Re: KA48 / VAXstation VLC cache question

[Charles Dickman <chd%chdickman.com@localhost>]

Isn't the KA48 more like the KA46?

On Thu, Aug 20, 2015 at 5:42 AM, Felix Deichmann <m4j0rd0m0%gmail.com@localhost> wrote:
> 2015-08-20 10:07 GMT+02:00 John Klos <john%ziaspace.com@localhost>:
>> That code causes a panic, like other things I've tried, on the first write
>> of 1 to BEHR (Bank Enable/Hit Miss Register). Reading that location
>> (0x20150800) causes a panic, too. This is after confirming that the CCR
>> changes from 16 (decimal) to 17, meaning it is in diagnostic mode. I suppose
>> that the cache isn't memory mapped in the VLC.
>
> It seems to work in my KA660 at least. Sold my last VLC over 10 years
> ago unfortunately.
> Looking at ka48.h and a "From OpenVMS $IO440DEF & $KA440DEF" comment
> introduced with rev. 1.2, I would also think that the implied
> relationship there between KA440 (VS3100 m10/20) and KA48 (VLC) and
> PARCTL stuff is wrong...
> Don't know where to get infos now. Ultrix sources...? Reverse-engineer
> from VMS? Or is there a VLC Technical Manual? The VLC documentation
> kit is EK-VAXVL-DK, but will it help? Maybe ask on comp.sys.dec for
> docs.