I tried to modify my IA-1., but I did some mistakes :(
Ihave 400MHZ AMD-K6-2 .
it has 2.2V for Core.
the original CPU 266Mhz, has 1.9 V core
*) Change FSB multiplier to 100Mhz. through resoldering SMD resistor.. it's working, the dispaly show 400 Mhz (cause default multiplier 4X).
*) trying to boot from original msn image and beos image. it is working partially, the booting stop after showing msn logo and beos "beia" logo.
*)set back to 66 MHz FSB , working like charm, and set it back to 100 Mhz FSB
*)boot the machine, it boots and, hangiing on msn logo or beos "beia" logo.
*)reboot and modify the bios configuation. and save and exit.
*) reboot and, my IA-1 is do nothing.. no backlight or sign of life on screen.
I'm just suspecting the IA-1 power supply is very limited, and the best way upgrading is through AMD K6-2+ or K6-3+, which withdraw less "watts" comparing with legacy AMD K6-2
now, my IA-1 serves me as spare parts for my another IA-1. and end of story.........:)