unibus geeking; udisk update
brad at heeltoe.com
Thu Jul 5 22:05:23 CDT 2007
[keywords: unibus, pdp-11, disk controller emulation]
If anyone has an interest in low level unibus, I scanned in some screen
shots from my simple HP1650 and updated my udisk page. Nothing exotic,
just basic register reads, npr & br5.
I finally put the async cpld aside and started debugging the simple
synchronous state machine. The sync version works much better and is
(as you'd expect) much faster. I have some more debugging to do but
basic register i/o and dma work well and the cpu can now easily keep up.
I hope to prove out the prototype this summer and do a spin modulo
(last week all 3 of my 'real jobs' stalled simultaneously - woo hoo!
this week i have a pcb board stuck in customs in boston, so my fun
work is getting a time slot or two :-)
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