RB8506 -- Parallel Interface
Purpose
Provide digital inputs and outputs.
Description
Module RB8506 is a (dual) parallel interface. Internally the module may contain Motorola Peripheral Interface Adapter MC6821 (Pia) ICs or Rockwell Versatile Interface Adapater R6522 (Via) ICs or a combination of both.
The following variations of this module are known to exist:
- dual with two Pia's
- dual with a Pia and a Via
- dual with two Via's
- single Pia (small front)
Note that you should open each Pia/Via in a Parallel Interface module separately.
Configuration
The RB8506 parallel interface module has no properties that are configured at production time.
Default configuration
rb8506_pia "name1" { address = 0x90 }
rb8506_via "name2" { address = 0x90 }
When the Rulbus configuration file is read, the parallel interface ports are left unchanged.

Modules | |
| RB8506 PPORT Close | |
| close the parallel interface specified by handle. | |
| RB8506 PPORT Get Line Dir | |
| get peripheral line-direction, or active edge (C1) setting. | |
| RB8506 PPORT Get Line Level | |
| get peripheral line level. | |
| RB8506 PPORT Get Port Data | |
| get peripheral port data. | |
| RB8506 PPORT Get Port Dir | |
| get peripheral port data-direction setting. | |
| RB8506 PPORT Open | |
| open a parallel interface. | |
| RB8506 PPORT Set Line Dir | |
| set peripheral line-direction, or active adge (C1). | |
| RB8506 PPORT Set Line Level | |
| set peripheral line-level. | |
| RB8506 PPORT Set Port Data | |
| set peripheral port data. | |
| RB8506 PPORT Set Port Dir | |
| set peripheral port data-direction. | |
| RB8506 PPORT TEST Line | |
| test the parallel interface line VIs. | |
| RB8506 PPORT TEST Port | |
| test the parallel interface port VIs. | |