Mark, I’ve got two QBUS interface cards installed in my VAX 4000-200 and uVAX 3300 systems. I think I’ve got no docs though. Would that be of any help (ie, testing stuff on real hardware)?
Jordi Guillaumes Pons El 1 set 2018, a les 20:36, Mark Pizzolato <m...@infocomm.com> va escriure: > On Saturday, September 1, 2018 at 10:45 AM, Eberhard Heuser wrote: >> Are there any plans to add a SCSI-Interface to the VAX-code? >> >> I want to add the CD-R burning capability but there is no interface >> (SCSI or IDE) that allows to communicate on the diagnose level >> with an CD-drive. >> >> I have seen that one can access a physical CD-drive but only through >> the pudriver and not via the pkdriver. > > Well, none of the current VAX simulators had a native SCSI interface > which was interfaced with the pkdriver. Without a simulated system > there is no place for SCSI support. > > Meanwhile, 99%+ of the host systems are natively capable of burning > CD/DVD. I am not aware of any DEC supplied software running on > VAX/VMS which was capable of producing a CD image in the ISO 9660 > file system format. All CDs that I ever encountered on DEC systems > (produced by DEC for use on VMS systems) had ODS2 file systems on > the CD media. All of the existing VAX simulators can easily produce an > ODS2 disk image of arbitrary size which can then be readily written on > the host system to CD or DVD media with host supplied tools. > > Even if a simulator comes along which does have a built in SCSI support, > arbitrarily extending that support to interface with CD/DVD media for > burning activities would be a challenge to achieve in a portable way > to work on most host platforms and as such probably won't get done > unless you're interested in taking on the project. > > After thinking a little more, I vaguely recall that there was indeed a > Qbus board which had a SCSI chip that used the PKDRIVER. This > was called the KZQSA. I tested one once and was fundamentally > unimpressed by its performance primarily due to it not being a > DMA device. In any case, I haven't seen any detailed documentation > on this board which would be necessary to write a simulator of it, > but if you can find documentation, feel free to take a crack at > simulating it, and delving into the host platform complexities (in > a portable way) to burn CD media. > > - Mark > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
