[Coco] [Color Computer] CoCo keyboard

[Robert Emery]

--- John <John0457 at hotmail.com> wrote:
> Hi,
> 
> I was wondering if someone could send me a schematic for the CoCo.

Which model/revision?
 
> I would like to know how the CoCo ROM scans the keyboard... 
> Has anyone disassembled the CoCo ROM ?

Check out http://www.cocounravelled.com/unravelled.shtml
Start with the first book.

There are also complete plans on RTSI for an AT keyboard
adapter... should be easy to mod to PS2 adapter.

> I would like to use a Compact Flash module for the CoCo.

You can...
http://www.cloud9tech.com

 
> I assume the CoCo has internal drivers for a floppy disk.

The floppy controller catridge contains the Disk Basic rom,
which adds disk commands to the original Basic rom(s).

> The SWTPC uses the WD1771, but I think the CoCo uses a 
> Motorola chip.

WD1773, at least one older FDC used the '1771 and those can
apparently be hacked to do HD.

> How many bytes / sector does the CoCo use ? OS9 uses 512 byte 
> sectors I beleive which is compatible in size with the Compact 
> Flash. Flex on the other hand uses 256 byte sectors which is a bit 
> more difficult to simulate on a compact flash.

256


> Thanks
> 
> John. 

np,
Bob


		
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