jackrubin
Veteran Member
Sheesh, Don - have mercy!
I'll send you the ROM Real Soon Now (tm).
I'll send you the ROM Real Soon Now (tm).
Sheesh, Don - have mercy!
I'll send you the ROM Real Soon Now (tm).
Not to worry - no offense taken. I don't have anything to run it in or read it on, but I'll send the board off to you this week.
Just kidding. I don't really need the physical PROM, just the 64W octal image dump would do, if you can put in in an M9312 and use ODT to dump the bits.
Otherwise I can read the physical prom as a hex file and disassemble the bits back to source (I wrote some tools to do that for all the other PROM images).
Don
As an aside, I suspect it is similar to the MSCP DU boot prom, but I tried writing an MU version based on documentation, and just could not get it to fit in 64W.
So I am technically interested in what shortcut(s) DEC could take to get the MSCP command sequence for booting from an MU device.
There may just be some magic pattern you shove into a register to make it happen. Just guessing. IDK.
And FYI the very first entry in the table on http://www.ak6dn.com/PDP-11/M9312/ is the source/listing code for the M9312 console ODT ROM for the 11/04-34 series CPUs.
Don
Sheesh, Don - have mercy!
I'll send you the ROM Real Soon Now (tm).
Thanks Jack!
I got the board today, pulled the MU boot prom, read it, and converted it back to source/listing/hex file for the device.
The results have been uploaded to my site: https://www.ak6dn.com/PDP-11/M9312/ and are under the 23-E39A9 'MU' boot device entry.
Surprisingly (or maybe not) there is no magic sequence or anything like that. Basic TMSCP commands but not as complete as most toggle-in bootstraps. Ie, there is no 'rewind' command given, just go ONLINE and READ blocks. So this boot PROM is not quite as robust as is, for example, the SIMH boot code for MU.
Don
And FYI if anyone needs any device boot PROMs I have blank NOS devices where I can program any device from my website using an EEtools TopMaxII programmer.
Also have lots of the common devices (DL, DY, etc) from DEC boards available. Nominal cost of $5 per device plus shipping for anyone interested.
An additional FYI I found actual 23-E32A9/23-E33A9 'XE' DELUA/DEUNA net boot devices that I had previously acquired (and misfiled).
I read these and converted to source/listings/hex files are they are now up on the website under: https://www.ak6dn.com/PDP-11/M9312/
Don