【 Weak current college 】 computer motherboards troubleshooting card code cross reference table (3)---Power By 【 China power house network 】

42 display window to enter SETUP. Descriptor table ready; upcoming virtual way for memory test. Extended CMOSRAM failure.

43 if plug and Play BIOS, serial ports, parallel port initialization. Enter the virtual way; to be implemented for diagnosis..

44. has been interrupted (if it is connected for the diagnosis of switches; will make data for initial preparation to check the memory at 0: 0 wrap. ) BIOS interrupt initialization.

45 initialization math coprocessor. Data has been initially prepared; upcoming check memory at 0: 0 wrap and find out the size of the system memory.

46. testing the storage has been returned; memory size calculation is completed, will be written to the page to test the memory. Check the read only memory ROM version.

47. in the extended memory on the write page; forthcoming basic 640K memory is written to the page.

48. the basic memory write pages; will soon determine memory above 1 MB. Video check, CMOS reconfiguration.

49. identify 1BM following storage and inspection; upcoming determine memory above 1 MB.

4A. identify memory above 1 MB; will check and validate BIOSROM. Make a video of initialization.

4B.BIOSROM data area of the end of the inspection, check the "ESC" and as soft reset to clear the memory above 1 MB.

4C. purge memory above 1 MB (soft reset) will clear the memory above 1 MB-shielded video BIOSROM..

4D have cleared the memory above 1 MB (soft reset); will save memory size.

4E if there are errors detected; the error message is displayed on the monitor, and wait for the customer according to the "F1" key to continue. Start the storage tests: (soft reset); will show the first 64K memory tests. Display copyright information.

4F, reading, writing, soft, hard drive data for DOS boot. Start the size of the display memory is testing memory will make updates; for serial and random access memory test.

50 copies the current BIOS CMOS prison time zone values stored in the CMOS. Complete the following memory test 1MB; about the size of high-speed memory for repositioning and masking. The CPU type and speed to the screen.

51. the test of memory above 1 MB.

52 all ISA read only memory ROM is initialized, the final allocation to PCI IRQ number initialization. Have completed a test of memory above 1 MB; soon to be ready to return to the real site. Enter keyboard detection.

53 if is not Plug and Play BIOS, you initialize the serial ports, parallel ports and setting new values. Save CPU registers and memory size, will enter it by reference.

54. the successful opening of the real address; forthcoming restoration ready outage saved registers. Scan "combat keys"

55. the register has been restored, deactivates the gate circuit A-20 address line.

56. successfully deactivate A-20 address line; soon check BIOSROM data area. The keyboard at the end of the test.

57.BIOSROM data area check by half; continue.

Check the data area of 58.BIOSROM end; clears found "ESC > information. Non-disruptive testing set.

59. in the cleared "ESC > information; information is displayed; the upcoming DMA and interrupt controller testing.

5A.. Display press "F2" key.

5B.. The test base memory address.

5C.. Test patterns in base 640 k memory.

60 sets hard drive boot sector virus protection. By DMA register test page; forthcoming inspection video memory. Test the extended memory.

61 display system configuration table. Video memory test end; upcoming DMA # 1 Basic register test.

62 began to break the system boot 19H. By DMA # 1 Basic register test; upcoming DMA register test no. 2. Test the extended memory address line.

63. by DMA # 2 Basic register test; soon check BIOSROM data area.

64.BIOSROM data area check by half, to continue.

65.BIOSROM data area check the end; the DMA device 1 and 2 programming.

66.DMA units 1 and 2 programming end; will use 59, interrupt controller as initial preparation. Optimally configure Cache registry.

67.8259 initial preparation has ended; upcoming keyboard test.

68 .. so external Cache and Cache CPU internal work.