Acer 486 Manuel d'utilisateur télécharger pdf (Page 15)

Am486

Microprocessor PCI Customer Development Platform

PC and DOS Compatibility

• IDE interface in chipset.

• Standard chipset configuration registers, known to BIOS and DOS.

• Off-the-shelf PC chipset provides common I/O functions found in a PC:

- Two 82C59 interrupt controllers (SMI, NMI, and INT support)

- One 82C54 programmable interval timer

- Two 82C37 DMA controllers (seven channels)

- External boot ROM chip-select signal

- PC-style real-time clock (RTC) (non-Y2K-compliant, disabled by default)

• DS1285 Y2K-compliant RTC chip. The DS1285 RTC can be disabled, and the

non-Y2K RTC enabled, by removing one resistor and populating another.

PC-Style Super I/O

• DOS and PC-AT compatible I/O.

• Two 16550-compatible serial ports.

• One parallel port. Supports enhanced parallel port (EPP) and extended

capabilities port (ECP) modes.

• Floppy disk interface.

• IrDA port with external transceiver (115 Kbyte/s).

Keyboard and Mouse Controller

• 8042-compatible controller chip (included in chipset).

• AT keyboard interface.

• PS/2 Mouse interface.

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Acer 486 Manuel d'utilisateur Page 15