IBM PC 100, Техническое руководство

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Chapter 1. System Description
System Features
The following figure lists the devices and features of the PC 100 and PC 300 system board. It also
includes some of the options that may be added to these computers.
Figure 1 (Page 1 of 2). System Board Devices, Features, and Options
Device Features
Microprocessor Intel Pentium (75/100/120/133 MHz) 2
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32-bit address bus, 64-bit data bus
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8 KB internal (L1) write-through code cache
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8 KB internal (L1) write-back data cache
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Superscalar architecture (two execution units)
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Math coprocessor function included in the Pentium
Microprocessor is upgradable for future Intel microprocessor technology
External Cache (L2) DIP sockets for user-installable data/tag RAMs
256 KB asynchronous write-back unified (code and data)
Video Subsystem Cirrus Logic GD5436 SVGA video controller
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Plug and Play monitor support (DDC2)
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Advanced Power Management
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Local peripheral bus (LPB) interface
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64-bit data path width on PCI bus
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Integrated DAC
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64-bit graphics accelerator
1 MB of 70 ns FP DRAM
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Fast Page Mode DRAM
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Sockets for additional 1 MB
Bus Architecture ISA/PCI-bus-compatible I/O expansion slots
Synchronous 25/30/33 MHz PCI bus
50/60/66 MHz processor bus
Integrated L2 cache controller
Flash ROM Subsystem 256 KB flash ROM for POST/BIOS
RAM Subsystem 8 MB standard DRAM, upgradable to 128 MB
70-ns fast page (FP) or 60-ns extended data output (EDO), non-parity, dynamic
random access memory (DRAM)
Four 72-pin SIMM sockets in two banks
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SIMMs (4 MB, 8 MB, 16 MB, or 32 MB)
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Matched pairs required in each bank
CMOS RAM Subsystem 128-byte CMOS RAM with real-time clock, calendar, and battery
ISA/PCI Bridge ISA/PCI interface
PCI bus-master EIDE interface
ISA-compatible interrupt controller
ISA-compatible DMA controller
DMA Controller Seven AT-compatible DMA channels
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Four 8-bit channels
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Three 16-bit channels
Interrupt Controller 15 levels of system interrupts
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AT bus interrupts are edge triggered
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PCI bus interrupts are level sensitive
System Timers Channel 0–System timer
Channel 1–Refresh generation
Channel 2–Tone generation for speaker
Audio Subsystem On-board Piezo electric beeper
2 MHz denotes internal clock speed of the microprocessor only; other factors might also affect application performance.
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Technical Information Manual