[Coco] Detecting carts

[camillus Blockx]

I would patch the midi pack eprom (rom) at the very end with two known
bytes, let's say "G""P" and change reset or start up vector to point to a
small routine, that check for this two bytes, and print "No card
availlable" by lack of it and then jump into never ending loop.
If card is present then clear screen and jump to regular address into code.
Probably basic rom or firmware midipack. This only work if you have enough
space in GMD to put the patch routine in.

just an idea. succes

gba

On Wed, Jul 4, 2012 at 11:00 AM, Bill Pierce <ooogalapasooo at aol.com> wrote:

>
> Hi guys,
>  Anyone know of an easy way in "C" (or M/L sub) to detect the presence of
> certain catridges?
> Here is what I'm trying to do.
> I need to be able to detect the presence of the Gleneside Midi Pak (100%
> Speech Systems Comp) .
> My problem is, if I run Midi software and and this cart is accessed but
> not present, on exit the program hangs due to trying to close the port.
> The cart is being accessed directly, not through a driver.
> If this could be done, I need a way to detect:
>
> Gleneside Midi Pak (or Speech Systems Midi Pak)
> Colorchestra Midi Pak
> Speech Systems Stereo Pak
> RS Speech & Sound pak.
> And possibly the Intercomp Sound Midi pak.
>
> I'm running Nitros9, Coco 3, Disto 1 Meg, Grey Multi Pak Interface (pal
> fixed) with Drivewire4
>
> Also, what is the easiest way to detect if Drivewire is is installed? (Os9
> side)
>
> Thanks
>
>
> Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Bill Pierce
> ooogalapasooo at aol.com
>
>
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>