S4683; V4683; G4683 - VeriFone MX800 series Programmer's Manual

D D
EVICE RIVERS
ECR Environment Variables
NOTE
118
M X 800 S P
ERIES ROGRAMMERS
COM4 can also be available if the M
is present with a physical serial connector. This module may be available as a
future enhancement. Whenever flow control is enabled via the
svcSetOpenBlock() function, then RTS is also asserted and held, regardless if
"R" is specified in the setting. See
Some valid settings are:
2 1152008N1 this string is 11 bytes in length and Auto Enable and RTS are not set.
3 2400 7E1A this string is 12 bytes in length and Auto Enable (flow control) is
enabled. RTS is held asserted whenever flow control is enabled.
1 9600 7E1 R this string is 13 bytes in length and Auto Enable is not set and RTS is
set. There is a pad byte for the "A".

S4683

Indicates the Lane Identification number. This value is set in system mode and the
legal values are any 8 byte numeric value.

V4683

Indicates the VISA communication parameters. It is 2 bytes with each byte set to a
numeric value between 0 and 9. The first byte indicates the retry count and the
second byte indicates the timeout value in seconds. The retry count specifies how
many times a packet should be retransmitted after the initial packet transmission
was not acknowledged (ACK'ed). The timeout value indicates how much time
should lapse between retransmissions. Setting the retry count to 0 or the timeout
value to 0 will cause no retransmissions.
The default value is: 39 (3 retries and 9-second timeout)
If the application does not want the default value, then it must be set either in
system mode, downloading its value or setting this environment variable to the
desired value following INI parser rules.

G4683

Set via a System Mode ECR download. If a Full download is selected then G4683
is set to FULL. If a Partial download is selected then G4683 is set to PART. This
variable is not read by the operating system and exists so that the application can
determine the download mode. When the download starts either by System Mode
ECR/Serial download or a call to the ecrDownload() function, the G4683
variable is read. If its value is set to FULL, then all files and sub-directories will be
deleted.
G
UIDE
x
800 series terminal custom optional module
svcSetOpenBlock()
for further description.