# Customizing PxPlus

System Parameters |

System parameters can be used at start-up to define system operations under PxPlus, including system settings, default operating modes, and environmental emulation modes. Each parameter consists of a two-character code enclosed in single quotes. Some are Boolean switches (0 or negative sign to indicate Off, 1 or "no sign" to indicate On), and some require specific values in order to be set.

System parameters are usually set once at the beginning of an application; e.g. in a lead program following the START_UP procedure. They can also be specified directly on the PxPlus Command line; in which case, they do not require single quotes and must be prefixed with a dash or slash. See Launching PxPlus.

Use the SET_PARAM directive to set/reset parameters within your PxPlus applications. The *UCP utility can also be used to display and change parameters in the system.

Use the PRM system variable to return a string of all current system parameters.

Use the PRM( ) function to return the settings for specific parameters.

Example:

> PRINT PRM
> -'3D',-'AD',-'AH','AI'=10,-'B0','BF'=10,-'BT',-'BX','BY'=1970,-'CD','CS',
> 'CT'=0,'CU'=36,-'D0',-'DC','DF'=0,'DL'=0,'DP'=46,'DT'=0,'DW'=0,-'EG','EL'=0,
> -'EO',-'ES',-'EX',-'F4','FB'=5,-'FC','FF'=0,-'FI','FO'=0,-'FU',-'FL','FP',
> 'FS'=138,-'FT',-'FX',-'F,',-'I0',-'I2','IC',-'IM','IR','IS'=5,-'IZ',-'KR',
> 'LB'=4,-'LC',-'LD',-'LE','LS'=1,-'LU',-'LZ','MB'=0,-'MC','MF'=50,-'MP','NE',
> -'NI',-'NK',-'NL',-'NN',-'NR',-'OC','OL'=25,'OM',-'OP','OR','OW'=0,'PC'=0,
> 'PD'=2,-'PO',-'PU','PW'=36,-'PZ','QF'=1,'Q_'=2,'Q^'=2,-'QS',-'QT',-'RI',
> 'RN'=1,'RP',-'RR',-'RS',-'SC',-'SD',-'SF',-'SK','SL'=32,-'SP',-'SR','SV'=1,
> 'SZ'=32000,-'TB','TC'=0,'TH'=44,-'TL',-'TN',-'TT',-'TU',-'TX','VP'=48,'VR'=0,
> 'VW'=0,'WB','WD'=10000,-'WF','WH'=0,'WI'=1000,-'WK','WT'=2,-'XC',-'XF',-'XI',
> -'XT',-'ZP',-'DD','!B'=3,'!U'=0,-'1U'
> PRINT PRM('LC')
> 0

## See Also

System Parameters