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Instruction Set 9-117
mtdcr
Move To Device Control Register
mtdcr
Move To Device Control Register
DCRN ← DCRF
5:9
|| DCRF
0:4
(DCR(DCRN)) ← (RS)
The contents of register RS are placed into the DCR specified by the DCRF field.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
• DCR(DCRN)
Invalid Instruction Forms
• Reserved fields
• Invalid DCRF values
Programming Note
Execution of this instruction is privileged.
The DCR number (DCRN) specified in the assembler language coding of mtdcr refers to a DCR
number. The assembler handles the unusual register number encoding to generate the DCRF field.
Architecture Note
This instruction is implementation-specific and may not be portable to other implementations.
mtdcr DCRN, RS
31 RS DCRF 451
0 6 11 21 31