Question

How to convert a decimal value to 7-bit ASCII code and ASCII with even parity? Please use 1234 as an example.

Answer 1

There is no easy way of remembering ASCII codes
Go through ASCII table and make the conversions
I am adding parity bit on left side of the 7-bits. If you want to add on right side, you can do so.
I am providing explanations..

1 -> 49 -> 0110001
Parity bit is 1
So, 1 in 8-bit ASCII is 10110001

2 -> 50 -> 0110010
Parity bit is 1
So, 2 in 8-bit ASCII is 10110010

3 -> 51 -> 0110011
Parity bit is 0
So, 3 in 8-bit ASCII is 00110011

4 -> 52 -> 0110100
Parity bit is 1
So, 4 in 8-bit ASCII is 10110100

In binary:  10110001 10110010 00110011 10110100