Re: [Simh] TE16 CRC Errors

2017-11-08 Thread Paul Koning
> On Nov 7, 2017, at 8:01 PM, Johnny Billquist wrote: > > On 2017-11-08 01:54, Paul Koning wrote: >> ...RSTS definitely did not. It does support mixed RP/RM massbus, which is >> more usual but not universal either, I think. But no mixing disk and tape. > > Thanks. I was

[Simh] TE16 CRC Errors

2017-11-07 Thread Jon Elson
On 11/07/2017 07:36 PM, simh-requ...@trailing-edge.com wrote: In RSX land, only M+ supported mixed massbus, as you mention. Not sure when/if VMS did. Not sure how much of anything else that might have supported it either. I am pretty sure VMS would permit such a configuration, but it would

Re: [Simh] TE16 CRC Errors

2017-11-07 Thread Larry Baker
Peter, I answered my own question. The VAX/VMS Version 1.6 SPD (http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/AE-C770D-TE%20VAX-VMS%20Operating%20System,%20Version%201.6%20SPD%2025.1.4.pdf) specifically states Mixed-MASSBUS configurations were supported: NOTE: MASSBUS disk

Re: [Simh] TE16 CRC Errors

2017-11-07 Thread Johnny Billquist
On 2017-11-08 01:54, Paul Koning wrote: On Nov 7, 2017, at 7:49 PM, Johnny Billquist > wrote: I actually don't think he has a mixed massbus. I don't think you could even configure simh for this. Simh have a very simplistic view on hardware

Re: [Simh] TE16 CRC Errors

2017-11-07 Thread Paul Koning
> On Nov 7, 2017, at 7:49 PM, Johnny Billquist wrote: > > I actually don't think he has a mixed massbus. I don't think you could even > configure simh for this. Simh have a very simplistic view on hardware > configurations. > You don't configure massbuses, and put devices on

Re: [Simh] TE16 CRC Errors

2017-11-07 Thread Johnny Billquist
I actually don't think he has a mixed massbus. I don't think you could even configure simh for this. Simh have a very simplistic view on hardware configurations. You don't configure massbuses, and put devices on them. You normally just configure the devices, and all the bus and controller

[Simh] TE16 CRC Errors

2017-11-07 Thread Larry Baker
Peter, My reading of your hardware setup sounds like what was called a "Mixed-MASSBUS" configuration, that is, mixing disks and tapes on the same MASSBUS. PDP-11 RSX-11M-Plus supported Mixed-MASSBUS. We dual-ported all our disks and used the MASSBUS that came with our tape drives that way.