[Last modified: 07-Feb-07] HP48 Speaker Design Library Bill McFadden billmc@rdrop.com This is a library speaker design equations for use with HP48GX or HP48SX calculators. The most current version can be found at: http://www.rdrop.com/users/billmc Speaker Design 3.6 files: README: This file READ_ME.txt: This file spkr.doc: Instructions for use spkr.doc.txt: Instructions for use spkr.txt: Loudspeakers tutorial spkr.rpl: RPL Source code BYTES #70F0h 8515 spkr.asc: ->ASC encoded binary BYTES #DFFDh 11522 (requires memory card to download on a 48SX) spkr.uu: Uuencoded binary (for unix systems) BYTES #DFFDh 11522 spkr48_3.6.shar: Unix shell archive of the above files. SPKR: Decoded binary (download in binary mode) BYTES #DFFDh 11522 bugs: A list of things I'd like to fix someday Download and installation You have several choices (from best to worst): A. download SPKR from the web connect a serial cable between your computer and HP48 calculator start kermit on your computer and set the file type to binary set your HP48 to binary transfer mode use kermit to transfer SPKR from the computer to your HP48 B. download spkr.uu from the web into a unix computer use uudecode to convert it to binary (the resulting file is named SPKR) connect a serial cable between your computer and HP48 calculator start kermit on your computer and set the file type to binary set your HP48 to binary transfer mode use kermit to transfer SPKR from the computer to your HP48 C. download spkr.asc from the web connect a serial cable between your computer and HP48 calculator start kermit on your computer and set the file type to text set your HP48 to ASCII transfer mode use kermit to transfer spkr.asc from the computer to your HP48 run the ASC-> utility in your HP48 to convert it to binary save the binary as SPKR D. download spkr.rpl from the web connect a serial cable between your computer and HP48 calculator start kermit on your computer and set the file type to text set your HP48 to ASCII transfer mode use kermit to transfer spkr.rpl from the computer to your HP48 save spkr.rpl in a variable named SPKR (this method is not recommended because it does not include the binary variable Mpar needed by the multiple equation solver) E. download spkr48_3.6.shar from the web into a unix computer type "sh spkr48_3.6.shar" to extract the individual files follow B, C, or D above for the file type you wish to use Once you have SPKR installed in your HP48, go to the SPKR directory and start the multiple equation solver. Next, follow the directions in spkr.doc. NOTES: Kermit is a free file transfer program available from: http://www.columbia.edu/kermit/ The ASC-> utility is available from: http://ftp.funet.fi/pub/misc/hp48sx/comms/asciiencod If you use ftp to transfer binaries (such as from a unix system to a PC), be sure to set ftp to binary mode first.