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4 SBC-455 User's Manual
Specifications
CPU: 80486SX/DX/DX2/DX4 25/33/40/50/66/75/100/120 MHz, 5x86-100/120/
133 or Pentium OverDrive processor
Bus interface: ISA bus
Data bus: 32-bit
Processing ability: 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)
Floppy disk drive interface: Supports up to two floppy disk drives, 5 1/
4"¼" (360 KB and 1.2 MB) and/or 3 1/2" (720 KB, 1.44 and 2.88 MB)
Bidirectional 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 to 115 Kbps. Ports can be individually
configured from COM1 to COM4 or disabled.
BIOS: AMI Flash WIN BIOS
Watchdog timer: Can generate 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