14 Aug
2019
14 Aug
'19
1:53 p.m.
On 2019-Aug-14, at 1:26 PM, Allison Parent via cctalk wrote:
IPhoned it in!
Well, the J11 ODT works fine with no memory.
I wouldn't have thought any of the (various 11 CPU) ODTs used interrupts for the
console, and so wouldn't rely on the presence of vector memory.
Don't know which CPU Noel was referring to.
On Aug 14, 2019, at 2:19 PM, Noel Chiappa via
cctalk <cctalk at classiccmp.org> wrote:
From: Jonathan (systems_glitch)
Yep, fun times on LSI-11/2!
Heh, this one was _utterly trivial_ compared to the 'must have working memory
at 0 or ODT won't start'! (I don't think I've ever seen that one in DEC
documentation anywhere...)
Noel
! Seriously?
The architecture of pdp-11 has
the first 256 words as interrupt
vectors and software locations.
Memory of some form there is
a must. How else would the console vectors at 60 work.