Difference between revisions of "83Plus:Ports:09"
From WikiTI
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=== Read Values === | === Read Values === | ||
* Bit 0: Set if an interrupt was generated by recieving a byte. | * Bit 0: Set if an interrupt was generated by recieving a byte. | ||
| − | * Bit 1: | + | * Bit 1: Set if an interrupt was generated when a byte can be sent. |
* Bit 2: ''unknown'' | * Bit 2: ''unknown'' | ||
* Bit 3: Set if the assist is currently receiving data | * Bit 3: Set if the assist is currently receiving data | ||
Revision as of 23:21, 19 August 2005
Synopsis
Port Number: 09h
Function: Link Assist Status
This port gives information on the status of the hardware link assist.
Read Values
- Bit 0: Set if an interrupt was generated by recieving a byte.
- Bit 1: Set if an interrupt was generated when a byte can be sent.
- Bit 2: unknown
- Bit 3: Set if the assist is currently receiving data
- Bit 4: Set if the assist has read a complete byte (which can be read from port 0A)
- Bit 5: Set if the assist is ready to write data (via port 0D)
- Bit 6: Set if there was an error during transmission
- Bit 7: unknown
Write Values
None
Comments
This port only exists on the 83+ SE and the 84+.
Credits and Contributions
- Michael Vincent: Original documentation of the link assist
