[Coco] DMA access for cartridges?

[Tormod Volden]

On Thu, May 7, 2015 at 10:54 AM, Kip Koon wrote:
> Hi John,
> The only 2 signals from the 68B09E/63C09E that are not connected to the CoCo Slot Expansion bus are the IRQ and FIRQ signals.  All other signals from the cpu are present, so if you can implement DMA without those two interrupt signals, then I would say go for it.  Otherwise some special interface is needed to utilize those 2 interrupt signals.


I think you actually meant the BS and BA outputs, which can be used to
track the bus state. Also AVMA/LIC/TSC/BUSY are not available on the
cartridge connector.

Tormod