> On Feb 22, 2017, at 2:18 PM, allison <ajp...@verizon.net> wrote:
>
>> ...
> The AAV11-C is an analog output board and I know of no code for it as it was
> usually part of a user application.
> Same for its complementing Analog input board ADV-11 M8000 and in systemss
> ussually appered with M6010
> digital output card, IBV-11 M7954 instrument bus interface. See MINC-11
> systems for more.
At my alma mater, the physics department had an 11/20 with AD01 and AA11 analog
I/O, as well as DR11-A digital I/O and KW11-P programmable clock. Originally
that system ran DOS (8 kW, RC-11 system disk). One of the professors had
extended DEC BASIC to drive those peripherals. For an honors project, I did
the same and more with RT BASIC. Among other things, you could write interrupt
handlers in BASIC to respond to digital inputs or clock signals.
I also wrote a crude CRT display program by sending X/Y pairs to the AD01 and
then to the X and Y inputs of a scope. Refresh memory was on the RC11, using
bus address increment to DMA directly from disk to AD01.
paul
