I haven't had time to spent in kernel hacking the last few month but
this week I got a 5000/240 and started playing around with this
thing. First result: This beast won't boot via tftp (broken PROM).
Now I have to find out how to convert the kernel image into a MOP
file and boot via mopd :-(.
Now the good news. By searching Digital's Web Site about Information
on this behaviour I stumbled across:
"The Design of the DEC 3000 AXP Systems, Two High-performance
In Chapter "6 I/O Subsystem" it says:
I/O Module-IOCTL ASIC
A key I/O subsystem design decision was to reduce time-to-market by
eliminating unnecessary new hardware and software development. To
support most of the I/O functionality, the designers chose the IOCTL
ASIC developed for the DECstation 5000 Model 240.
and to make things even better, these Alpha Workstations are pretty
well documented :-).
You may want to have a look at the "DEC 3000
300/400/500/600/700/800/900 AXP Models System Programmer's Manual"
available online at
>From what I have read so far, this I/O-Subsystem seems to be nearly
the same in all IOASIC DECstations, i.e. 5000/xx, 5000/1xx and
5000/240. There is hope!
may the source be with you