No. That motherboard contains a 169-pin Socket 1 whereas the Pentium 83MHz OverDrive requires a 237-pin Socket 3.

At best you could install an Am5x86-133MHz CPU from the likes of Kingston or Evergreen Technologies. The Am5x86 performs about as fast as a Pentium 75MHz in integer/ALU speed, but is much slower in FPU speed.

5V only board, so an Am5x86 would have to be the Kingston/Evergreen carrier upgrade, might be possible to use the Scrap Computing 3V interposer for a regular CPU

Folks have made a pod work in socket 1 by elevating the cpu using a set of socket 1 sockets inserted in the board to elevate the pins above the components around the socket.

Even when you do this the cache, bios and other incompatibilities may surface

It does work in socket 1. The extra pins are extra VCC & GND.

Another option is a DX4-100 ODP/R. The ODP is 169 pin, the ODPR is 168 pin. At 120Mhz they are similar to a Am5x86 in floating point, and similar to a POD83 in integer.

Hallo egbertjan,

I have this board, and it has the Ver 1.143K BIOS as well. I’m running an i486SX-25 on this 4386-VIO board and this works fine, so I never had the need to update the BIOS.
But you made me curious, and I will try the latest Ver 2.06K BIOS to see what is changed.

Using my hexeditor to look at the CPU support in the 2.06k BIOS, I see support for these CPUS:
80386DX, 80386SX, 80386SL, 80486SX, 80487SX, 80486DX, 80486DX2, Cx486SLC, Cx486DLC, Cx486S, Cx486S2, IBM386SLC, IBM486SLC2, and P24T (POD63/83).

A typical list for a 386/486 board from that era, but the P24T support is a nice surprise. The 1.143k BIOS didn’t have that.
With the 1.143k BIOS I did try a Cx486DX-40 once, but this didn’t work and looking at the above list, it won’t work with the 2.06k BIOS either.
Using an interposer for 3.3V, a DX4 will probably work fine, but the BIOS sees it as an 80486DX2-100.

I will report back when I have tried the 2.06k BIOS.

Groetjes, Jan

I’ve installed the Ver 2.06k BIOS on my FIC 4386-VIO and it works great!
Because the previous Ver 1.143k uses the v4.20 Award BIOS core, and the Ver 2.06k the v4.50 core, there are some nice improvements.

The initial POST screen still displays the same list of tests, but you can now simply hit the Del key, instead of Ctrl-Alt-Esc, to enter the CMOS Setup.

The 1.143k BIOS has only 2 Setup screens with a limited amount of options.

The 2.06k BIOS shows the more familiar Award BIOS CMOS Setup with a lot more menus and options. You even get an IDE HDD AUTO DETECTION menu, saving you the hassle of entering the drive’s CHS values manually. 😀

And the 2.06k BIOS has a System Configurations summary screen that the 1.143k BIOS lacks.

Unfortunately, being a 1993 BIOS, the Ver 2.06k still has the 504MB IDE HDD limit, just like the 1.143k BIOS had. So for larger drives, you need a solution like XTIDE Universal BIOS or Drive Overlay software.

Cheers, Jan

Thank you Jan, I am very happy about what you wrote about the BIOS Ver 2.06k. I would like to upgrade the BIOS on my board, but the BIOS-chip on my board is not programmable. Do you know which chip I can use? When I have the right chip I can program it with my T48. By the way, do you know the jumpersettings and which crystal oscillator I have to use when I apply the P24T? Greetz, Egbert Jan.