On Tue, Oct 31, 2000 at 06:44:25PM +0000, Tony Duell wrote:
> > 68010 and probably the same HP DMA chip too. The DIO-I bus is pretty
>
> The DMA chip is a Motorola part, 68440 IIRC. It appears to br a 2-channel
> version of the 68450 (which is 4 channels)
>
Argh, now I have rip open one of my machines. I was always under the illusion
that the DMA chip/board in the 300 series was made by HP.. gotta check.
Anyway, at least some of the hp300 machines have HP 98620 DMA
"card". The 320 has 98620B, then there are revs 98620A and 98620C.
At least the 380 (and 382) have 98620C which has 2 channels.
I would *love* to have some *good* hardware docs for the 300-series (oh well,
the 500-series too :) as I'm trying to hack together a driver for the
parallel port on some of the 300-series machines. Finding reasonable
information is, ummm, challenging. Anyway, I have the register definitions,
I *think* I know how the FIFO behaves but I still have some things I don't
know.
And I still don't know how to build an SRM-network (sigh).
--
Jarkko Teppo
jate_at_uwasa.fi
Received on Wed Nov 01 2000 - 02:24:58 GMT