LC$-3$ Assembly Programming: The beginning of the end

Overview

Recall lab $12$ where you were tasked with printing a single character. In this lab, you are tasked with printing a string.

Specification

$-$ The program must start at x$3000$

$-$ The program will accept an unknown number of ASCII characters, in the following order: $($we guarantee all characters will be valid$)$

i$.$ The character to print for bit $0$

ii$.$ The character to print for bit $1$

iii. The string whose pixel map to print

$-$ The string will be terminated by an LF character

or $0$xA

$-$ You can type this character by simply pressing enter

$-$ We guarantee the string will be at most $10$ characters long, including the LF character

$-$ You SHOULD NOT draw the LF character itself

$-$ The program must use GETC to get the characters instead of IN

$-$ The inclusion of the string $"$IN$"$ anywhere within lab$13.$asm will result in an immediate $0$

$-$ The program will need to access the font data, provided in font$\_$data.asm

$-$ Do not edit this file

$-$ For grading, we will replace this file with an exact same copy

From lab $12$:

$-$ For printing newline characters, use xA for LF$.$ Do not use xD$.$

$-$ There must be exactly $16$ LFs $($including one on the last line!$)$

$-$ Print only the pixel map of the string that was input. Do not echo any prompts or anything else to the user. Example

$```$

What should be printed for $".$@Pipeline"

$```$

$```$

$.$@@$..$@@$..$ @@@$..$@@@$.$@@@$...$@@@@@$.....$@@$.....$@@@ $..$@@$.$@@@$...$@@@@@$..$

$```$

$```$

$.$@@$.......$@@$...$@@@$..$@@$.$@@@@@@@$....$@@$.....$@@$....$@@$..$@@$.$@@@@@@@$.$

$.$@@$.......$@@$...$@@@$.$ @@$.$@@$........$@@$.....$ @@@$...$@@$..$@@$.$@@$......$

$```$

$```$

$.............................................................................$

$```$

Reminder

Avoid The Four Deadly Sins of LC$-3$:

$\backslash (\backslash$square $\backslash )$ NEVER assume the value of a register before you set it

$\backslash (\backslash$square $\backslash )$ NEVER assume the value at an unspecified memory address

$-$ NEVER change the $.$ORIG location of your program

$-$ NEVER forget to halt and make sure that you are halting correctly using the correct TRAP vector