Service manual

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• Multifunction PCI to ISA Bridge
- Supports PCI at 30 MHz and 33 MHz
- Supports PCI Rev 2.1 specification
- Supports Full ISA or Extended I/O (EIO) Bus
- Supports full positive decode or subtractive decode of PCI
- Supports ISA/EIO at 1/4 of PCI frequency
• Supports both mobile and desktop deep green environments
- 3.3 V operation with 5 V tolerant buffers
- Ultra-low power for mobile environments
- Power-On Suspend and Soft-OFF for desktop environment
- All registers readable/restorable for proper resume from 0 V suspend
• Integrated IDE Controller
- Independent Timing of up to 4 drives
- PIO Mode 4 transfers up to 14 Mbytes/s
- Supports “Ultra 33” Synchronous DMA mode transfers up to 33 MBytes/sec
- Integrated 8 x 32-bit buffer for IDE PCI Burst
- Supports glue-less “Swap-Bay” option with full electrical isolation
• Enhanced DMA Controller
- Two 8237 DMA controllers
- Supports PCI DMA with 3 PC/PCI channels and Distributed DMA protocols (simultaneously)
- Fast Type-F DMA for reduced PCI bus usage
• Interrupt Controller based on two 82C59
- 15 interrupt support
- Independently programmable for Edge/Level sensitivity
- Supports optional external I/O APIC
- Serial interrupt input
• Timers based on 82C54
- System Timer, Refresh Request, Speaker Tone Output
• USB
- Two USB 1.0 ports for serial transfers at 12 or 1.5 Mbit/sec
- Supports legacy keyboard and mouse software with USB-based keyboard and mouse
- Supports UHCI Design Guide Revision 1.1 Interface
• SMBus
- Host interface allows CPU to communicate via SMBus
- Slave interface allows external SMBus master to control resume events
• Real-Time Clock
- 256 Byte Battery-Pack CMOS SRAM
- Includes Date Alarm
- Two 8-byte Lockout Ranges
• Microsoft Win95/98 compliant
core logic chipset