17 Oct
2018
17 Oct
'18
5:30 p.m.
On 10/17/2018 07:19 PM, Jerry Weiss via cctalk wrote:
On 10/17/18 1:53 PM, Don Stalkowski via cctalk wrote:
If it didn't it wouldn't be emulating real PDP-11 hardware.? I have a
number of RX02 systems and they do? not work with more than
256K.
bill
I'm trying to use a simulated RX02 disk
(under simh) with RT-11
and can't seem to get the DY driver to install.
Here's the relevant log:
sim> set ry enabled
sim> att ry0 ry0.dsk
RY: creating new file
RY: buffering file in memory
sim> c
.install dy
?KMON-F-Invalid device installation DL0:DY.SYS
.dir dy.sys
DY??? .SYS???? 4P 20-Dec-85
? 1 Files, 4 Blocks
? 14841 Free blocks
I've tried with 2 different software "kits", the one from the simh site
and the one from bitsavers.
Any ideas?
Thanks, Don
Try
set cpu 256K
set rx disable
set ry enable
show ry
RY??? address=17777170-17777173, vector=264, BR5, 2 units
? RY0??? 512KB, not attached, write enabled
??? double density
? RY1??? 512KB, not attached, write enabled
??? double density
Note: Apparently the RY emulation won't load if more than 256K memory
is specified as the DEC hardware did not support DMA in a 22bit box.??
I'm entirely not sure why SIMH has to enforce this as its possible to
work around (e.g. TSX+ supports buffering the IO). Anyone know how to
override and load in SIMH?