Lenovo ThinkPad 770X Technical Reference Manual for the ThinkPad 770 - Page 14
System Overview, Part 2 of 2. System Board Devices and Features
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Device Interrupt controller Keyboard/auxiliary device controller Diskette drive controller Serial controller port Parallel controller port Expansion bus adapter (PCI-bus) PCMCIA** slots Modem subsystem Infrared subsystem Universal serial bus (USB) Type 1 1 2 2 1 - - - - - Features 15 levels of system interrupts (interrupts are edge-triggered) Internal keyboard TrackPoint Auxiliary device connector Password security Supports: 3.5-in. diskette (1.44 MB) 3.5-in. diskette (1.2 MB) 3.5-in. diskette (720 KB) EIA-232-E interface (16550 compatible) Programmable as serial port 1, 2, 3, or 4 One 9-pin, D-sub connector Programmable as parallel port 1, 2, or 3 IEEE P1284-A compatible Supports bidirectional input and output Enhanced Parallel Port (EPP) compatible Extended Capabilities Port (ECP) compatible Supports externally attached devices: SelectaDock docking system Port replicator Conforms to the standards for: CardBus Two Type I or II PC cards One Type III PC card Is driven by: MDSP 3780i SRAM 32 Kb by 40 bits Crystal Audio Voice band CODEC for modem Internal DAA Internal omnidirectional microphone Supports: ThinkPad IR/SIR/D-ASK (500 KHz) IR Supports: USB input and output devices Figure 1-2 (Part 2 of 2). System Board Devices and Features 1-4 System Overview