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BLANK
Blank
The BLANK command blanks trace A, B, or C and stops the sweep; the trace is not updated.
Trace A and C are discussed below. For detailed information about trace B, see B4 in this section.
V I D E O _
DETECTOR
l
When BLANK TRA is executed, the contents of trace A are stored in display memory addresses 1 through 1023.
Address 0 is reserved for the instruction word 1072'. Similarly, when BLANK TRB is executed, trace C contents
are stored in addresses 3073 through 4095. Again, address 3072 is reserved for instruction word 1072'. There-
fore, any information stored in address P, is lost when BLANK TRA is executed. Likewise, the contents of address
3072 are lost when BLANK TRC is executed.
If you have used address !il or 3072 for a graphics program or label, you may wish to save their contents before
executing BLANK.
OUTPUT 718; "BLANK TRA;"
For additional information, refer to Appendix A. (See A4, B4, KSk, and TRSTAT)
1072 is a machine instruction word that sets addresses
l
and then skips to the next page memory.
40
Programming
BLANK
ANALOG
DISPLAY
TO
MEMORY
ADDRESSES
C O N V E R T E H WHITE/
l - 1 0 0 1
STORE
1 0 2 5 - 2 0 2 5
1
through 1023 (BLANK TRA) or 3073 through 4095 (BLANK TRC) to zero,
TO
- w - c l - -
CRT
DISPLAY
OR
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