83Plus:BCALLs:50FB

Synopsis

Unofficial Name: GetVarCmdUSB

BCALL Address: 50FB

Sends a silent link request to another calculator and receives a variable to RAM via USB or link port.

Inputs

• OP1: type and name of variable to request (must be zero'd out)
• (sndRecState): 15h
• iy+1Bh set up accordingly
• 0,(iy+1Bh) must be set to receive from USB, reset to receive from link port

Outputs

• None

Destroys

• All

Comments

This BCALL will not throw any errors if problems are encountered.

It is basically the same as GetVarCmd, but if 0,(iy+1Bh) is set, it will attempt to use the USB port first. If that transfer fails or the flag is reset, it will fall back to the link port.