半长CPU卡 SBC-455 SBC-455

CPU
80486SX/DX/DX2/DX425/33/40/50/66/75/100/120_MHz, 5x86-100/120/133 or Pentium OverDrive processor

BUS INTERFACE
ISA bus

DATA BUS
32-bit

CHIPSET
ALi/1489/1487

RAM MEMORY
1_MB to 64_MB. Uses two 72-pin SIMM sockets

L2 CACHE MEMORY SIZE
128/256/512_KB 2nd level cache memory

SHADOW RAM MEMORY
Supports system and video BIOS shadow memory

FLAT PANEL/CRT SVGA CONTROLLER
SVGA, PCI-bus CHIPS 65548 chipset with 512_KB standard video memory, upgradable to 1_MB. Provides 32-bit graphic throughput. Features the ability to control most TFT, STN, B/W, EL flat panel displays as well as standard CRT. Supports resolutions up to 1024 x 768 in 256 colors. Daughterboards available for various flat panel displays

ENHANCED IDE HARD DISK DRIVE INTERFACE
Fast PCI bus. Supports up to two Enhanced IDE (ATA-2) large hard disk drives or other Enhanced IDE devices. Supports mode 3 and mode 4 hard disks (data transfer rate 11.1_MB/ sec. minimum)

BI-DIRECTIONAL PARALLEL/PORT
Configurable to LPT1, LPT2, LPT3 or disabled Supports SPP/EPP/ECP standards

SERIAL PORTS
Two serial RS-232 ports, uses 16C550 UARTs with 16-byte FIFO buffer. Supports speeds up to115_kbps. Ports can be individually configured from COM1 to COM4 or disabled

BIOS
AMI Flash WIN BIOS

WATCHDOG TIMER
Can generates a system reset or IRQ15. The time interval is software selectable from 2 to 32 seconds (15 steps, 2 seconds per step)

PC/104
104-pin connector for a 16-bit bus

DMA CHANNELS
7

INTERRUPT LEVELS
15

KEYBOARD PS/2 MOUSE CONNECTOR
A 6-pin mini DIN keyboard connector is located on the mounting bracket for easy access to a keyboard and a PS/2 mouse

BUS SPEED
8_MHz

SYSTEM PERFORMANCE
325_MHz  in 80486 DX-4 100 (Landmark V2.0)

MAX. POWER REQUIREMENT
+5_V @ 2.5_A

POWER SUPPLY VOLTAGE
+5_V (4.75_V to 5.25_V), +12_V; for DX4-100/120 and P24T CPUs, a cooler is necessary

OPERATING TEMPERATURE
32 to 140°_F (0 to 60°_C)

BOARD SIZE
7.3" (L) x 4.8" (W) (185_mm x 122_mm)

BOARD WEIGHT
0.6_lbs (0.26_Kg)