主板诊断卡数字代码（Mainboard diagnostic card number code）.docVIP

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2017-07-15 发布于河南
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主板诊断卡数字代码（Mainboard diagnostic card number code）.doc

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主板诊断卡数字代码（Mainboard diagnostic card number code）

主板诊断卡数字代码（Mainboard diagnostic card number code） The configuration of the system is displayed; Will control INI19 boot load. . 01 processor test 1, processor state verifies, if the test fails, the loop is infinite. Processor register tests are about to begin, and unblocking interrupts are about to be stopped. CPU register tests are ongoing or fail. Determine the type of diagnosis (normal or manufacturing). If the keyboard buffer contains data, it will fail. Disable unmasking interrupt; Start with a delay. CMOS write/read is in or out. Remove 8042 keyboard controller and send out the TESTKBRD command (AAH). ROM BIOS checkups are ongoing or fail. 4 reset the 8042 keyboard controller to verify the TESTKBRD. Soft reset/power test for keyboard controller. Programmable interval timer tests are being performed or failed. If repeated manufacturing tests 1 to 5 are repeated, 8042 control status can be obtained. The soft reset/power is determined; The ROM is to be started. The DMA is starting or failing. Make the circuit chip initial preparation, disable video, parity, DMA circuit, and clear DMA circuit, all page registers and CMOS outage bytes. The ROM BIOS check sum has been set up and the keyboard buffer is checked. The DMA initial page register read/write test is ongoing or malfunctioning. 7 processor test 2, verify the CPU registers work. ROM BIOS check sum is normal, keyboard buffer has been cleared, and the keyboard is issued BAT (basic guarantee test) command. . Make the CMOS timer as the initial preparation, normal update timer cycle. The BAT command has been issued to the keyboard, which is about to be written to the BAT command. RAM update inspection is ongoing or failure. 09 EPROM check sum must be equal to zero. Verify the basic guarantee test of the keyboard and then verify the keyboard command bytes. The first 64K RAM test is ongoing. 0A makes video interface initial preparation. Issue keyboard command byte code to write command byte data. The first 64K RAM chi