Very interesting! I'll look a little closer in a bit... One of the nice things about the c128 is the built in MMU...which allows remapping of page 0 and page 1 (zero page and stack, respectively) at any given moment. The same thing is possible with the 65816/65265 CPUs, which are the next target. If you also use the o65 format, you can do software relocation. There are still limitations of course, but the barriers are lower given those things... Curiously enough, this thing is what drew me to ELKS to begin with...I figured that a 8088 kernel would be close to what I wanted to do. :) --- On Wed, 3/28/12, David Given <dg@xxxxxxxxxxx> wrote: > From: David Given <dg@xxxxxxxxxxx> > Subject: Re: 8-bit Linux? > To: "linux-8086@xxxxxxxxxxxxxxx" <linux-8086@xxxxxxxxxxxxxxx> > Date: Wednesday, March 28, 2012, 11:03 AM > Gábor Lénárt wrote: > > Hi, > > > > On Wed, Mar 28, 2012 at 07:50:19AM -0700, Chris Cureau > wrote: > >> For what it's worth...I still haven't given up on > my dream of Unix on the 6502. :) I've got a good bit > already written that will run on a Commodore 128 and working > on a ramdisk for those who have external RAM (or an > emulator!) > >> > >> Blazing 2MHz speeds, no memory protection...and I'd > bet it could handle multiple users with the ramdisk once all > is said and done. :) > > > > Interesting, indeed :) What I wanted once, just for a > wild idea (I guess it > > would be unusable slow, but just for the "feeling"): > using the non-MMU Linux > > port (so not elks) eg for Amiga or similar, and write a > motorola 68K CPU > > "emulator" for the C64 DTV (where 2Mb RAM should be > enough for "something" - > > and yes, it's not a "C64", maybe with SuperCPU it would > have been better) > > Have you seen Uzi? > > http://www.dougbraun.com/uzi.html > http://www.cpmclub.de/zeitung/seite5.htm > http://uzix.sourceforge.net/ > > It's a SysV Unix kernel for the Z80, intended to run on CP/M > machines. > Okay, it's a Z80 and not a 6502, and the 6502 has certain > unique issues > with multitasking or running C (non-relocatable/fixed > size/fixed-location stack, ugh), but it might be interesting > to look at. > > -- > ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ > ───── http://www.cowlark.com ───── > │ "Parents let children ride bicycles on the street. But > parents do not > │ allow children to hear vulgar words. Therefore we can > deduce that > │ cursing is more dangerous than being hit by a car." --- > Scott Adams > > -- To unsubscribe from this list: send the line "unsubscribe linux-8086" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
