82378ZB データシートの表示（PDF） - Intel

部品番号

コンポーネント説明

メーカー

82378ZB

82378ZB SYSTEM I/O (SIO) AND 82379AB SYSTEM I/O APIC (SIO.A)

Intel 

E

82378ZB (SIO) AND 82379 (SIO.A)

3.4.4. ICW3—INITIALIZATION COMMAND WORD 3 REGISTER ................................ ........................... 73

3.4.5. ICW4—INITIALIZATION COMMAND WORD 4 REGISTER ................................ ........................... 74

3.4.6. OCW1—OPERATIONAL CONTROL WORD 1 REGISTER ................................ ........................... 74

3.4.7. OCW2—OPERATIONAL CONTROL WORD 2 REGISTER ................................ ........................... 75

3.4.8. OCW3—OPERATIONAL CONTROL WORD 3 REGISTER ................................ ........................... 76

3.5. CONTROL REGISTERS ................................ ................................ ................................ ........................... 77

3.5.1. NMISC—NMI STATUS AND CONTROL REGISTER ................................ ................................ ..... 77

3.5.2. NMI ENABLE AND REAL-TIME CLOCK ADDRESS REGISTER ................................ .................. 78

3.5.3. PORT 92 REGISTER ................................ ................................ ................................ ......................... 78

3.5.4. DIGITAL OUTPUT REGISTER ................................ ................................ ................................ ......... 79

3.5.5. RESET UBUS IRQ1/IRQ12 REGISTER ................................ ................................ .......................... 79

3.5.6. COPROCESSOR ERROR REGISTER ................................ ................................ ............................ 80

3.5.7. ELCR—EDGE/LEVEL CONTROL REGISTER ................................ ................................ ............... 80

3.6. POWER MANAGEMENT REGISTERS ................................ ................................ ................................ ... 80

3.6.1. APMC—ADVANCED POWER MANAGEMENT CONTROL PORT ................................ .............. 81

3.6.2. APMS—ADVANCED POWER MANAGEMENT STATUS PORT ................................ .................. 81

3.7. APIC REGISTERS (82379AB ONLY) ................................ ................................ ................................ ...... 81

3.7.1. IOREGSEL—I/O REGISTER SELECT REGISTER (82379AB Only) ................................ ............ 82

3.7.2. IOWIN—I/O WINDOW REGISTER (82379AB Only) ................................ ................................ ....... 82

3.7.3. APICID—I/O APIC IDENTIFICATION REGISTER (82379AB Only) ................................ .............. 82

3.7.4. APICID—I/O APIC VERSION REGISTER (82379AB Only) ................................ ........................... 83

3.7.5. APICARB—I/O APIC ARBITRATION REGISTER (82379AB Only) ................................ ............... 83

3.7.6. IOREDTBL[15:0]—I/O REDIRECTION TABLE REGISTERS (82379AB Only) ............................. 83

4.0. FUNCTIONAL DESCRIPTION .................................................................................................................... 86

4.1. MEMORY AND I/O ADDRESS MAP ................................ ................................ ................................ ....... 86

4.1.1. MEMORY ADDRESS MAP (GENERATING MEMCS#) ................................ ................................ . 86

4.1.2. BIOS MEMORY SPACE ................................ ................................ ................................ .................... 87

4.1.3. I/O ACCESSES ................................ ................................ ................................ ................................ .. 87

4.1.4. SUBTRACTIVELY DECODED CYCLES TO ISA ................................ ................................ ............ 88

4.1.5. UTILITY BUS ENCODED CHIP SELECTS ................................ ................................ ..................... 88

4.2. PCI INTERFACE ................................ ................................ ................................ ................................ ....... 88

4.2.1. PCI COMMAND SET ................................ ................................ ................................ ......................... 88

4.2.2. TRANSACTION TERMINATION ................................ ................................ ................................ ....... 89

4.3. PCI ARBITRATION CONTROLLER ................................ ................................ ................................ ........ 90

4.3.1. ARBITRATION SIGNAL PROTOCOL ................................ ................................ .............................. 90

4.3.2. INTERNAL/EXTERNAL ARBITER CONFIGURATION ................................ ................................ ... 91

4.3.3. Guaranteed Access Time Mode ................................ ................................ ................................ ........ 92

4.3.3.1. DMA LATENCIES IN GAT MODE ONLY (82378ZB ONLY) ................................ .................... 92

4.4. ISA INTERFACE ................................ ................................ ................................ ................................ ....... 92

4.4.1. ISA CLOCK GENERATION ................................ ................................ ................................ ............... 93

4.5. DMA CONTROLLER ................................ ................................ ................................ ................................ . 93

5

Share Link: