[Coco] So is this a G board?

[Mark Marlette]

The CART~ signal is used on the sIDE ONLY for the ROMs and follows the Tandy standard.

If SW1 is down, Q is tied to CART~, for the ROM to be detected and initialized via the IRQ vector.

So if this is what the mod is doing, then I agree with Mark, it will have no effect as this would only be invoked *IF* SW1 is down, which is NOT the normal case and only used in the DOWN position for game pak emulation of the FLASH bank ROMs.


Regards,

Mark
http://www.cloud9tech.com


________________________________
 From: Mark McDougall <msmcdoug at iinet.net.au>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
Sent: Friday, June 28, 2013 8:02 AM
Subject: Re: [Coco] So is this a G board?
 

On 28/06/2013 10:39 PM, Retro Canada wrote:

> found a game that is not runnig: keys of the wizard. could it be related
> to the pia mod? could the pia mod be the culprit for superide hang?

The mod should be benign. Normally the input to the PIA (CB1) is the CART# 
signal generated by the Coco; they've cut that and re-wired the input to 
something else... can't see how that would affect the SuperIDE, unless they 
cut the CART# signal TO the connector!?!

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"

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