[Coco] upgrading a CoCo 2 to ECB

[Robert Gault]

doctorx0079 wrote:
> Robert Gault wrote:
> 
> <snip>
> 
>>You can also obtain an image
>>of the Extended Basic ROM from the Internet and burn an eprom for the
>>Coco2 if the Extended ROM is missing. However, you may have to ask if
>>someone will do that for you.
>>
> 
> 
> This idea intrigues me. I can switch the CB ROM with an ECB ROM? Has anyone
> done this? Can you give me some info on how to do it? It would be nice to be
> able to use my floppy drive with this CoCo. Then I could just get a floppy
> drive for my PC, make CoCo floppies on my PC and run them on the CoCo. I
> read on the internet that there were 16K CoCo's with ECB so I probably don't
> need more RAM.
> 
> 

  Open up the Coco2. You should see two sockets or at least two in-line 
solder points on the board. One is for the Basic ROM and the second is 
for the Extended Basic ROM.
  You don't replace the Basic ROM but add the new Extended Basic ROM. 
This is the normal upgrade procedure which Tandy would perform.

  I've not had to do this because my Coco1 came with both Basic and 
Extended Basic. I would not be surprised, however, if there are readers 
on this list who have installed the Extended Basic ROM chip.