User guide

11.3. THE MC LANGUAGE 197

RK AK VK GK MK LK DK DXK DXsK DXsBK

Move the zero extended 16-bit val ue speciﬁed by the second operand into the ﬁrst.

LEA RA RV RG RM RL RD RDX RDXs RDXsB

Load the register speciﬁed by the ﬁrst operand with t he absolute address of the

memory location speciﬁed by the s ec ond operand.

LSH RK RR

Shift to the left the value in the re gi st e r speci ﬁe d by the ﬁrst operand by the

amount speciﬁed by the second oper and. If the second operand is a re gi st er is must be

C. Vacated positions are ﬁlled with zeros. The eﬀect is undeﬁned if the shift distance

is not in the range 0 to 31.

MUL K R A V G M L D DX DXs DXsB

Multiply register A by the operand placing the double length result in D:A. Signed

arithmetic is used. Unsigned arithmetic is used. Immediate (K) operands may some-

times be packed in the data area.

NEG R A V G M L D DX DXs DXsB

Negate the value speciﬁed by the operand.

NOP F

Performs no operati on.

NOT R A V G M L D DX DXs DXsB

Perform the bitwise complement of the value speciﬁed by the operand.

OR RA RV RG RM RL RD RDX RDXs RDXsB

RR AR VR GR MR LR DR DXR DXsR DXsBR

RK AK VK GK MK LK DK DXK DXsK DXsBK

Perform the bitwise OR of the second operand into the ﬁrst.

POP R A V G M L D DX DXs DXsB

Pop one word oﬀ t he stack placing it in the speciﬁed register or memory location.

PUSH K R A V G M L D DX DXs DXsB

Push the speciﬁed constant, register or memory location onto the stack.

RSH RR RK

Shift to the right the value in the register spe ci ﬁ ed by the ﬁrst operand by the amount

speciﬁed by the second operand. If the second operand is a register is must be C.

Vacated positions are ﬁlled with zeros. The eﬀect is undeﬁned if the shift di st anc e is

not in the range 0 to 31.

RTN F

This causes a return from the current function. The result, if any, should b e in A.