0x04 is EOT, a control character that denotes end of trasmission. Captial A is 0x41 in ASCII.
Anyway from the text it seems to me like this:
1: read a byte from an address (2000 at the beginning)
2: if byte_read is equal to 0x04 jump to end
3: add parity bit to byte_read
4: store the byte to the same address from which you read it
5: increment address
6: goto 1
end:
Anyway from the text it seems to me like this:
1: read a byte from an address (2000 at the beginning)
2: if byte_read is equal to 0x04 jump to end
3: add parity bit to byte_read
4: store the byte to the same address from which you read it
5: increment address
6: goto 1
end: