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QFLASH prints out the currently selected pre-flash time, measured in arbitrary units of about 1 microsecond. SETFLASH sets up this time. The actual flash is performed automatically prior to a GLANCE or RUN, or on demand using the FLASH command.
This is not available for the RCA chip. For the GEC chip the default pre-flash time is 0 seconds.
QFLASH requires none. SETFLASH requires the pre-flash time. If omitted, it will be prompted for. FLASH requires none since it uses the time previously set up by SETFLASH.
Adam:> SETFLASH 10
SETFLASH does no more than set a microcode variable governing the flash period. It performs no flash. To disable pre-flash give a zero flash time.
If the preset FLASH time is 0. FLASH does nothing.
***For the JKT PREFLASHDEFAULT = 0 is the default, since it is not considered necessary for the GEC2 chip. (There is no preflash available with the RCA2 chip).