From mboxrd@z Thu Jan 1 00:00:00 1970 From: downing.nick@gmail.com (Nick Downing) Date: Sun, 8 Nov 2015 16:39:43 +1100 Subject: [TUHS] System III - TCP/IP In-Reply-To: <20151108051028.GA32246@cowbell.employees.org> References: <20151107200358.Horde.M1lYZZyTC4t0Qb8KrygKzhy@avocado.salatschuessel.net> <20151107192043.GA11895@mcvoy.com> <20151107231338.Horde.d8EIgIMMf9VYCExfovc2K_M@avocado.salatschuessel.net> <20151108051028.GA32246@cowbell.employees.org> Message-ID: I think you might get better mileage by just trying to port 2.11BSD over to your Z8001 device, since it is a self contained system, no interface hacking will be needed, just porting. You will have to hack in the device drivers for your disks, ports etc, and create a bootstrap and do a little assembly hacking for the memory management, the context switches, exec() and system calls, BUT you have all this in your Sys3 source anyway. I think it would be easier and cleaner to do this than try to transplant a lot of gory internals. My own experience in this was I wanted TCP/IP running on a Z180 machine (1MB RAM but 64k address space with a very basic MMU), so I started with a primitive unix called UZI see http://www.dougbraun.com/oldstuff and hacked in sockets from NOS see http://www.qsl.net/ah6rh/am-radio/packet/jnos.html and honestly it took months, was incredibly tedious and bug-prone, very detailed interfacing work and restructuring to get things like socket timeouts to work, expose functionality via system calls and so on... I reached a point where I was medium satisfied but then my laptop got stolen and I had to revert to month-old backup and decided to throw it away and start again. I also did not finish the 2.11BSD port but I got as far as making 2.11BSD cross compile from a linux system, was going to drop in the Z180 cross toolchain as the next step, but for whatever reason put it aside. I am happy to pass on what I have. Nick On 08/11/2015 4:17 PM, "Derek Fawcus" wrote: > On Sat, Nov 07, 2015 at 11:13:38pm +0100, Oliver Lehmann wrote: > > > > It is basically a pcc as of 1981 with whatever Zilog hacked into it > > additionally. I once tried to get a current pcc onto the system but... > > yeah... I guess I lack skill ;) > > - the new PCC would need to create Z8001 ASM code.... something I lack > skill. > > - an optimizer... haha... no way I could even optimize Z8001 ASM code > by > > hand ;) > > - if a new linker is needed - how to create Zilogs s.out format... > > - I guess I would need to recompile the whole kernel with this new > compiler > > to have every object work "together" - but I still lack some sources > (most > > of them I "retranslated" from disassembled object files to C code - but > 2 or > > 3 are just are too hard to retranslate) > > I also had a look at the C-Compiler which comes with Plexis SYSIII (which > > is available as source somewhere in the WWW) but this is a compiler > capable > > of non-segmented executables (one 64K segment adressable) only but I > need a > > Compiler creating segmented executables (128 64k segments accessable = > 8MB > > address space) > > Older versions of gcc (around 3.3/3.4) supported the z8000 family, so you > could try using it to make things easier. Have a look here: > http://www.z80ne.com/m20/sections/download/z8kgcc/z8kgcc.html > which seems to be a version supporting segments - the '-mz8001' switch. > > DF > _______________________________________________ > TUHS mailing list > TUHS at minnie.tuhs.org > https://minnie.tuhs.org/mailman/listinfo/tuhs > -------------- next part -------------- An HTML attachment was scrubbed... URL: