Di Disable Interrupts - Samsung S3C84I8 User Manual

S3C84I8/F84I8/C84I9/F84I9
DI
— Disable Interrupts
DI
SYM (0) ← 0
Operation:
Bit zero of the system mode control register, SYM.0, is cleared to "0", globally disabling all
interrupt processing. Interrupt requests will continue to set their respective interrupt pending bits,
but the CPU will not service them while interrupt processing is disabled.
No flags are affected.
Flags:
Format:
opc
Given: SYM = 01H:
Example:
DI
If the value of the SYM register is 01H, the statement "DI" leaves the new value 00H in the
register and clears SYM.0 to "0", disabling interrupt processing.
Bytes Cycles Opcode
1 4
INSTRUCTION SET
(Hex)
8F
6-37