View source for Systems Concepts DK-10

The [[Systems Concepts]] DK-10, or 'Datapoint Kludge', is a [[PDP-10]] peripheral to attach up to 16 [[asynchronous serial line]]s. It was used on the [[MIT Artificial Intelligence Laboratory]] [[KA10]] computer running [[Incompatible Timesharing System|ITS]].

=== DATAO bits ===

{{36bit-header}}
| colspan=15 | Unused || IE || colspan=20 | Base address
{{36bit-bitout}}

* IE - Interrupt enable

The base address specifies a region in physical memory holding a word pair for each line.  The first word is the character count, and the second word is a PDP-10 byte pointer with the halves swapped.  When outputting data, the DK-10 will fetch a character according to this information and update the word pair in memory.

=== DATAI bits ===

{{36bit-header}}
| colspan=14 | Unused ||  colspan=4 | Line || colspan=11 | Unused || colspan=7 | Character
{{36bit-bitout}}

The DK-10 has a 16 character wide input FIFO.  DATAI will read from this queue, supplying information about both the character received and from which line.

=== CONI bits ===

{{36bit-header}}
| colspan=14 | Unused ||  colspan=4 | Line || colspan=9 | Unused || OD || I || B || P || N || ID || colspan=3 | PIA
{{36bit-bitout}}

* OD - Output done
* I - State of selected input line
* B - Output line busy
* P - Parity error
* N - Non existing memory
* ID - Input done
* PIA - PI channel assignment

=== CONO bits ===

{{36bit-header}}
| colspan=18 | Unused || Reset || H || colspan=4 | Line || colspan=3 | Speed ||  colspan=3 | Function || P || N || ID || colspan=3 | PIA
{{36bit-bitout}}

* H - Makes function apply to selected line through highest
* P - Clear parity error
* N - Clear non existing memory
* ID - Clear input done
* PIA - PI channel assignment

== External links ==

* [https://github.com/PDP-10/its-vault/blob/master/files/wp/dk-10.12h7 Hardware memo 12: DK-10 Programming]

[[Category: PDP-10 Peripherals]]

{{semi-stub}}