Hi Phil :o), The only problem with pure emulation is writing a good emulator for an MMU. I wrote a SPARC V8 instruction set emulator a year ago and stopped around the time I had to face the fact that a direct virtual->physical mapping would no longer be of any use. (also the semester started again :o). Not that it's not possible, but it's difficult and would require a mapping with every memory access (being very slow). However, a little creative help from the kernel and some creative mmap()ing might do the job (you can request a specific linear address with mmap()). If anyone knows some good methods for doing this, please inform! (and I might finish that emulator :o) William On Wed, 25 Jul 2001, Phil Hopely wrote: > > I do not know if you have examined any of the current open source emulation > projects that exist, but I believe > you might be interested to examine www.mame.net or mess.emuverse.com? > > They have a cpu core for mips emulation, I believe it may only be r3000 > though?.. > > Also, there exist numerous open-source playstation emulators, which I believe > are r3000 based too... > > The mame & mess projects are matured open-source projects that have been ported > across the universe, they're really pretty cool, this work would be a likely fit > with the mess project. > > If you implement by way of pure emulation, you'd not need to change the kernel > at all? > > Phil > > "John D. Davis" wrote: > > > I am modifying the linux kernel to be able to be run by a simulator. I > > need to modify the console driver and interrupt handler. I have been > > going through the various files, console.*, tty.* and the serial files to > > see how to interface to the console. I have also read some kernel korner > > articles, but they seem a little out of date. Is there any other > > recommended documentation on the console driver and how it works on an > > indy? I am trying to sort out the low-level interfaces from the > > higher-level ones. I just need to change the low-level interface from > > using the hardware to using the simulator interface. > > > > thanks, > > john > > > > -- > > To UNSUBSCRIBE, email to debian-mips-request@lists.debian.org > > with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org >
