creepingnet
New member
The one on my FIC 486-PVT has this that broke the other day, it's used to switch between RN16-RN19 which selects the CPU type. Was just upgrading from an intel 80486 DX2-66 to an AMD 80486 DX4-100 100SV8B. May be trying some other chips as well at this point. I also would not mind getting my hands on another FIC 486-PVT as well to use as a spare/backup as I'm not 100% sure the board I have is functioning right - after upgrading to the AMD DX4-100 with a soldered on pin on the Resistor network, the machine locked up and stops POSTing all of a sudden while playing some games in Windows 3.1.
Testing the "Resistor Network" with a Multimeter shows 0.0003 Ohms Resistance and each group of 2 pins side by side is basically a "jumper" inside of the module. I think it's just supposed to be a 0 Ohm "resistor network" designed to jump a set of contacts. Using Staples as jumpers gives EXACTLY the same reading. Unless this component is actually damaged and should have some sort of resistance reading, but given the FIC manuals I've looked at that actually tell what these probably at, it's a 8P4R SIP (8 Pin 4 resistor Single inline Package).
Also looking to get a proper thermal unit, currently I've been using old Cyrix DX-2 66 stick-on heatsinks with 3-pin project fans from Vetco to do the job, works okay with my DX2-66 but not sure if I killed the AMD DX4-100 or not. It was running great for a few hours.
Looks Like This
And goes to the red square area of 8-pin jumpers up here
TLDR: Looking for 8-pin Resistor network used on First International Computer Motherboards (FIC) for CPU type selection, possibly another FIC 486-PVT board, and maybe a 486 Heatsink/Fan assembly that's actually suited to use with a DX4-100 or faster CPU.
Testing the "Resistor Network" with a Multimeter shows 0.0003 Ohms Resistance and each group of 2 pins side by side is basically a "jumper" inside of the module. I think it's just supposed to be a 0 Ohm "resistor network" designed to jump a set of contacts. Using Staples as jumpers gives EXACTLY the same reading. Unless this component is actually damaged and should have some sort of resistance reading, but given the FIC manuals I've looked at that actually tell what these probably at, it's a 8P4R SIP (8 Pin 4 resistor Single inline Package).
Also looking to get a proper thermal unit, currently I've been using old Cyrix DX-2 66 stick-on heatsinks with 3-pin project fans from Vetco to do the job, works okay with my DX2-66 but not sure if I killed the AMD DX4-100 or not. It was running great for a few hours.
Looks Like This
And goes to the red square area of 8-pin jumpers up here
TLDR: Looking for 8-pin Resistor network used on First International Computer Motherboards (FIC) for CPU type selection, possibly another FIC 486-PVT board, and maybe a 486 Heatsink/Fan assembly that's actually suited to use with a DX4-100 or faster CPU.