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Comments
C and QuickBASIC
Programs
270 HP E1340A Register-Based Programming
1. Before running this program, type ' GET "SUBS",500 '. This adds
the subprograms to program "FASTFREQ" starting at line 500.
2. Fast frequency changes are enabled by setting the 'Fast frequency
change' mode. The frequency changes after the fourth frequency byte
is written to the Frequency Register (1 or 2).
3. Once the mode is set, frequencies (bytes) are written to the
Frequency Register without writing the command opcode (line 1139
is commented '!'), and without checking for the 'done' condition
(line 1189 is commented'!'). The frequency will continue to be
changed after every four bytes until the mode is changed. Amplitude
correction is not available with this mode.
4. This mode uses the 4k RAM size. The Frequency Register and RAM
size bits (Table C-2) are ignored.
The C program FASTFREQ.C is in directory "CPROG", and the
QuickBASIC program FASTFREQ.BAS is in directory "QBPROG" on the
example program disk HP P/N E1340-10036.
Appendix C
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