|Re: HP-42S Emulator??|
Message #9 Posted by Vieira, Luiz C. (Brazil) on 23 July 2003, 11:40 p.m.,
in response to message #8 by Richard Garner
Hi Richard, guys;
Maybe you already know about what's written below, but it is always worth posting, right?
There is a time-consumming procedure that requires an HP42S as a source and any HP48 with INPRT program. Unfortunately this requires a lot of key pressing.
Based on the excelent Craig Finset's database, if you press [ON][LOG] and [<-] you get into standard Pioneers' memory browser/scanner (if I am not wrong, all printing capable Pioneers have it: HP17B/BII, HP27S and HP42S). Then you move the pointer to address 00000 and go pressing [COS] as many times as you can afford. Each time [COS] is pressed, data shown in the display (16 nybbles, or 8 bytes) is sent through the IR port. Any HP48 running INPRT will collect this IR sequence and "convert" it to a valid binary stream sequence. If you "upload" ROM contents in separate strings, the HP48 can be used to concatenate them or you can "join" them together after copying them all to a PC. The last ROM byte is the one at address # 1FFFFh.
As I said, it is a time consumming task. But it is not too hard to find resources to accomplish it. Now, about available time...
Edited: 23 July 2003, 11:40 p.m.