[Coco] Drivewire 3 issues
boisy at tee-boy.com
Thu Apr 2 14:17:30 EDT 2009
Did this also fix your keyboard issue in NitrOS-9?
Boisy G. Pitre
Email: boisy at tee-boy.com
On Apr 2, 2009, at 1:05 PM, Christian Lesage wrote:
> Boisy Pitre wrote:
>> On Apr 2, 2009, at 12:32 PM, Christian Lesage wrote:
>>> I don't use a disk controller. I removed the ROM from a "Shanghai"
>>> ROM Pak and replaced it with a 27C256. Since A14 (pin 27) is held
>>> high in the ROM Pak, I offset the code by $4000 (i.e. it starts at
>>> $4000 instead of $0000). So out of 32kb, only 16kb are usable. I
>>> now realize that there's probably a mechanism that allows the
>>> CoCo to check the ROM Pak size (8kb or 16kb). That's probably
>>> where my problems come from. The CoCo sees a 16kb ROM Pak while it
>>> should be an 8kb one, as if using a disk controller. So I guess I
>>> have to modify the ROM Pak, but how? It's been so long since I
>>> last played with CoCo hardware.
>> I think your problem is that you haven't cut pin 8 on the
>> cartridge, and this is causing the program to auto start. Try
>> cutting pin 8 on the cartridge and see if that helps.
> Problem solved!
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