Business Programming I

1. Business Programming I Fall – 2000 By Jim Payne

2. Alphanumeric Storage • Numbers that are not numbers? • Alphabetic Characters A,B,C,a,b,c • Special Symbols * ( [ { ? / + : Jim Payne - University of Tulsa

3. Coding Systems • EBCDIC – used in many mainframes • Extended Binary Coded Decimal Interchange Code • An IBM coding system used mainly on mainframe computers • ASCII – used on most PC’s • American Standard Code for Information Interchange Jim Payne - University of Tulsa

4. Jim Payne - University of Tulsa

5. The capital letter A has a hex value of 41, and a binary value of Jim Payne - University of Tulsa

6. The alphanumeric 7 has a hex code of 37, and a coded binary ascii code of Jim Payne - University of Tulsa

7. What is the binary equivalent of GO TU! Jim Payne - University of Tulsa

8. HD 1.4MB diskette 2 sides * 80 tracks * 18 sectors = 2880 allocation units @ 512 bytes each Total space = 1,474,560 bytes Less 33 allocation units for system information = Available Storage = 1,457,664 bytes Jim Payne - University of Tulsa

9. Allocation unit 2880 @ 512 bytes each Sector 18 Sides 2 Tracks 80 Jim Payne - University of Tulsa

10. 1 allocation unit 512 bytes = 4096 bits 0100000101000001……. magnetized spots Jim Payne - University of Tulsa

11. Convert to Binary? • The number 11 • The alphanumeric 11 • The zip code 74104 • The salary 74104 Jim Payne - University of Tulsa

12. switches CPU Primary RAM 101010101010100100101000101010101001010101010101 Input Output How many bytes? How many bits? in each Jim Payne - University of Tulsa

13. CPU 64MB of RAM 1024*1024 = 1,048,576 = 1 Megabyte * 64 = 67,108,864 bytes * 8 = 536,870,910 bits or switches Input Output Disks: 1.4MB 10 Gigabytes 100 MB Zip Jim Payne - University of Tulsa

14. Go TU !!! Jim Payne - University of Tulsa