笔记本维修——笔记本测试卡故障代码表教案.doc

笔记本测试卡——故障代码表 Award 国际软件 EliteBIOS 4.51PG 版本 自检码说明: EISA 自检码大多输出到 300h 地址位；ISA 自检码输出到 80h 地 址位。 代码 (16 进制) 名称 说明 C0 Turn Off Chipset Cache OEM Specific-Cache control 01 Processor Test 1 Processor Status (1FLAGS)Verification. Tests the following processor status flags: carry, zero, sign, overflow, The BIOS sets each flag, verifies they are set, then turns each flag off and verifies it is off. 02 Processor Test 2 Read/Write/Verify all CPU registers except SS, SP, and BP with data pattern FF and 00. 03 Initialize Chips Disable NMI, PIE, AIE, UEI, SQWV. Disable video, parity checking, DMA. Reset math coprocessor. Clear all page registers, CMOS shutdown byte. Initialize timer 0, 1, and 2, including set EISA timer to a known state. Initialize DMA controllers 0 and 1. Initialize interrupt controllers 0 and 1 Initialize EISA extended  registers. 04 Test Memory Refresh Toggle RAM must be periodically refreshed to keep the memory from decaying. This function ensures that the memory refresh function is working properly. 05 Blank video, Initialize keyboard Keyboard controller initialization. 06 Reserved 07 Test CMOS Interface and Battery Status Verifies CMOS is working correctly, detects bad battery. BE Chipset Default Initialization Program chipset registers with power on BIOS defaults. C1 Memory presence test OEM Specific-Test to size on-board memory C5 Early Shadow OEM Specific-Early Shadow enable for fast boot. C6 Cache presence test External cache size detection 08 Setup low memory Early chip set initialization. Memory presence test OEM chip set routines. Clear low 64K of memory. Test first 64K memory. 09 Early Cache Initialization Cyrix CPU initialization. Cache initialization. 0A Setup Interrupt Vector Table Initialize first 120 interrupt vectors with SPURIOUS_INT_HDLR and initializ