20 Jul
2015
20 Jul
'15
4:56 a.m.
Hey folks. Can anyone tell me offhand how to map the I/O page into a
task's address space under RSX-11M in Macro-11?
Thanks,
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
5:33 a.m.
Dave,
I think you are asking about a /PR:5 privileged task. In the
RSX11M documentation (not M+) get the manual:
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/rsx11/RSX11M_V4.1_Apr83/4_…
then go to page 6-5 and specifically example 6-1. This task maps the
I/O page and also much of the RSX executive so that data structures in
RSX are available. Be careful with these tasks because if they hit an
error RSX crashes.There is also a /PR:4 task but the RSX executive
must be less than 16K and most are not.
Good Luck,
Mark
On 7/19/15, Dave McGuire <mcguire at neurotica.com> wrote:
Hey folks. Can anyone tell me offhand how to map the I/O page into a
task's address space under RSX-11M in Macro-11?
Thanks,
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
12:12 p.m.
On 2015-07-20 04:56, Dave McGuire wrote:
Hey folks. Can anyone tell me offhand how to map the I/O page into a
task's address space under RSX-11M in Macro-11?
There are several ways. The easiest is to build the task privileged (/PR
to TKB). Such a task will be limited to 2 APRs (5 & 6), while APRs 0-4
are mapped to the kernel and APR 7 is the I/O page.
Another way is to switch to kernel mode in the task using SWST$. For
this, you still need to build the task privileged, but you can build it
without getting the limited address space mentioned above.
A third is to create a common region which is the I/O page, and then
task build against that common region, or else create a window to that
region at runtime, using CRRG$ and MAP$.
The common region way is documented in some manual, but I don't remember
offhand which one.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
21 Jul
21 Jul
6:21 a.m.
I got it working. Thank you Johnny, Oleg, and Mark!
-Dave
On 07/20/2015 06:12 AM, Johnny Billquist wrote:
On 2015-07-20 04:56, Dave McGuire wrote:
--
Dave McGuire, AK4HZ
New Kensington, PA
Hey folks. Can anyone tell me offhand how to map the I/O page into a
task's address space under RSX-11M in Macro-11?
There are several ways. The easiest is to build the task privileged (/PR
to TKB). Such a task will be limited to 2 APRs (5 & 6), while APRs 0-4
are mapped to the kernel and APR 7 is the I/O page.
Another way is to switch to kernel mode in the task using SWST$. For
this, you still need to build the task privileged, but you can build it
without getting the limited address space mentioned above.
A third is to create a common region which is the I/O page, and then
task build against that common region, or else create a window to that
region at runtime, using CRRG$ and MAP$.
The common region way is documented in some manual, but I don't remember
offhand which one.
Johnny
3204
days inactive
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days old
4 comments
4 participants
participants (4)
-
bqt＠softjar.se -
form＠pdp-11.org.ru -
mark＠matlockfamily.com -
mcguire＠neurotica.com