Acer 486 Specifications download pdf (Page 11)

Chapter 1 Hardware Configuration 3

Specifications

åSystem

• CPU: 80486SX-25, 80486SX-33, 80486DX-33, 80486DX2-50,

80486DX2-66, or 80486DX4-100

• Bus interface: ISA (PC/AT) bus

• System performance:

150 MHz with an 80486DX-33 MHz CPU (Landmark speed V1.14)

• Data bus: 32-bit

• DMA channels: 7

• Interrupt levels: 15

• Processing ability: 32-bit

• Bus speed: 8 MHz

• Chipset: ALI M1219

• Real-time clock/calendar:

Uses DS-12887 RTC chip and quartz oscillator, powered by a

lithium battery for 10 years of data retention

åMemory

• DRAM memory: 1 MB to 32 MB

Uses 256Kx36 (SIMM-256-8), 1Mx36 (SIMM-1000-8) or 4Mx36

(SIMM-4000-8) SIMMs with access time of 80 ns or less

• Shadow RAM memory: Support for system and video BIOS of up

to 256 KB in 32 KB blocks

åI/O

• IDE hard disk drive interface: Supports up to two IDE (AT bus)

hard disk drives. BIOS enabled/disabled

• Floppy disk drive interface:

Supports up to two floppy disk drives, 5¼" (360 KB and 1.2 MB)

and/or 3½” (720 KB and 1.44 MB). BIOS enabled/disabled

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Acer 486 Specifications Page 11