Design a subroutine to display the ascii character

Assignment Help Computer Engineering

Reference no: EM131531040

Question: A memory-mapped VDT displays the 1024 8-bit characters starting at $00 F000 on a CRT terminal as 16 lines of 64 characters. The address of the top left-hand character is $00 F000, and the address of the bottom right-hand character is $00 F3FF. Design a subroutine to display the ASCII character in DO in the next free position of the display. A cursor, made up of a row count and a column count, points to the next free position into which a character is to be written. As each character is received, it is placed in the next column to the right of the current column counter. Certain characters affect the position of the cursor without adding a new character to the display. These characters are

When the cursor is positioned on the bottom line of the display, a line feed causes all lines to move up one row (i.e.., scroll up). This creates a new, clear bottom line and causes the previous top line to be lost. Construct a subroutine to implement the preceding memory-mapped display. On entry to the subroutine, AO points to the current row position and Al to the column position.

Reference no: EM131531040

Questions Cloud

Compare and contrast the difference between stocks and bonds : The value of a bond is dependent primarily on two factors. Name and explain these factors. Compare and contrast the differences between stocks and bonds.

Explain the meaning and significance of each of given terms : Write a subroutine to sort an array of N 8-bit elements into descending order. On entry to the subroutine, A2 contains the first (i.e., lowest) address.

What is firm market capitalization-cost of preferred stock : What is the firm’s Market Capitalization? What is the cost of the preferred stock? What is the cost of the common stock?

Display desserts in restaurants : To display desserts in restaurants, Mario Sclafani ordered refrigeration units from Felix Storch, Inc. Felix faxed a credit application to Sclafani.

Design a subroutine to display the ascii character : A memory-mapped VDT displays the 1024 8-bit characters starting at $00 F000 on a CRT terminal as 16 lines of 64 characters.

Purpose of assignment : In business, understanding the role of the manager in an organization is fundamental for employees.

What is the expected return of the portfolio : Your portfolio is invested 28 percent each in A and C and 44 percent in B. What is the expected return of the portfolio?

What is the employee argument : What is the employee's argument? Why does he think he was fired? In his view, which specific provision in the NLRA was broken?

What factors led to the redefinition of the patient : What factors led to the redefinition of the patient as a consumer in the late twentieth century?

User Account

All Pages