Homework Assignment 3
Due Feb. 2, 1996

1. Write a program which increments address 0x1004 indefinitely. (Address 0x1004 is connected to pins on the HC11 package, so can we can observe this address incrementing externally.)

2. Write a program which fills memory locations from 0x0180 to 0x01FF with an alternating pattern 0x00 and 0xFF. I.e., even addresses, such as 0x0180 and 0x01CA, will be filled with 0x00, and odd addresses, such as 0x181 and 0x016F, will be filled with 0x0FF.

3. Write a program to take all the data in locations 0xE000 to 0xE07F into locations 0x0180 to 0x01FF.

4. Write a program that puts the greatest one-byte 2's complement number from memory locations 0xE000 through 0xE01F in accumulator A, and into memory location 0x0000.

5. Write a program that puts the greatest unsigned number from memory locations 0xE000 through 0xE01F in accumulator A, and stores it in memory location 0x0001.

6. Write a program that counts the number of negative numbers in the memory locations 0xE000 through 0xFE77. Store the result in memory starting at location 0x0002. (Hint: There are more than 255 negative numbers in the specified memory locations).