National CP3BT26 User Manual

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22

RETX

Return from exception

PUSH

imm, Rsrc, RA

Push “imm” number of registers on user stack, starting 
with Rsrc and possibly including RA

POP

imm, Rdest, RA

Restore “imm” number of registers from user stack, 
starting with Rdest and possibly including RA

POPRET

imm, Rdest, RA

Restore registers (similar to POP) and JUMP RA

LOADi

disp(Rbase), Rdest

Load (register relative)

abs, Rdest

Load (absolute)

(Rindex)abs, Rdest

Load (absolute index relative)

(Rindex)disp(RPbasex), Rdest

Load (register relative index)

disp(RPbase), Rdest

Load (register pair relative)

LOADD

disp(Rbase), Rdest

Load (register relative)

abs, Rdest

Load (absolute)

(Rindex)abs, Rdest

Load (absolute index relative)

(Rindex)disp(RPbasex), Rdest

Load (register pair relative index)

disp(RPbase), Rdest

Load (register pair relative)

STORi

Rsrc, disp(Rbase)

Store (register relative)

Rsrc, disp(RPbase)

Store (register pair relative)

Rsrc, abs

Store (absolute)

Rsrc, (Rindex)disp(RPbasex)

Store (register pair relative index)

Rsrc, (Rindex)abs

Store (absolute index)

STORD

RPsrc, disp(Rbase)

Store (register relative)

RPsrc, disp(RPbase)

Store (register pair relative)

RPsrc, abs

Store (absolute)

RPsrc, (Rindex)disp(RPbasex)

Store (register pair index relative)

RPsrc, (Rindex)abs

Store (absolute index relative)

STOR IMM

imm4, disp(Rbase)

Store unsigned 4-bit immediate value extended to operand 
length in memory

imm4, disp(RPbase)

imm4, (Rindex)disp(RPbasex)

imm4, abs

imm4, (Rindex)abs

LOADM

imm3

Load 1 to 8 registers (R2-R5, R8-R11) from memory 
starting at (R0)

LOADMP

imm3

Load 1 to 8 registers (R2-R5, R8-R11) from memory 
starting at (R1, R0)

STORM

STORM imm3

Store 1 to 8 registers (R2-R5, R8-R11) to memory starting 
at (R2)