GMS30004 datasheet(34/158 Pages) HYNIX

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(6) LYM

Naming :

Load Y-Register form Memory

Status :

Set

Format :

Function :

à M(X,Y)

Data from the RAM location addressed by the X-register and

Y-register is loaded into the Y-register. Data in the memory is

left unchanged.

(7) LAM

Naming :

Load Accumulator from Memory

Status :

Set

Format :

Function :

à M(X,Y)

Data from the RAM location addressed by the X-register and

Y-register is loaded into the Y-register. Data in the memory is

left unchanged.

(8) XMA

Naming :

Exchanged Memory and Accumulator

Status :

Set

Format :

Function :

M(X,Y)

ä A

Data from the memory addressed by X-register and Y-register

is exchanged with data from the accumulator. For example,

this instruction is useful to fetch a memory word into the

accumulator for operation and store current data from the

accumulator into the RAM. The accumulator can be restored

by another XMA instruction.

(9) LYI i

Naming :

Load Y-Register from Immediate

Status :

Set

Format :

Operand :

Constant 0

õ i õ 15

Function :

à i

To load a constant in Y-register. It is typically used to specify

Y-register in a particular RAM word address, to specify the

address of a selected output line, to set Y-register for

specifying a carrier signal outputted from OUT port, and to

initialize Y-register for loop control. The accumulator can be

restored by another XMA instruction.

Data of four bits from operand of instruction is transferred to

the Y-register.

Chapter 3. Instruction

GMS30004 Datasheet(PDF) 34 Page - Hynix Semiconductor

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