It's actually pretty easy. After booting RDOS, press ^E to return to the
sim> prompt. Then, attach a host file to the MTA0 unit. If you give a host
filename that doesn't yet exist, SIMH will create an empty tape file and
attach it to MTA0:
sim> attach mta0 testtape.tap
MTA: creating new file
sim>
Then, give the simh G command to return to RDOS and init/f the MT0 tape
unit. Note that at the sim> prompt, the unit is called "MTA0" (or MTA1,
MTA2, etc), while in RDOS the unit is called "MT0" (or MT1, MT2, etc):
sim> g
<presss return to get the RDOS prompt again>
R
init/f mt0
CONFIRM? <press Y to confirm>
R
Now you can dump or copy files to the MT0 device:
dump/v mt0:0 -.sr
LITMACS.SR
OSID.SR
NSID.SR
PARS.SR
ALMSPD.SR
<etc.>
R
dump/v mt0:1 -.sv
BURST.SV
INITIALIZE.SV
SEDIT.SV
MACXR.SV
EDIT.SV
<etc.>
R
release mt0
R
After releaseing the tape, press ^E again to get to the sim> prompt and
detach the tape file:
^E
sim> detach mta0
sim>
Now you can inspect the testtape.tap tape image.
Attaching an existing tape file is similar, except that at the RDOS prompt
you'd do INIT rather than INIT/F:
sim> attach mta0 testtape.tap
sim> g
R
init mt0
R
load/n mt0:0
LITMACS.SR 10/20/83
OSID.SR 01/10/84
NSID.SR 10/20/83
PARS.SR 01/31/85
<etc>
R
load/n mt0:1
BURST.SV 05/09/85
INITIALIZE.SV 05/02/85
SEDIT.SV 05/02/85
<etc>
R
release mt0
R
Hope this helps,
...dell
On Sat, 14 Nov 2015, Microtech Dart wrote:
Hi, I am completely new here, although I recognize the names of several who
post here.
I am trying to resurrect an extinct Microtech machine from 1982, which
likely used the Point 4 processor, and the SimH DG Nova simulator *should*
be compatible with the Point 4.
I'm running the NOVA simulator now, with:
NOVA simulator V4.0-0 Beta git commit id: 3be5125d
sim> ATTACH DKP0 *rdos_d31.dsk*
sim> set tti dasher
sim> boot DKP0
I'm teaching myself RDOS now with the RDOS_Command_Line_Interpreter Manual.
<http://www.mirrorservice.org/sites/www.bitsavers.org/pdf/dg/software/rdos/093-000109-01_RDOS_Command_Line_Interpreter.pdf>
Would anybody here be able to suggest some methods by which I could
*create* a magnetic tape device on this SimH Nova simulator, and how I
might write some files to that?
I think that would be an excellent experiment for me to attempt. Then I
can inspect the binary file in a hex editor, and see what it looks like,
then compare to the binaries I've pulled off my Microtech/Point 4 tapes.
--
Thanks,
-AJ
http://MicrotechM1.blogspot.com
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