ACC Utilities Reference Guide

TTGEN - ZCOM System Table Generator
Creating the TTGEN Configuration File
Chapter 2 49
tsize:t0:t1:t2:t3 t0 is the size of 10ms timer table in bytes,
(8-256000, multiple of 8)
t1 is the size of 100ms timer table in bytes,
(8-256000, multiple of 8)
t3 is the size of 10s timer table in bytes
(8-256000, multiple of 8)
t2 is the size of 1s timer table in bytes,
(8-256000, multiple of 8)
These parameters represent the number internal timer resources in the
ACC card. Each timer occupies 8 bytes, with an 8 bytes header for group
of timers. t0, t1, and t3 all default to 4108 bytes (1026 timers). The t3
default value is ACC card type dependent.
The timer entries are required for normal operation of the protocols. If
there are too few timers, unexpected protocol operation may occur.
datadelay data transfer delay (0-100 units of milliseconds)
The driver and ACC firmware transfer data using a protocol capable of
transferring multiple messages in each direction in a single transaction.
Each such transaction requires only a single interrupt to the driver. A
small delay in the data transfer protocol ensures that the protocol runs
efficiently, transferring several messages per transaction when they are
available. Too small a delay may result in unnecessary system CPU
utilization. A larger delay will increase the latency of message transfers
to and from the ACC interface. The default value of 5 milliseconds has
been chosen after careful performance measurements by
Hewlett-Packard. The default value is strongly recommended.
tracesize size of firmware trace buffer in bytes (0-16M)
The Z7340A 8-channel PCI ACC has the ability to capture ACC internal
events in a trace buffer in the internal memory of the ACC card. The size
of this trace buffer can be increased to enable more events to be
captured. Each internal event occupies 16 bytes. A value of 0 prevents
firmware tracing from being enabled, and will allow the memory to used
for other ACC resources. The default value of this parameter is 524,288
bytes.