What was a Terminal Concentration Device in DEC's products?
paulkoning at comcast.net
Sat Jan 29 16:12:41 CST 2022
> On Jan 29, 2022, at 3:58 PM, Noel Chiappa via cctalk <cctalk at classiccmp.org> wrote:
>> From: Paul Koning
>> DH-11 is unusual in that it has DMA in both directions
> McNamara's DH11? (I don't know of another DECdevice of that name.) Per:
> it's DMA on output only; the input side has a FIFO that has to be emptied by the CPU.
Oh. That's amazing, all these years I thought it had DMA both ways. Clearly not. I wonder how I got that misunderstanding.
More information about the cctech