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Individual Instruction Descriptions
4-158
4.14.63 SFLAG Set Memory Flag
Syntax
[label] name dest
Clock,
clk
Word,
w
With RPT,
clk
Class
SFLAG {
flagadrs
} 1 1 N/R 8a
Execution memory flag bit at {
flagadrs
} data memory location ⇐ 1
PC ⇐ PC + 1
Flags Affected None
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SFLAG
{flagadrs}
1 0 0 1 1 1 0 1 0 1
flagadrs
Description Set flag at addressed memory location. {
flagadrs
} includes two groups of
memory flag adrresses: global flags, which are the first 64 words in RAM; and
relative flags, which are 64 locations relative to the page register (R6). Flag
address {
flagadrs
} only accesses the 17
th
bit.
See Also RFLAG, STAG, RTAG
Example 4.14.63.1 SFLAG *R6+0x12
Sets the flag bit of the RAM word addressed by R6 plus 0x0002. Note that R6 contains a byte address
and 0x0002 is interpreted as a word offset.