Command Code:

cmdPAD_IO = 51

Input Packet:

0		1		2		3
address		2		cmdPAD_IO		SPX

SPX -

Index of scratch pad byte.

Output Packet:

0		1		2		3		4
address		3		cmdPAD_IO		SPX		DATA

SPX -	Index of scratch pad byte.
DATA -	Arbitrary data.

Description:

This command reads a byte of data from a RAM scratch pad.  The scratch pad is globally accessible by all reflexes and VM processes.  A scratch pad index that is out of range will generate an error message.

The reply packet is cmdPAD_IO, followed by the scratch pad index and retrieved data byte.

The second form of this command writes data to the scratch pad.  A scratch pad index that is out of range will generate an error message.  There is no reply packet.

See the discussion of Scratch Pad usage for more details.