A little update 2023-08-24: Changed the oscillator to 60Mhz (= 286@30MHz). After a min or two it hangs. It seems the memory it at fault. 1WS solves this. But negates any speed advantages as it acts slower then 25MHz with 0WS. Does anyone have faster SIMMs - like 45 or 50ns? Photos: https://i.imgur. …

Half-Saint wrote on 2014-02-19, 07:29: stbunny wrote: Wolfenstein 3D, which runs smooth enough on Harris 20MHz + 1Mb RAM + Trident 9000c ISA. I have the same system and if I compare it to a 386DX-40, Wolf3d runs like crap on a 286. Wolf3D runs perfect on my 0ws 286-16!

Hi, i wanted to share this little story of a 386 motherboard (and me). Hi McBierle, Could you please post some pictures of the 32-bit memory expansion card that came with your C386 mainboard? I would appreciate this very much as I got one of these mainboard from a friend.. Mine is a C386-25 and it …

Dusting off this topic :-) That's a very nice rebuild indeed, McBierle! A friend of mine gave me an old big tower with a similar but slightly older C386 mainboard. This one is the 25Mhz flavour ;-) Mine is also completely destroyed by the evil Varta and there are a few parts missing like the CPU, …

Thanks!

Necromancing this old topic, which I find very interesting as a PS/2 / IBM afficianado ;-) My Model 30 286 was very unstable as well when clocked at 12MHz and it took me some time to figure this out but mine runs super stable now at 12MHz with 80ns memory after I completely disabled the parity …

Sorry for necroing this thread but where's the second file? Isn't it supposes to be 2 32k files for the two ROMS? 😉

I saw Jo22 mention composite CGA. I can do you one better: Did you guys know that MCGA on a Model 30 can actually natively output a 15KHz RGBS signal through its DB-15 connector? If you jumper the monitor sense lines 0 and 1 to ground the video subsystem will switch to and undocumented "reserved" …