DEC Professional 380, TMS and EBO questions

Pontus Pihlgren pontus at Update.UU.SE
Tue Apr 12 08:57:39 CDT 2016

On Tue, Apr 12, 2016 at 09:32:43AM -0400, Paul Koning wrote:
> No.  You can find all this in the Pro300 series technical manual, on 
> Bitsavers.  The base video module is one plane, so black/white only.  
> The EBO module adds two more planes.

One technical manual(EK-PC350-TM) on bitsavers is for the 350 only. 
Which states that you can sacrifice resolution for more shades.

The other (EK-PC300-V1 and -V2) covers both the 350 and 380 but is less 
than crystal clear when it comes to the Bit Map Video Controller on the 

I'd be surprised if the 380 behaves differently, but I wanted to know if 
anyone knew for certain. I read somewhere that few programs used the 
lower resolution so in practice it might not matter so much.


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