1 / 30

Chapter 4 Key Terms

Chapter 4 Key Terms. Brian Linger. Flash Memory. EEPROM Can be reprogrammed by the user with software Nonvolatile. Memory Bank. An area on the system board that contain slots for memory modules Typically Labeled (0,1,2, and 3) An institution that tries to keep all of our money. FSB.

dkowalski
Download Presentation

Chapter 4 Key Terms

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 4 Key Terms Brian Linger CS-120

  2. Flash Memory • EEPROM • Can be reprogrammed by the user with software • Nonvolatile CS-120

  3. Memory Bank • An area on the system board that contain slots for memory modules • Typically Labeled (0,1,2, and 3) • An institution that tries to keep all of our money CS-120

  4. FSB • Also called the “Memory” bus • Runs at a fraction of the CPU Speed • Generally 64 bits wide on Pentium class machines CS-120

  5. DRAM • Dynamic Random Access Memory • Used for Primary memory • Usually consists of a transistor/capacitor pair • Requires refreshing every few milliseconds CS-120

  6. SRAM • Static Ram • Usually consists of 6 transistors • Does not require refreshing • Faster, larger, and more expensive • Also comes in Bursting varieties CS-120

  7. Buffer • Temporary memory area where data is kept before being written to a drive or other device • Reduces the number of writes need when devices communicate at different speeds CS-120

  8. Asynchronous SRAM • Static RAM • Does not work in step with the CPU • Slower than synchronous SRAM CS-120

  9. Synchronous SRAM • Works in step with the CPU • More expensive than Asynchronous • About 30% faster • Comes in Burst as well as Pipelined Burst varieties CS-120

  10. FPM Memory • Fast Page Mode • Only requires the column address once for many access to memory near that row • Allows for Paging, Bursting, as well as interleaving CS-120

  11. EDO Memory • Extended Data Output • Eliminates the delay before issuing the next memory address • Can enhance system speed 10-20% • Also comes in Burst configuration BEDO CS-120

  12. DDR SDRAM • Double Data Rate • 64 bit data path • Runs at twice the speed of the system clock • Transfers data during the rise and fall of the system clock CS-120

  13. RDRAM • Direct Rambus DRAM • Uses narrow 16 bit data path • 184 pins • Runs at 400-800mhz CS-120

  14. ECC Memory • Error Checking and Correction • Uses either 7 or 8 extra bits per byte • Can detect and correct single bit errors • Can detect double bit errors CS-120

  15. SODDR + SOCRIMM • ‘Small Outline’ • Fewer Pins • SODDR 140 pins • SDCRIMM 160 pins CS-120

  16. Conventional Memory • Memory addresses between 0 and 640K • Originally considered all that a user could want • Also called ‘BASE’ memory • “640K is all anybody will ever need” • -Bill Gates early 80’s CS-120

  17. UMB • Upper Memory Block • Group of memory addresses from 640K to 1MB • Used by device drivers and TSRs CS-120

  18. Expanded Memory • Memory outside of conventional 640K and extended 1024K • Accessed in 16K segments called ‘Pages’ • Created by Lotus Intel and Microsoft (LIM) CS-120

  19. Extended Memory • Memory above 1 MB • First 64K called ‘High’ memory • Managed by the OS as a device CS-120

  20. MEM • Program used by DOS to display memory usage • Can be given the command switch ‘/c’ to display a more detailed memory map CS-120

  21. Memory Type Total Used Free ---------------- -------- -------- -------- Conventional 640K 31K 609K Upper 155K 155K 0K Reserved 384K 384K 0K Extended (XMS) 64,357K 77K 64,280K Total memory 65,536K 647K 64,889K Total under 1 MB 795K 186K 609K Largest executable program size 609K (623,136 bytes) Largest free upper memory block 0K (0 bytes) MS-DOS is resident in the high memory area. CS-120

  22. MSD • Microsoft Diagnostics • Executed from Dos • Gives detailed information about your computers hardware settings. • Can give faulty information if used from Windows CS-120

  23. Virtual Memory • Uses hard drive space to act as primary memory • Called a ‘Swap’ file • Considerably slower than main memory CS-120

  24. DIMM • Dual In-Line Memory Module • 168 pins • 64 bit data path • 3.3 or 5 volt configurations CS-120

  25. SIMM • Single In-Line Memory Module • 30 or 72 pin packages • 32 bit data bus CS-120

  26. TSR • Terminate Stay Resident • A program that remains in memory • Can be loaded into upper memory with the “LOADHIGH” Command CS-120

  27. CONFIG.SYS • Located in your Root directory • Used to load device drivers and other programs • No longer required in Win9x CS-120

  28. AUTOEXEC.BAT • Located in your root directory • Used to load TSR and device driver programs at startup • Similar to your Win9x ‘Startup’ folder • Should be edited with a text editor • No longer necessary in Win9x CS-120

  29. Hexadecimal Quiz 5F + 1A 79h 19 + 3B 54h CC + DD 1A9h CS-120

  30. Binary Quiz 101100 1101001 11010010 11001 111111 1101111 +10011+101010+1100011 CS-120

More Related