[Coco] Computerdoc - Coco Hardware Development Adapter

[Kandur]

Hi Kip,
Here is my blog's Super Board address:
http://qdv.pw/coco/?p=201
From there you can download the device descriptors
and other source files, the parts list is there too.
Unfortunately I have no schematic for this board.
I was hoping that Kevin Diggs, having the same board, may have one.
So far using an ohm meter found out that the 1488 RS-232 driver's 
-V pin is connected to the edge connector's #1 pin, 
(-5V on Coco-1, N/C on Coco-3). In the Coco-3 I'd like to connnect the 
junction of D3&D4 in the power supply, to the edge connector's  pin 1,
via a resistor, to supply -5V to the Super Board. 
I only have a Coco-3,  any caveats about trying to do that?

BTW here is the board's memory map:
PIA equ $FF64 address of baud rate pia
PIA1 equ $FF60 address of 2nd rate port
PORT1 equ $FF68 address of acia #1
PORT2 equ $FF6C address of acia #2
PORT3 equ $FF78 address of acia #3
PORT4 equ $FF7C address of acia #4
CCPIA equ $FF22 address of coco firq pia
PIACR equ $FF23

One more finding, the two BR-2325 button cells are 
connected parallel. These seem to power only the HD146818 
Real Time Clock chip, does it need more then one BR-2325?

Kandur

Monday, October 6, 2014, 12:16:57 AM, you wrote:
> Hi Kandur!
> Thanks a bunch.  I'll be waiting for your email.
> Could you resend a link to your blog?  I can't find it in my email database
> as of yet.  Thanks a bunch.  
> Yes, I think I do remember seeing some 6850 driver descriptors in the list
> of your archive last time I read it.  I want to look at them again.  I would
> also like to see some schematics if available.  I'm working on what will one
> day be my biggest project yet.  I'm nowhere near ready to announce it yet.
> It's in the beginning stages of design at this point.  I'd like to get a
> copy of that software so I can begin to collect the drivers and driver
> descriptors I will need.  You can send it directly to my email address
> below.  Thanks a bunch!  Take care my friend.

> Kip Koon