DEC Pro operating systems and MFM emulator

Bill Gunshannon bill.gunshannon at
Sun Jan 24 10:03:21 CST 2021

On 1/24/21 10:38 AM, Paul Koning via cctalk wrote:
>> On Jan 23, 2021, at 4:00 PM, Cameron Kaiser <spectre at> wrote:
>>>>> 2. Venix: panic at boot, "Bad access number".  That doesn't mean anything
>>>>> to me.  I wonder if the issue is that Venix doesn't support the 380.
>>>> The Venix image is special. Venix doesn't support more than 16 sectors
>>>> per track. You may need to put it on a disk whose geometry is 16spt. Maybe
>>>> that is why? Venix should support both the 350 and 380.
>>> That doesn't explain it, because all hard drives on the Pro by definition
>>> have 16 sectors per track.
>> Venix runs fine on my 380. In fact, it's the only OS installed on it. It has
>> the stock hard disk, though I'd like to convert to solid state, so I've been
>> reading this thread with interest.
> Interesting.  I wonder if it has to do with the peripherals I have installed.  I should try it again with the PC3XC and CNA pulled out.
> What is your configuration?  Do you have EBO?  Memory size?  Option cards?

Listening to these conversations make me really wish I had not
given my 2 PRO's away.


More information about the cctech mailing list