STB SYSTEMS, INC.
RIO PLUS
| 
 Card Type  | 
 Memory/Multi-I/O  | 
| 
 Maximum Onboard Memory  | 
 384KB DRAM  | 
| 
 I/O Options  | 
 Apple ][ game port, clock/calendar, parallel port, SASI hard drive controller, serial port  | 
| 
 Data Bus  | 
 8-bit ISA  | 
| 
 Hard Drives Supported  | 
 Up to seven SASI drives  | 
| 
 CONNECTIONS  | |||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | 
| 
 Apple ][ game port  | 
 J1  | 
 Parallel or SASI port  | 
 J4  | 
| 
 Unidentified  | 
 J2  | 
 Serial port  | 
 J5  | 
| 
 1.5V AA battery connector  | 
 J3  | ||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Setting  | 
 Label  | 
 Position  | |
| » | 
 Memory enabled  | 
 SW1/3  | 
 On  | 
| 
 Memory disabled  | 
 SW1/3  | 
 Off  | |
| » | 
 Parallel port address is 378h  | 
 SW1/6  | 
 Off  | 
| 
 Parallel port address is 278h  | 
 SW1/6  | 
 On  | |
| » | 
 Serial port address is 3F8h (COM1:)  | 
 SW1/7  | 
 Off  | 
| 
 Serial port address is 2F8h (COM2:)  | 
 SW1/7  | 
 On  | |
| » | 
 J4 is a parallel port  | 
 SW1/8  | 
 Off  | 
| 
 J4 is a SASI port  | 
 SW1/8  | 
 On  | |
| 
 DRAM  | ||||||
| 
 Size  | 
 Bank 0  | 
 Parity 0  | 
 Bank 1  | 
 Parity 1  | 
 Bank 2  | 
 Parity 2  | 
| 
 64KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 128KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 NONE  | 
 NONE  | 
| 
 192KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
| 
 256KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
| 
 320KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
| 
 384KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
| 
 DRAM (CON’T)  | ||||||
| 
 Size  | 
 Bank 3  | 
 Parity 3  | 
 Bank 4  | 
 Parity 4  | 
 Bank 5  | 
 Parity 5  | 
| 
 64KB  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 128KB  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 192KB  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 256KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 320KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 NONE  | 
 NONE  | 
| 
 384KB  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
 (8) 64K x 1  | 
 (1) 64K x 1  | 
| 
 Note:The information of which chips are the parity chips is unidentified.  | ||||||
| 
 MAINBOARD MEMORY  | ||
| 
 Size  | 
 SW1/1  | 
 SW1/2  | 
| 
 64KB  | 
 On  | 
 On  | 
| 
 128KB  | 
 On  | 
 Off  | 
| 
 256KB  | 
 Off  | 
 On  | 
| 
 320KB  | 
 Off  | 
 Off  | 
| 
 SERIAL PORT INTERRUPT  | ||
| 
 Setting  | 
 SW1/4  | 
 SW1/5  | 
| 
 IRQ3  | 
 Off  | 
 On  | 
| 
 IRQ4  | 
 On  | 
 Off  |