|Re: hp 82240A Printer - Sacrilege?|
Message #5 Posted by James M. Prange (Michigan) on 28 Dec 2007, 6:29 p.m.,
in response to message #1 by Tito de Magalhaes
For information on the IR signals needed to make the 82240A/B printers work, see the HP 82240B Infrared Printer Technical Interfacing Guide.
I expect that you'd probably have to build some custom hardware (and software) to make the printer work from a PC, or else use a connection from a PC to a calculator to tell the calculator to print to the 82240A/B.
The guide is written for the 82240B. For purposes of the signals the printers need, the differences are, first, that the 82240B has both the Roman 8 character set and the modified ECMA Latin No. 1 character set, but the 82240A has only the Roman 8 set, and the commands to switch character sets on the 82240B are ignored by the 82240A. Second, the 82240A will stay powered up for as long as it's turned on and power is available, but, when using only battery power, the 82240B will switch to a low-power mode after about ten minutes of inactivity; the input buffer and modes are preserved, but it won't receive IR.
Edited: 28 Dec 2007, 6:31 p.m.