Quartus® II support for a predefined language environment and file I/O is described below. Section numbers match those in both the IEEE Std 1076-1987 and the IEEE Std 1076-1993 versions of the IEEE Standard VHDL Language Reference Manual.
| Section | VHDL Construct | VHDL 1987 Support Note (1) | VHDL 1993 Support Note (1) |
|---|---|---|---|
| 14.1 | Predefined Attributes | Supported except for 'ACTIVE, 'DELAYED, 'LAST_ACTIVE, 'LAST_EVENT, 'LAST_VALUE, 'QUIET, 'STABLE, and 'TRANSACTION. |
Supported except for 'ACTIVE, 'DELAYED, 'LAST_ACTIVE, 'LAST_EVENT, 'LAST_VALUE, 'QUIET, 'STABLE, and 'TRANSACTION. |
| 14.2 | Package STANDARD |
Supported. | Supported. |
| 14.3 | Package TEXTIO |
Supported. File I/O cannot be synthesized; therefore, calls to TEXTIO functions are ignored. |
Supported. File I/O cannot be synthesized; therefore, calls to TEXTIO functions are ignored. |
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