[Coco] BASIC and Disk BASIC version numbers

[Bruce Calkins]

> tim lindner, Wrote,
> I am guessing that a CoCo 2 with version 1.3 of the ROM comes with a
> SN74LS785 SAM and not a SN74LS783/MC6883 SAM.

Correct, It mostly had to do with the refresh rates for 4 by XXk RAM Chips.

> So if the jumper is in place you have: 16K x 4 dynamic RAM.
> If the jumper is clear you have: 64K x 1 dynamic RAM.

Vise-versa, you added the jumper for 64k.