/vr/ - Retro Games

>>3680181
>a half year ago
>looking at some oldschool laptops on ebay
>forward 3 months
>bought a Toshiba Tecra 8000 in 8/10 condition
>300Mhz, 256 MB RAM (max), fully working stock 8GB HDD (replaced with newer and faster 40GB)
>thought that pretty much all DOS gaems would run perfect
>because of the Yamaha OPL3-SA3 ISA soundcard
>turns out that the video card (NeoMagic MagicMedia 256AV) has unexpected limitations
>scaler engine is locks the videomode to 60hz and ignores(?) CRTC writes (but remembers them)
>setting video output to external VGA only will fix these limitations
Well, the only 2 DOS games that have these 'underscan' glitches are The Incredible Machine (pic related) and Turrican 2 (yes, the PC port of the legendary Amiga version with these weirdass looking sprites).
I'm afraid that there are more DOS games out there that have these 'underscan' glitches or don't play well if their video mode is forced to 60hz.

Well, I wonder what your approach would be to fix this.
I think I have an idea what to do in this case but not much experience with x86, it's segments and how memory is managed in DOS. I only have experience with 6502, 65816, 8085 and 8-bit PIC microcontrollers.
Another common problem is that almost every damn game for DOS or Win9x eats all the CPU, is 300mhz too slow or do they all waste time with a busy wait loop?
Seems that throttling the CPU (by underclocking the FSB clock) doesn't seem to affect the performance at all but I wonder if there's a better alternative to this.