First post, by ruthan
- Rank
- Oldbie
Hello,
i got this board, i never was in 386 stuff building, so i was sort of suprised that in this era board identification and manuals weren't that easy and brands did not advertised their brand, not even through some OEM data and maybe even manuals for boards werent sure thing.
I not have cpu and mem to run it right now, i far i found that i would need intel DX - 25 or 33 and at least 4 small simms - i found 1.
Found labels:
1) 386XO cache
Copyright 1990
85-04-0081
2) on the edge J12 - 2-3 for Rev .B & 64k cache
3) Backside 6022-1 small number, under is 9023 16 bigger numberm vertically there is this label - WTF -900303-02 ; WTF is nice..
4) On the bottom ISA slot is SP 002336 QA IJ and some red Asian symbol in Circle stamp and 79.8.24
Chipsets are managed by these 2 chips:
Opti 82C381+82C382 - what supposed to be chips for 25 or 33 MHz DX, on both is printed 25 MHz, im not sure if it does means that is limited 25 Mhz version of Intel 386DX or 33 MHz is possible and number is for cpu bus speed.
This chipset should support dividers 2/3/4.. so 4*8Mhz = 33 MHz should be possible.
Cache chips are these:
IS61C66-L15N - 15ns SRAM (extremely fast!), its good enough for 40 MHz.. its up to 66 MHz ; Ultra-fast 8K x 8 SRAM
M81C70A-35P - 35ns SRAM (also quite fast), its good enough for 40 MHz ; Fast 1K x 8 SRAM (possibly tag RAM)
Controller:
Chips p82c206 h 6058-j Japan, 9006 EAME
There is big ~132 long long under ram slots, probably some other cache.
Jumpers with labels are:
J14 - reset, J15 - Turbo; J 16 - Speaker, J17- Keylock.; JP 13 - could be monochrome / color jumper i found the same for similar board.
I looked here:
https://www.vogonswiki.com/index.php/386_Motherboards
https://th99.infania.net/m/m386_5.htm
for Opti MBs, found picture on all them on Retro web, but no match. Closest is novacor,-inc.-optimum:
https://theretroweb.com/motherboards/s/novaco … um-386-25-33-40 // But it has 40 MHz CPU support and all ISA slots are long, i have 3 short on my board.
I mainly need some info about Jumpers / pin headers J1 to J13 + J18, there are not labels..
Im old goal oriented goatman, i care about facts and freedom, not about egos+prejudices. Hoarding=sickness. If you want respect, gain it by your behavior. I hate stupid SW limits, SW=virtual world, everything should be possible if you have enough raw HW.
