VOGONS


Reply 80 of 86, by maxtherabbit

User metadata
Rank l33t
Rank
l33t
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 😁

Ur4t8GHl.jpg

what chipset?

Reply 81 of 86, by iPonRMA

User metadata
Rank Newbie
Rank
Newbie
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.

Reply 82 of 86, by kixs

User metadata
Rank l33t
Rank
l33t
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 😁

Ur4t8GHl.jpg

what chipset?

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

Requests are also possible... /msg kixs

Reply 83 of 86, by DarthSun

User metadata
Rank Member
Rank
Member

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 :

WOLF_201.jpg
Filename
WOLF_201.jpg
File size
67.46 KiB
Views
271 views
File license
Fair use/fair dealing exception

Machine in SpeedSys :

SSTIMG02.jpg
Filename
SSTIMG02.jpg
File size
139.05 KiB
Views
271 views
File license
Fair use/fair dealing exception

The 3 body problems cannot be solved, neither for future quantum computers, even for the remainder of the universe. The Proton 2D is circling a planet and stepping back to the quantum size in 11 dimensions.

Reply 84 of 86, by MikeSG

User metadata
Rank Member
Rank
Member

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

The F82C836 was an "A", but the "B-25" models are available to buy new so I soldered the B-25 on. No performance difference but may be able to clock higher.

The F82C836 is a 0WS 25MHz-max chipset with hidden refresh.

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

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

Linear 1.25x increase for Landmark, but only 1.02x increase for 3dBench.

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

CacheChk RAM speed was 11.1MB/s.

Reply 85 of 86, by Deunan

User metadata
Rank Oldbie
Rank
Oldbie
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.

Reply 86 of 86, by MikeSG

User metadata
Rank Member
Rank
Member

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...

Attachments