On Dec 8, 22:06, Christopher McNabb wrote:
> Does anyone have a list of the IOT instructions (and what they do) for
> the TD8E simple dectape controller?
67x1 SDSS Simple DECtape skip on Single Line flag
skip if Single Line flag is set
67x2 SDST Simple DECtape Skip on Time Error flag
skip if Time Error flag is set
67x3 SDSQ Simple DECtape Skip on Quad Line flag
skip if Quad Line flag is set
67x4 SDLC Simple DECtape Load Command Register
load Command Register from AC
clear Time Error
start UTS delay if UNIT, DIRN, or STOP/GO flip-flops
are changed
67x5 SDLD Simple DECtape Load Data Register
load Data Register from AC -- do not clear AC
clear Single Line and Quad Line flags
67x6 SDRC Simple DECtape Read Command Register
load contents of Command Register, Mark Track Register,
and Status bits into AC
clear Single Line and Quad Line flags
67x7 SDRD Simple DECtape Read Data Register
load contents of Data Register into AC
clear Single Line and Quad Line flags
Unit numbers:
Unit 0,1 use opcodes 677x
Unit 2,3 use opcodes 676x
Unit 4,5 use opcodes 675x
Unit 6,7 use opcodes 674x
This is on page 8-4 of the PDP-8 Maintenance Manual, Vol.3, which you can
get from David Gesswein's excellent website.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Mon Dec 09 2002 - 02:16:00 GMT