Port Number: 0Ah
Function: Link Assist Input Buffer/CPU Speed 1 Signaling Rate
This port allows you to read the data that has been received by the link assist.
- [00h - FFh]: Byte currently in the link assist's buffer.
Writing controls the signaling rate of the link assist in CPU speed mode 1. See port 09 for details.
This port only exists on the 83+ SE and the 84+.
Check port 9 before you read this port, to see that there is valid data. Also, do not read this port more than once per data byte received.
GetByteSE: in a,(4) and 8 jr z,LinkError in a,(9) bit 6,a jr nz,LinkError and 11h jr z,GetByteSE in a,(0Ah) ret
Credits and Contributions
- Michael Vincent: Original documentation of the link assist