Re: Got DSM-11 running, any manuals online?

If so, then that's probably what the RQDX1/2 format *was*: Just a big bunch of 512 byte blocks, starting at zero and going up to the top. The controller had to know the geometry of the drive in order to move the heads, know how many cylinders there were, etc. One thing I did notice is the

Re: Got DSM-11 running, any manuals online?

On Fri, Jan 8, 2021 at 6:17 PM Paul Koning wrote: > Yes, but also to hide bad blocks. So the difference between a raw sector > dump and a SIMH container file is, minimally, the spare sectors. What that > looks like depends on the format; I have no idea what MSCP controllers did. > MSCP

Re: Got DSM-11 running, any manuals online?

On Fri, Jan 8, 2021 at 6:16 PM Chris Zach wrote: > True, however SIMH has to write things to a "real" file that emulates > something of a disk. > I thought the SIMH representation of an MSCP disk was just a linear array of 512-byte blocks, from block 0 to block n-1, in which case, it's still

Re: Got DSM-11 running, any manuals online?

A copy of the disk image is at https://www.crystel.com/pdp/dsm-11.30.dsk Feel free to put it on more stable archives. It appears to be a freshly genned system. CZ On 1/8/2021 1:16 PM, Sergio Pedraja wrote: Any copy of this software available to play with? Sergio El vie., 8 ene. 2021

Re: Got DSM-11 running, any manuals online?

> On Jan 8, 2021, at 2:57 PM, Eric Smith via cctalk > wrote: > > On Thu, Jan 7, 2021 at 7:38 PM Chris Zach via cctalk > wrote: > >> Oddly enough SIMH seems to read a raw RQDX1/2 disk pretty well. >> > > That's good to know, but not really all that odd. Arguably the main purpose > of MSCP

Re: Got DSM-11 running, any manuals online?

True, however SIMH has to write things to a "real" file that emulates something of a disk. In this case I'm guessing it writes more as a super powered RQDX2 in that the first cylinders do not have the disk parameters and other odd stuff. Which makes sense as the RQDX1 and 2 are simpler

Re: M688 Flip Chip Unibus Power Fail Driver Modules

Noel said > (I said) > There is an 11/15 > > ??? Is that a typo for 'PDP-15'? The -11/15 looks just like an -11/20 > > https://www.ricomputermuseum.org/collections-gallery/equipment/dec-pdp-1115 > > except it only has 16 address switches, not 18 as on the /20. (The front panel > shown there

Re: Got DSM-11 running, any manuals online?

A slightly newer version (3.3) is available from bitsaver.org/bits/DEC/pdp11/dsm-11 John. > On Jan 8, 2021, at 1:16 PM, Sergio Pedraja via cctalk > wrote: > > Any copy of this software available to play with? > > Sergio > > El vie., 8 ene.

Re: Got DSM-11 running, any manuals online?

On Thu, Jan 7, 2021 at 7:38 PM Chris Zach via cctalk wrote: > Oddly enough SIMH seems to read a raw RQDX1/2 disk pretty well. > That's good to know, but not really all that odd. Arguably the main purpose of MSCP was to abstract away drive and controller differences.

Re: Got DSM-11 running, any manuals online?

Any copy of this software available to play with? Sergio El vie., 8 ene. 2021 3:38, Chris Zach via cctalk escribió: > Well, with Dave's help we got the DSM-11 disk to boot on SIMH. Oddly > enough SIMH seems to read a raw RQDX1/2 disk pretty well. > > sim> attach rq0 dsm.dsk > sim> set cpu

Re: Got DSM-11 running, any manuals online?

> On Jan 7, 2021, at 9:38 PM, Chris Zach via cctalk > wrote: > > Well, with Dave's help we got the DSM-11 disk to boot on SIMH. Oddly enough > SIMH seems to read a raw RQDX1/2 disk pretty well. > > ... > > The problem is I don't remember how to use it anymore. Is there a PDF of the >

Re: M688 Flip Chip Unibus Power Fail Driver Modules

> From: Steven Malikoff > Would that be part of this system at a Japanese computer museum? ... > the 11/05 has 'Unichannel15' on it Yes, the 3 bays in the center are a PDP-15. (The indicator panel at the top of the center bay is the one for the PDP-15 CPU; you can see it here: