Expected perfomance of a AM386SX-40 machine \ VOGONS

Expected perfomance of a AM386SX-40 machine

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First post, by bloodbath2you

Posted on Yesterday, 21:34

bloodbath2you Offline

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Hi, i have a M396F rev v2.7 board with a AM386SX-40 and a ITT XC87SLC-33 math copro

https://theretroweb.com/motherboards/s/pcchips-m396f-v2.7

This board had the typical battery leak issue and i had to fix some traces, also modded it so it could use 3.3v coin batteries.

The thing is, i have a feeling that it is not performing as it should, with LM20 benchmark i get 39 MHz AT perfomance, which seems quite low to me, but i could be wrong

Right now It uses the stock bios, with some tweaks with AMISETUP, mostly for enabling slow refresh. There is little difference with stock settings anyways

Any experience with this board?

Reply 1 of 1, by keenmaster486

Posted on Yesterday, 22:55

keenmaster486 Offline

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Remember the SX has a 16 bit bus and LM20 is a 16 bit benchmark, and the SX performs like a 286 clock for clock on 16 bit code, so LM20 reading it as a "~40 MHz AT" is exactly what I would expect from a system like that.

World's foremost 486 enjoyer.

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