Ast I∕O Plus II

From Vogons Wiki
Jump to: navigation, search
Ast I∕O Plus II
Ast I∕O Plus II.jpg
Bus type ISA
Bus width 8-bit
Bus speed 4.77 MHz
Manufacturer Ast Research
Chipset Unknown
Compatible with RS232, LPT, Gameport, Apple II Gameport, RTC
Connectors Gameport, LPT
Requires -5VDC? No
Requires -12VDC? Yes
Config method Jumpers
IO Controller
Serial ports 2
UART 8250
COM1/2/3/4? Yes / Yes / No / No
Parallel ports 1
Bi-dir? No
LPT1/2/3/4? Yes / Yes / No / No
Game ports 1
Driver N/A

The Ast Research I∕O Plus II is a serial/parallel/gameport board.

Socket U4 is optional, and can be populated with a compatible UART to provide a second serial port. In the main photo a Winbond W86C250B can be seen here. This is an equivalent part to the INS8250N-B providing the first serial port. Both these parts are 8250-compatible UARTs.

Additional photos

Related links