originally running at 20MHz with soldered Harris 80286-20, I tested it up to 27MHz. Screenshot at 25Mhz as a teaser. Will do another thread for "Kixs's 286 to the Max Too" soon 😁

what chipset?

kixs wrote on 2023-07-08, 06:49:

iPonRMA wrote on 2023-07-05, 19:11:

I know its an old thread, but i just built my first version of "FAST 286" project a few weeks ago. Still at 25MHz...

Nice build 😀

But some specs with more photos would be nice 😁

Thanks. The motherboard has a "PC-CHIPS3" chipset (or something with this sticker on it), 25MHz Harris CPU, Cyrix 287XL+ FPU, 4MB SIMM RAM, Tseng ET4000W32i videocard, 1.2MB & 1.44MB FDD, Seagate 520MB HDD, Creative Sound Blaster Pro2.
Here is a video with some benchmarks and games:

https://www.youtube.com/watch?v=c2TBeuVWuQA

I will try other mobos soon with FSB increasing.

maxtherabbit wrote on 2023-07-09, 01:04:

kixs wrote on 2023-07-08, 19:21:

Since I was replacing a blown up Tantalum cap on one wavetable card today and had some free time, I took the chance to do the o […]
Show full quote

Since I was replacing a blown up Tantalum cap on one wavetable card today and had some free time, I took the chance to do the oscillator removal on one 286 board and replacing it with a socket - this was in the plans for many years 🤣

Originally running at 20MHz with soldered Harris 80286-20, I tested it up to 27MHz. Screenshot at 25Mhz as a teaser. Will do another thread for "Kixs's 286 to the Max Too" soon 😁

what chipset?

More info here:
Kixs's 286 to the Max Too

The Bench_XT package is excellent, and I managed to test Wolf3D on Madness machine.
R3800X @4GHz def, 2C/2T/NV7900GS/SB0060/sound on/SBEmu/FVid LFB/WC on :

Machine in SpeedSys :

Just wanted to add some interesting stats from a 386sx 25MHz board I've been testing.

Chipset: Chips & Tech F82C836 B-25
CPU: Intel 386sx-20 at 25MHz
RAM: 8MB 60ns, 8 SIMMs
VGA: Trident 8900D-R, 0WS, 1996 dated Siemens FP RAM

ISA Bus 10MHz:
3DBench: 8.2
Landmark VGA: 4777

ISA Bus 12.5MHz:
3DBench: 8.4
Landmark VGA: 5957

Landmark VGA score for a CL-GD5429 (1WS) at ISA Bus 12.5MHz was ~4770, the same as the Trident (0WS) at 10Mhz.

MikeSG wrote on 2024-04-19, 10:32:

Also tested a CL-GD5429 (1WS). Landmark VGA score was ~4770 at 12.5Mhz, the same as the 0WS Trident at 10Mhz.

Your Trident is -R variant, which apparently means reduced (in terms of complexity) for cost optimization. Not sure how it compares to non-R 8900D but I do know you need 1MiB of VRAM on 8900D to get to to full 32-bit internal bus speed. 0WS setting is important too but it's that 32-bit internal bus that mostly sets apart 8900D and other, slower cards.

This is the card. There are less components, however BIOS/screen overlay says 1MB on boot.

RAM is two "256k x 16bit". 16ms refresh cycle. 2x longer than 1991 DRAM (mb81c4256a-70p).
https://html.alldatasheet.com/html-pdf/45237/ … 14171BJ-50.html

8900D's are also 48MHz.

A list of 0-wait state video cards ranked by performance would be interesting.. obviously the Tseng W32i is at the top.

Eg. Landmark Video (chr/ms):
Tseng ET4000 W32i: 8057 (bus MHz?)
Trident 8900D-R: 5957 (12.5Mhz)
Cirrus Logic 5420...

My 386dx-20 with 8 megs at 70ns with 0 wait states got 16,6 with sysinfo 6. but got 9,9 with wait state 1, its a big difference

didnt benchmark, but doom looks horrible, its slow like a sx-16 to my eye. i dont remember if it was at wait state 0 or 1. i try interleave but in games its freeze, i dont know the reason.

I think soon i will connect everything, and benchmark my 386 sx 16 VS my 386 dx 16 no cache but the dx 16 have option for wait state and interleave. Are people interested at this comparison ? i believe the score between them will be very similar