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→Pick Two Options
# Create a subroutine which enables the user to enter two numbers of up to two digits. Indicate where the cursor is, and allow the user to use the digit keys (0-9), backspace, and enter keys. Return the user's input value in the accumulator (A) register.
# Using this subroutine, write a program which add the two numbers (each of which is in the range 0-99) and print the result.
* Optional challenge: extend to more than 2 digits and add a running total capability with a clear key.
==== Option 2: Data Input Form ====
1750 Finch Ave E
Toronto ON M2J 2X5
* Optional challenge: validate the province/territory and the postal code format.
==== Option 3: Hexdump ====
# Create a subroutine which enables the user to enter a 4-digit hexadecimal value. Allow the use of the backspace key for editing, and show the user the cursor location. Decide how the data will be returned by this subroutine.
# Using this subroutine, ask the user for a starting address and a length (in bytes), and then output a hexdump of the specified memory locations, formatted to show address and data information in some layout. If the output is longer than the screen, pause for user input (e.g., "Press ENTER to continue" or something similar) every 20 lines.
* Optional challenge: add a display of ASCII data on the right-hand side, similar to the output of the linux command <code>od -A x -t xz -v ''filename''</code>
==== Option 4: Screen Colour Selector ====
# Create a subroutine which displays on the character display a list of colours available on the bitmapped display, one colour per line, with one of the colours names highlighted in reverse video (white on black). The user may use the up/down arrow keys to change the highlighted row. Return the user's selection as a number in the accumulator (A) register when they press Enter.
# Using this subroutine, get a colour from the user, then fill the bitmap display with this colour, and allow the user to select a different colour.
* Optional challenge: update the colour on the bitmapped display as the user scrolls through the colour-selector list.
=== Write-Up ===
