[Techtoolslist] Ram tests on Robotron with 9010

[John Robertson]

David Shoemaker wrote:

> According to mame there is rom covering the entire memory range from0-FFFF

>

>  

>

>

> ROM Regions:

> ...

>

>  

>

> So the ram / rom address space must be bank switched.  Question is how to do

> that so I can get a good ram test with the fluke?  I can do rom tests just

> fine so the board must default to the rom bank's.

>

>  

>

> Suggestions?

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>  

>

> Thanks,

>

> David

>

> ____

As I recall the Defender Technical Service manual covered the bank 
switching in either the first (early board - 1 24 pin PROM) or second (2 
PROM later boards) editions.

Yup, it's there...page 15 (Video Ram Control)  of manual 16P-3001-301. 
Pretty sure they didn't change that at all (or very much?) for later boards.

John :-#)#

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