[Coco] [Color Computer] CoCo keyboard

[jdaggett at gate.net]

Robert

Be aware that Motorola last year totally discontinued the 
MC68HC11E2 processor. While these can be fou nd in surplus on 
EBAY and other sources, they will be dryig up. The E2 can 
besimulated with an E1 and an external ROM.

Another approach is that there are some open source code to do 
hardware in FPGA to intrerface to a PS2 mouse and keyboard. For 
OS9 it would then be SCF driver/descriptor addition to handle the 
serial input from the PS2 style keyboard and mouse.

james

On 16 Jul 2004 at 9:26, Robert Emery wrote:

To:             	ColorComputer at yahoogroups.com
From:           	Robert Emery <theother_bob at yahoo.com>
Date sent:      	Fri, 16 Jul 2004 09:26:35 -0700 (PDT)
Subject:        	Re: [Coco] [Color Computer] CoCo keyboard
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> --- 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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