Day 10

Question 1

To be memorized

Answer 1

Question 2

I/O has two registers.

Data register

output register

describe them.

Answer 2

Question 3

Write down the character output program

Answer 3

Question 4

Explain carriage return/catridge return/CR

Answer 4

control character or mechanism used to reset a device’s position to the beginning of a line of text

Question 5

Assembly conventions - explain

• .org
• .equ
• .dc.
• dcw
• deh
• .db
• .dh
• .dn

Answer 5

• .org - define the beginning of the program
• .equ - define a label for a constant value
• .dc - 32 bit memory words allocation
• .dcw - 8 bit memory words allocation
• .deh - 16 bit memory words allocation
• .db -
• .dh
• .dn