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Extended Basic Plus - Sebasoft 1987


kl99

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I got a wonderful wedding gift from Ermanno from Italy - Astharot on atariage. It is an Extended Basic Plus I didn't know existed. It is from Sebasoft from 1987.

There was no single reference to it in the whole The Cyc (cadd99.com).

 

Now after honeymoons I finally had some time to examine it, at least by opening it.

 

post-27826-0-31108400-1509910432_thumb.jpg

 

post-27826-0-99216700-1509911124_thumb.jpg

 

post-27826-0-76231100-1509911212_thumb.jpg

 

post-27826-0-28110400-1509911299_thumb.jpg

post-27826-0-36378400-1509911323_thumb.jpg

post-27826-0-70365200-1509911397_thumb.jpg

 

Is this some unique PCB layout?

It seems it shows ROM and 2 GROM to the TI, but fakes the GROMS to the TI using standard Eproms and some logic.

The board uses TMS27128 for some reason, which means 16k per chip if I am right.

I made lots more pictures of the PCB parts if anyone is interested.

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