26 Jan
2014
26 Jan
'14
3:27 p.m.
On 01/26/2014 12:49 PM, Tony Duell wrote:
What';s the 6828? I suspect the 6829 would be very
hard to use with
anything other than a 6809 (it.s the MMU for the 6809). Not a common
chip, but I have seen it.
Priority interrupt controller.Outputs a 4-bit vector (8 IRQ responses,
spaced 2 bytes apart) to create an interrupt vector table starting at
FFE8 and very dependent on 6800 timing.
I'm not surprised that it's somewhat obscure.
--Chuck