[Coco] Including an SSC

[Bill Pierce]

Ed,
Here's a link to the copy I have. I think there's a couple of missing carts, but it covers a lot of them.
https://dl.dropboxusercontent.com/u/23059963/Stuff/Coco%20Registered%20Port%20Addresses%20and%20Devices.doc


Bill Pierce
"Today is a good day... I woke up" - Ritchie Havens
 

My Music from the Tandy/Radio Shack Color Computer 2 & 3 
https://sites.google.com/site/dabarnstudio/
Co-Webmaster of The TRS-80 Color Computer Archive
http://www.colorcomputerarchive.com/
Co-Contributor, Co-Editor for CocoPedia
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E-Mail: ooogalapasooo at aol.com




-----Original Message-----
From: Zippster <zippster278 at gmail.com>
To: Bill Pierce <ooogalapasooo at aol.com>; CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, Oct 14, 2014 9:10 pm
Subject: Re: [Coco] Including an SSC




I’d like a copy of that document detailing CoCo cart buss addresses if 
anyone happens to know where it is. 
 
- Ed 
 
 
On Oct 14, 2014, at 7:59 PM, Bill Pierce via Coco <coco at maltedmedia.com> wrote: 
 
> Tony, 
> No devices whether on a y-cable or in the MPI can opperate on the same buss  
addresses. The MPI does not block the busses or it would be useless. You would  
not be able to use a floppy controller, hd controller and rs232 pak at the same  
time if that were true. 
> The whole point is that VERY few Coco program/extension paks with I/O are  
mapped to the same buss addresses. This is why I can have my FD-502, B&B HD  
controller, Orch90, and MIDI pak all online at once. It would work on a Y cable  
as well, as my Orch90 has the pin taped so the rom won't try to start. 
> Care has been taken through the years to try and NOT clash buss addresses. I  
only know of a few carts that cause problems in this area and I don't own any of  
them. 
> The only real problems with a y-cable if no buffers for protection, weak power  
supply from the cartport to supply multiple devices and roms. The MPI solved  
most of this (somewhat) and only started the rom on the selected cart, buffered  
the busses, and provided better power. 
> BTW... there's a document floating around that has "most" known bus addresses  
for most of the Coco carts.... somewhere. I have a copy, but I'm not sure if  
it's up to date. 
>  
>  
> Bill Pierce 
> "Today is a good day... I woke up" - Ritchie Havens 
> ? 
>  
> My Music from the Tandy/Radio Shack Color Computer 2 & 3  
> https://sites.google.com/site/dabarnstudio/ 
> Co-Webmaster of The TRS-80 Color Computer Archive 
> http://www.colorcomputerarchive.com/ 
> Co-Contributor, Co-Editor for CocoPedia 
> http://www.cocopedia.com/wiki/index.php/Main_Page 
> E-Mail: ooogalapasooo at aol.com 
>  
>  
>  
>  
> -----Original Message----- 
> From: Tony Cappellini <cappy2112 at gmail.com> 
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
> Cc: etrocanada76 <etrocanada76 at gmail.com> 
> Sent: Tue, Oct 14, 2014 7:28 pm 
> Subject: Re: [Coco] Including an SSC 
>  
>  
>  
>  
> Message: 7  
> Date: Tue, 14 Oct 2014 15:12:46 -0400  
> From: "Luis Antoniosi (CoCoDemus)" <retrocanada76 at gmail.com>  
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>  
> Subject: Re: [Coco] Including an SSC  
> Message-ID:  
>        <CAFgJrh_e7TiL=-NATE32r8e-2gp1VBuENrpTShcZEwGSe_v9HA at mail.gmail.com>  
 
> Content-Type: text/plain; charset=UTF-8  
>  
> >>it only works with carts with no ROM. like SSC, cocomax interface,  
> >>wordpaks, etc. You can only have one ROM.  
>  
> >>The glenside IDE has no ROM so it could be attached with the FDC. Also  
it  
> >>comes with 2 slots on it.  
>  
> Hi Luis,  
>  
> I don't see what ROMs have to do with this issue.  
> Multiple devices on the same bus cannot use the bus at the same time  
> unless they have appropriate decoding & buffering (This is why a multipack  
> interface exists).  
> Even if there is no software accessing all devices on the bus at the same  
> time,  
> one device may be trying to drive a signal low, while another device is  
> trying to  
> drive it high.  
> Would you please explain your statement about ROMS?  
>  
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