773
Basic I/O Unit Instructions Section 3-22
Description SDEC(078) regards the data specified by S as 4-digit hexadecimal data, con-
verts the digits specified in S by Di (first digit and number of digits) to 7-seg-
ment data and outputs the results to D in the bits specified in Di.
Flags
Precautions If more than one digit is specified for conversion in Di, digits are converted in
order toward the most-significant digit. Digit 0 is the next digit after digit 3.
Results are stored in D in order from the specified portion toward higher-
address words. If just one of the bytes in a destination word receives con-
verted data, the other byte is left unchanged.
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area S Di D
Di
Number of digits
Rightmost 8 bits (0)
7-segment
First digit to convert
Name Label Operation
Error Flag ER ON if settings in Di are not within the specified ranges.
OFF in all other cases.
To Next Page
Loading...
