CURSOR and Commodore cassettes

Doug Spence wrote: About a year ago, I transfered the first 15 or so CURSOR tapes to Commodore disk for Larry Anderson to put up on his BBS. I did it in a hurry and didn't keep a copy of the disks. You can ask him for a copy or I can try to "dig" the box of CURSOR tape out of which ever pile it wound up in. If I can find the tape, I can transfer it to the pc on the little C64 dev station I set up at work. Let me know. Doug Spence wrote: About a year and a half ago, I took my shot at converting wave files. Unfortunately I had to move on to other projects just as I was making progress. First, IMHO if you are sampling at less than 44.1, you are making things too hard on yourself. I did find the format of the header in a book and now I can't remember which book it was, but I'm fairly certain it was a PET book. I started with a test program consisting of: 10 REM ABCDEFGHIJKLMNOPQRSTUVWXYZ Then I wrote a C program to measure pulses from "bottom to bottom". Analyzing the data, I choose 15 samples as the difference between small pulse and a large one. 15 or less was small and 16 or greater was a large. Yes, this is a sync bit at the start of ever byte. Watching for this will tell you when the data begins. Below I have copied the begining of the last test output I ran. First there is a row of pulse lengths (in samples) (20 17 17 14 14 17 14 17 17 12 14 17 13 16 13 16 16 14 13 17) Then there is a row where zero is a "small pulse", 1 is a "large" pulse. ( 1 1 1 0 0 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 ) With that information, I determine the byte like this: * the first two pulses are 1 and 1 - this is the sync bit. * the next two pulses are the low order bit * a 1 followed by a 0 is a 1 * a 0 followed by a 1 is a 0 * and the last two pulses is the parity bit So in the first line of data: 1 1 1 0 0 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 represents hex 89. This is just a small portion of the output file. It shows the header up to and including the filename (TEST1). If you want, I can sent you the rest of this file off list. ; ; Cassette Tape Analysis of c6444812.wav Created 09/11/97 ; Silence............for 0x0024F2 bytes at byte count 0x000024F3 Reading leader....... Silence............for 0x001C77 bytes at byte count 0x00004296 Reading leader....... Leader = 27136 Reading data....... 20 17 17 14 14 17 14 17 17 12 14 17 13 16 13 16 16 14 13 17 1 1 1 0 0 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 89 20 16 14 17 14 17 14 17 16 13 13 17 13 16 13 16 16 13 16 14 1 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 1 0 88 20 16 17 14 17 14 16 13 13 16 13 16 13 16 13 16 16 14 17 14 1 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 87 20 16 13 17 17 13 16 13 13 15 13 16 13 16 13 16 16 13 13 17 1 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 1 0 0 1 86 20 16 17 14 14 17 17 13 12 16 13 16 13 16 13 16 17 13 13 17 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 1 0 0 1 85 20 16 14 17 13 16 17 13 13 16 14 16 13 16 13 16 16 14 17 14 1 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 1 0 1 0 84 19 17 17 14 16 14 13 16 13 16 14 16 13 16 13 17 16 13 13 17 1 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 0 1 83 20 16 14 17 17 13 13 17 14 16 13 16 13 16 14 17 17 14 16 13 1 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 82 19 16 17 14 13 16 14 16 14 16 13 17 13 16 13 17 16 13 16 14 1 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 81 19 17 17 13 13 17 14 17 13 16 13 16 13 16 13 16 13 16 13 16 1 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 01 20 17 17 14 14 17 14 17 14 16 13 16 13 16 13 16 13 16 13 16 1 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 01 20 17 14 17 15 17 14 17 16 13 13 16 13 16 13 16 13 16 13 16 1 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 08 20 16 17 15 17 13 13 16 13 16 13 16 16 13 13 16 13 16 13 16 1 1 1 0 1 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 23 # 20 16 14 17 14 16 13 16 17 13 13 16 14 16 13 16 13 16 13 16 1 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 08 19 16 14 17 14 17 17 13 13 16 16 13 13 16 17 14 13 17 14 16 1 1 0 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 54 T 19 16 17 15 13 17 16 13 13 16 13 16 13 16 16 14 13 17 14 17 1 1 1 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 0 1 45 E 20 17 17 14 17 14 13 17 13 17 16 13 13 16 16 13 13 17 17 14 1 1 1 0 1 0 0 1 0 1 1 0 0 1 1 0 0 1 1 0 53 S 20 16 14 17 14 16 17 13 13 17 16 13 13 16 16 14 13 17 13 16 1 1 0 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 54 T 19 16 17 14 13 17 14 16 13 16 16 13 17 14 14 16 13 16 13 16 1 1 1 0 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 31 1 19 16 14 17 15 17 13 16 13 16 13 16 16 13 13 16 14 17 14 17 1 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 20 I hope this helps, --Doug ==================================================== Doug Coward dcoward(a)pressstart.com (work) Sr. Software Eng. mranalog(a)home.com (home) Press Start Inc. http://www.pressstart.com Sunnyvale,CA Curator Museum of Personal Computing Machinery http://www.best.com/~dcoward/museum/ and the new Analog Computer Museum and History Center http://www.best.com/~dcoward/analog ====================================================