Timers Problem?

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James-F
Posts: 69
Joined: Tue 30 May, 2017 10:26 am

Timers Problem?

Postby James-F » Sat 03 Jun, 2017 8:14 am

This is from a user on Vogons.
https://www.youtube.com/watch?v=s9f9r0ah7VA
https://www.youtube.com/watch?v=pz0vgv9wShE

It appears that PCem runs too fast compared to the real machine or dosbox.

Also, PCem having hard time emulating Pentium 133 on a i7 3770K 3.9GHz machine, the 'CPU time' is maxed most of the time.
Battler
Posts: 793
Joined: Sun 06 Jul, 2014 7:05 pm

Re: Timers Problem?

Postby Battler » Sat 03 Jun, 2017 12:42 pm

- James-F: I told you to get an idle driver for DOS, as the maxing out is due to EMM386 doing things that makes the dynamic recompiler go crazy and idle drivers solve that.

Edit: As for the timers, I think I told Sarah in the past that improvements are needed. For one, I noticed that they seem to "skip a bit" regularly, and for two, I suggested last year already that the timer counters and enables be increased to 64-bit because on the faster emulated CPU's, they reach the 32-bit maximum quite easily, potentially messing things up.

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