On Sun, Jan 18, 1998 at 01:25:01PM +0100, Michael Engel wrote:
> due to the overwhelming amount of requests regardings the DECstation port
> during the last few weeks ;-), we should do something to get the port further
> I will set up a mirror site of Paul's DECstation information pages on Monday
> and would like to ask all people who have DECstation patches to upload the
> patches to ftp://ftp.math.uni-siegen.de in /incoming.
I suggest to collect all the stuff on the fnet machines, so ``customers''
can do one stop shopping.
> We should try to find out what the biggest problems in the current
> state of the port are. Areas that IMHO need work are:
> - Interrupt handling
> - MMU setup and handling
Those two are the hard part. Not too hard, though.
> - of course, device drivers:
> o Ethernet (Lance 7990) - should be able to derived from the Sparc port,
> major difference is that the Lance has a separate memory area in at
> least the DS100 and 5000/200 and isn't able to do DMA.
> o SCSI in DS100 - the DEC SII chipset. Documented in the DS3100
> functional specs
> o SCSI in almost (?) all other DECstations - NCR53C94. Is this chip
> documented ?
It isn't only documented, it is supported in a lot of different incarnations.
Thomas Bogendoerfer is supporting it for his Olivetti, a machine that is
probably has a quite a bit more complex DMA principle than the DECstations.
Talking about the NCR, I found some minutes for hacking. The NCR53C8XX
driver is now working like a charm.
> o Console drivers (I got some of these working with the DZ11) - a DZ11
> compatible UART in DS100 and 5000/200, a Zilog 8530 in at least the
> Personal DECstations and the DS5000/1xx.
Z8530 support exists for the Sparcs and SGI and two other, yet unpublished
machines under Linux/MIPS.
> Support for the DS100 frame buffer also exists.
> We should also examine the differences between the various REX- and
> non-REX firmware versions in the various DECstations.
> o TurboChannel support - probing for cards etc. and support for the most
> important TC options - PMAG-[AB]* graphics adapters, ethernet and SCSI
> controllers (which are simply TC versions of the Lance and NCR53C94).
> Well, we also have a nice 24-bit i860-accelerated graphics board here ;-)
> [So you say that's almost everything - hmmm, maybe you're right ;-)]
> Probably it is also a good idea to make a list of the hardware that is
> available for testing kernels.
> I have a DS2100, a 5000/25, a 5000/120 and a 5000/200 and can get
> access to 5000/33's, 3100's and 5000/240's at University.
> I would personally also like to support the first-generation TurboChannel
> AXP machines (3000/00) as the Alpha developers don't seem to be
> interested in these ... but I still don't have such a machine :-(.