Spent a few more hours building dosboxes and tweaking dosbox.conf.

Nothing i've tried can get dosbox 0.70 running anywhere close to the speed of the fastest build of 0.65. It's like 4 fps vs 16 fps in simple ega games, and the sound stutters awfully. This really requires an arm + gdb guru to profile and optimize.

However, Ultima IV looks gorgeous with advmame2x scaling , and it runs about as fast as it did on my old IBM PC. Reducing the buffer size of the pc speaker fixed the sound lag. (edit) see the Xu4 thread in Gaming section.

Also requires a keyboard, obviously. The touchscreen keyboard hasn't been implemented.

Lastly, even though i am disabling networking in the config.h, SDL_net is hardcoded into makefiles and includes, so the binary isn't standalone executeable on a 770/800 yet.

If any code warriors out there want to look at this, i can share my config.h SDL_net and and dosbox.conf.

(edit) The benchmark program MIPS 1.10 reports my current best build of DOSBox 0.65 running at the exact same average speed as an IBM PC/AT 8086 8Mhz. I'd be curious to hear how the n800 fares.

MIPS download here: ftp://ftp.simtel.net/pub/simtelnet/m...sinfo/mips.zip