Technical Specifications for the BeBox

I/O Devices

Serial Ports

Four industry-standard, 9-pin, AT-style serial ports ports are provided. The serial UARTs are compatible with the 16550 (16-byte FIFO) serial controller.

Two of the ports (Serial 1 and 2) are ISA/PREP-compliant, located in the address space for COM1 and COM2. The other two ports (Serial 3 and 4) are clocked by a nonstandard frequency compatible with MIDI. (Normal baud rates will continue to be supported on these ports.)

Technical Documentation for the Serial Ports

The TL16C554 provides the third and fourth serial and midi controllers.
The Intel 82091AA Advanced Integrated Peripheral provides Super I/O for the BeBox (namely IDE, Floppy, Parallel, Serial, and GamePort functionality)

Serial Port Source Code

The following header file, from Be Inc's kernel source for the BeBox, offers some more information about the accessing the serial ports on the BeBox.

Serial Port Definitions

Questions? Comments? Contact Andrew Lampert (webmaster at bebox dot nu).