You must show your work to receive full credit. This assignment is due Monday, 9 April.
Write a trap routine, number x40, that drains the keyboard input. This routine should use the keyboard status and data registers to read all input characters until it reads an EOT, End-of-Transmssion, represented in ASCII with the binary value 4. Your TRAP routine should not echo any input characters.
Write a little bit of assembly code that
uses the stack to evaluate the following C-expression.
You may assumes that variables A, B,
and C have all been defined and will reside on
the same memory page as the code you write.
You may use the POP and PUSH
subroutines of section 10.2.1.