PAK-II Datasheet, PDF (14/28 Pages) List of Unclassifed Manufacturers – 310 Ivy Glen Court

approximately 55uS in the worst case.
CHS
Negates the X register.
COMMCK
This command causes the Pak II to issue a
$2A response. You can use this to check
communications. The Pak II will always
respond with $28 plus the version number.
COS/ACOS
Sets the X register to the cosine/arccosine
of X (in radians).
DIGIT
The DIGIT command accepts a single byte
as an argument and returns a single byte. If
the input byte is a zero, DIGIT returns an
ASCII +, and ASCII – or a blank character
depending on if the X register is positive,
negative, or zero. You can use this as a
SGN function, but it is mostly useful when
writing numbers in readable form.
If the input number is less than $7F, DIGIT
returns the ASCII digit from the X register
that you ask for. For example, if X contains
13.141 and you issue a DIGIT 1 command,
the return will be '3'. DIGIT 2 will return