There are different methods to determine available XMS size, mostly via BIOS calls. The issue with memory size might be a BIOS bug. It's clock is affected the same way as CPU so it might indicate some issue with the system timer. As for the FPU, that can't be detected using software means. Maybe try to disable the CPU Reset Method 1 if that causes some issue with timers. This is measured using the 8253 Timer (counter 2) and it seems that on some systems this gives incorrect results. I have to admit that I have no idea why the CPU clock on 386SX is reported so off. Sadly I can't provide a debug log at this time, this mobo is now at a different location. So I thought it might be a BIOS issue but why does it affect only certain programs? It's on this mobo, with 8M installed, that HWiNFO works with HIMEM loaded but complains about free XMS memory without it (and quits). Copy code to clipboard 1 CMOS reports: conv_mem= 640K, ext_mem= 15,360K, Total RAM= 16,000KĢ BIOS reports: ext_mem= 15,360K Total mem: 16 MB
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