83Plus:Ports:0A

Synopsis

Port Number: 0Ah

Function: Link Assist Input Buffer

This port allows you to read the data that has been received by the link assist.

Read Values

• [00h - FFh]: Byte currently in the link assist's buffer.

Write Values

None

Comments

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.

Example

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