Sperry XT 3070-03 Questions

[achim2211]

Hi guys,

I am a proud owner of a Sperry XT 3070-03. It's in great condition but there are some questions where you eventually can help.

1. Memory RAM card
There are 2 RAM cards installed, first is fully loaded, 2nd is just equipped with 128kB soldered.
If counting them memory: 128 on mother board, 1st expansion:128 soldered + 384 on socket, 2nd expansion: 128 soldered
Does this make sense? I count 768 which doesn't make sense. Is the 2nd card needed at all?
Does anyone has the dip switches desription to select the starting address?

2. CGA - there is the advanced 2board CGA isntalled
When I connect a standard CGA monitor I don't get a propper picture. There is a message bur I can't read it.
I also connected a NEC MultiSync1 but also no clear picture.
Are there any settings?

3. Manual
I've found the link to the Leading Edge MB. However doe anyone has the original manuals and provide a scan on the essential dip switches?

Thanks,
Achim

 

[Trixter]

This is just a guess, but the enhanced CGA board might be putting out a 400-line signal instead of a 200-line. A monitor built for that (like an Olivetti M24 or AT&T 6300 monitor) might produce a displayable picture.