Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Paul Koning
> On Sep 1, 2018, at 4:18 PM, Timothe Litt wrote: > >> ... > >> I wasn’t able to figure out how to make it work in RSTS/E. > > To be bootable, a CD needs an appropriate boot block (LBN 0). For VMS, > it's written by 'writeboot' - not initialize. I don't remember the > details for RSTS -

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Johnny Billquist
On 2018-09-02 20:05, Paul Koning wrote: On Sep 2, 2018, at 5:55 AM, Johnny Billquist wrote: ... I wasn’t able to figure out how to make it work in RSTS/E. To be bootable, a CD needs an appropriate boot block (LBN 0). For VMS, it's written by 'writeboot' - not initialize. I don't

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Paul Koning
> On Sep 2, 2018, at 5:55 AM, Johnny Billquist wrote: > > ... >>> I wasn’t able to figure out how to make it work in RSTS/E. >> To be bootable, a CD needs an appropriate boot block (LBN 0). For VMS, >> it's written by 'writeboot' - not initialize. I don't remember the >> details for RSTS -

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Paul Koning
> On Sep 2, 2018, at 2:01 PM, Tim Shoppa wrote: > > Paul, I have never made a bootable RSTS/E CD, but I might suspect that it is > picky about being booted from read-only disk media. > > (I remember last version of RSTS/E bootable install tape wouldn't boot unless > the write ring was on!

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Paul Koning
> On Sep 1, 2018, at 2:38 PM, Zane Healy wrote: > > Create a virtual disk in SIMH the size of the CD-R blank. Prep the disk, > then burn it to CD-R. This is how I created my bootable CD’s for RT-11 and > RSX-11M+. I’ve then used those CD’s to do installs on my PDP-11/73. I > wasn’t able

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Lars Brinkhoff
Jordi Guillaumes i Pons wrote: > 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)? Hello, I'm sorry to bother you and everyone else on this list, but have been

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Jordi Guillaumes i Pons
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 va escriure: > On Saturday,

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-02 Thread Johnny Billquist
On 2018-09-01 22:18, Timothe Litt wrote: we might have done at DEC was mess with the block size on a CD DEC does not modify the physical sector format - it is implemented in the drive. VMS packs four 512 B logical sectors into one 2048 B physical sector; the driver handles buffering and

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Eberhard Heuser
Newer systems (alpha,itanium) have drivers for SCSI,IDE and USB, that accept "RAW"-I/O. That means that it is possible to read and write via SCSI-commands. You must use IO$_DIAGNOSE in your sys$qiow-command:     status = sys$qiow ( 1, gk_channel, IO$_DIAGNOSE,     _iosb, 0, 0,   

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Zane Healy
> On Sep 1, 2018, at 12:28 PM, Clem Cole wrote: > > below... > > On Sat, Sep 1, 2018 at 2:39 PM Zane Healy > wrote: > Create a virtual disk in SIMH the size of the CD-R blank. Prep the disk, > then burn it to CD-R. This is how I created my bootable CD’s for

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Timothe Litt
> CD's are normally 1024 byte blocks 2048 Bytes/sector is the ISO std for CD-ROMs (Mode 1).  Mode 2 omits ECC for2336 B/sector - but I don't know of a case where someone was crazy enough to use it for data. > we might have done at DEC was mess with the block size on a CD DEC does not modify the

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Clem Cole
below... On Sat, Sep 1, 2018 at 2:39 PM Zane Healy wrote: > Create a virtual disk in SIMH the size of the CD-R blank. Prep the disk, > then burn it to CD-R. This is how I created my bootable CD’s for RT-11 and > RSX-11M+. I’ve then used those CD’s to do installs on my PDP-11/73. I > wasn’t

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Zane Healy
Create a virtual disk in SIMH the size of the CD-R blank. Prep the disk, then burn it to CD-R. This is how I created my bootable CD’s for RT-11 and RSX-11M+. I’ve then used those CD’s to do installs on my PDP-11/73. I wasn’t able to figure out how to make it work in RSTS/E. I could create

Re: [Simh] SCSI-Interface for simh-vax?

2018-09-01 Thread Mark Pizzolato
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