Question: Rewrite the following keyboard echo routine without indirect addressing. It means that you are not allowed to use LDI or STI instructions. The program must

Rewrite the following keyboard echo routine without indirect addressing. It means that you are not allowed to use LDI or STI instructions. The program must start at address x3000.

.ORIG x3000

POLL1 LDI R0, KBSRPtr

BRzp POLL1

LDI R0, KBDRPtr

POLL2 LDI R1, DSRPtr

BRzp POLL2

STI R0, DDRPtr

...

KBSRPtr .FILL xFE00

KBDRPtr .FILL xFE02

DSRPtr .FILL xFE04

DDRPtr .FILL xFE06

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