Ast I∕O Plus II
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Ast I∕O Plus II
| 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 |
| ECP? | No |
| EPP? | 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
Underside
Related links
- FCC ID is FHQ484AC-1024
- TH99
- Manual
