First post, by perhenden
I've got this Asus ISA-486 motherboard [1] with an Intel 486 DX2/66 CPU.
It only registers as 50MHz [2], even though I've set the jumpers for 33MHz (x2).
The CPU is labeled as 66MHz, and another 66MHz CPU also register as 50, even though they appear as 66 on another motherboard.
Specifically I've set J2=2-3 and J3=1-2, following the jumper manual at
[http://www.win3x.org/uh19/motherboard/show/806]
The turbo switch is set to 'enabled' (closed).
Is there something I can do to make it run at 33MHz base? There is only a jumper setting that says 25/33, not a specific one for 33.
[1] Revision 1.4. Bios version 1.0.2 (05/05/91). Bios string 40-0102-001292-00101111-050591-SIS-486-F.
[2] CHKCPU, HWInfo and QAPlus all report the CPU as 50 MHz, at 2x25MHz