[Info-vax] Trying to boot a MicroVAX II with VMS 7.3

[Robert Jarratt]

>
> I can confirm that VMS 7.3 will boot succesfully on a SIMH 3.8-1 
> VAX-11/780 with 8MB of memory. The SIMH MicroVAX 3900 insists on having a 
> minimum of 16MB (probably because its physical counterpart does).
>
> So, memory itself should not be a problem for booting VMS 7.3. Could still 
> be something in the MicroVAX II architecture, or a hardware malfunction.
>
> My system disk has a SYSGEN parameter set created by
>
> SYSBOOT> USE DEFAULT
> SYSBOOT> SET VAXCLUSTER 0
> SYSBOOT> SET STARTUP_P1 "MIN"
> SYSBOOT> CONTINUE
>
> The parameter is called PHYSICALPAGES (no underscore)
>
> /Wilm

In the conversational boot I tried
    SET PHYSICALPAGES 16384
    SET STARTUP_P1 "MIN"
But it went back to the "%SYSBOOT-F-PFN allocation overwrites CI ucode." 
error. So then I tried:
    SET PHYSICALPAGES 16384
    SET STARTUP_P1 "MIN"
    SET NPAGEDYN 16384
    SET BALSETCNT 4
    SET VIRTUALPAGECNT 512
The latter three are the minimum values for the parameters mentioned in the 
solution for the PFN error. This time I got "%SYSBOOT-F-Not enough non-paged 
pool to map TTDRIVER.EXE". I think that NPAGEDYN should be less than 8MB but 
SYSBOOT insists that the minimum value permitted is 16384.

I think there is a chance that there is a hardware problem but is it likely 
to manifest itself like this?

Regards

Rob