Short test programs for pdp 11/34

devin davison lyokoboy0 at
Sun Sep 25 21:52:12 CDT 2016

Thanks for all the helpful information. The machine looks to be working. I
found a few different key in programs. I can get to the console emulator
prompt on the attached vt100. I keyed in a few short programs to write to
the vt100 and they worked as expected. One step closer. I am about to
install the disk drive controller and connect the drive, i do have a bunch
of disks labeled for rsx, what is the procedure for booting off of a disk

On Sat, Sep 24, 2016 at 4:11 AM, Don North <ak6dn at> wrote:

> On 9/23/2016 6:15 PM, Paul Popelka wrote:
>> You might try looking at the M9312 proms that Don North has made
>> available here:
>> If you have an M9312 in your system it will have the basic console prom
>> in it.
>> There are listings of the prom contents on that web page.
>> There is also a simple diagnostic prom that loops forever near the bottom
>> of the page.
>> If you don't have an M9312 then you could probably key in a program from
>> the rom listings provided.
>> I'd bet Don will be along shortly to provide a better explanation.
> Basically correct. The 'ZZ' pseudo boot PROM I generated just runs the
> basic diagnostics contained
> within the associated 248F1 11/04-34 console PROM in a continuous loop.
> The diagnostics are very simple, and do a number of datapath and register
> checks, as well as a low memory
> (0-28KW) write/read/check confidence test.
> Not comprehensive by any means but having the diag in PROM and not reliant
> on any peripherals (except
> the console TTY interface) is sometimes a very useful starting point for
> system debug.
> If anyone wants one of the programmed console PROMs (a 256x4 82S129)
> programmed with the ZZ pattern
> just ping me at the email address shown on the above mentioned website (or
> this post).
> I can also provide programmed 82S129 devices for any of the other
> available DEC boot PROMs should anyone
> need one.
> Cost will be free for low quantities (ie one or two for personal use).
> Cost negotiated for larger quantities.
> Don

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