6530 Programmer's Guide

Conversational Mode Operation
6530 Programmer’s Guide 2-35
where:
pn is an ASCII digit from 0 through 6 that specifies the parameter(s)
to be set
str = omitted string (zero length)
str2 = "PC6530" for PC6530
str3 = "DOS5.0" for MS-DOS version 5.0
= "DOS4.0" for MS-DOS version 4.0
= "DOS3.3" for MS-DOS version 3.3
The MS-DOS string returned for str3 is determined by the result of a
call to MS-DOS INT 21 Function 30H.
RTM Support The 6530 supports Response Time Measurement (RTM): collecting
response time statistics, accepting commands to set up RTM collection
parameters, and accepting commands that solicit a response containing
the RTM data collected.
Response Time Measurement is implemented by using a configurable
number of counters (buckets) which count the number of times that
measured response intervals fall within configurable time range
boundaries (bucket boundaries) associated with each counter.
The response interval is the measured length of time between the start and
stop timing events which are configurable as either:
the press of a function key (start) and the receipt of the first resulting
character from the host (stop),
or
the press of a function key (start) and the receipt of the keyboard
unlock command (stop).
The time measurement is reported to the nearest 100 milliseconds and is
accurate within 10 percent or less.
Bucket boundaries consist of a lower boundary and upper boundary,
specified in centiseconds. The count held in the bucket is incremented by
one when a response interval measurement falls within the bucket
boundaries.
The configured number of buckets will contiguously cover the time range
from 0 to infinity. Buckets are actually defined by specifying one or more
partitions in that range, rather than explicitly specifying the start and end
value for each bucket.