# HG changeset patch # User roug # Date 1018082872 0 # Node ID 39077ffa964df05f31d9db20c9c7e53f6e52ebf0 # Parent 6b140c61492c75420e0415fb37a423bed42d76fb Appendix B reconstructed. (Probably the least useful information in the book) diff -r 6b140c61492c -r 39077ffa964d docs/os9sysprog/os9sysprog.docbook --- a/docs/os9sysprog/os9sysprog.docbook Sat Apr 06 06:09:47 2002 +0000 +++ b/docs/os9sysprog/os9sysprog.docbook Sat Apr 06 08:47:52 2002 +0000 @@ -4495,7 +4495,396 @@ Standard Floppy Disk Formats -These did not scan well + +Single Density Floppy Disk Format + + + + + + + SIZE + 5" + 8" + + + DENSITY + SINGLE + SINGLE + + + #TRACKS + 35 + 77 + + + #SECTORS/TRACK + 10 + 16 + + + BYTES/TRACK (UNFORMATTED) + 3125 + 5208 + + + + + + + + + + + + FORMAT FIELD + #BYTES (DEC) + VALUE (HEX) + #BYTES (DEC) + VALUE (HEX) + + + + + HEADER (ONCE PER TRACK) + 30 + FF + 30 + FF + + + 6 + 00 + 6 + 00 + + + 1 + FC + 1 + FC + + + 12 + FF + 12 + FF + + + SECTOR (REPEATED N TIMES) + 6 + 00 + 6 + 00 + + + 1 + FE + 1 + FE + + + 1 + (TRK #) + 1 + (TRK #) + + + 1 + (SIDE #) + 1 + (SIDE #) + + + 1 + (SECT #) + 1 + (SECT #) + + + 1 + (BYTCNT) + 1 + (BYTCNT) + + + 2 + (CRC) + 2 + (CRC) + + + 10 + FF + 10 + FF + + + 6 + 00 + 6 + 00 + + + 1 + FB + 1 + FB + + + 256 + (DATA) + 256 + (DATA) + + + 2 + (CRC) + 2 + (CRC) + + + 10 + FF + 10 + FF + + + TRAILER (ONCE PER TRACK) + 96 + FF + 391 + FF + + + + + + + + + + BYTES/SECTOR (FORMATTED) + 256 + 256 + + + BYTES/TRACK (FORMATTED) + 2560 + 4096 + + + BYTES/DISK (FORMATTED) + 89,600 + 315,392 + + + +
+ +Double Density Floppy Disk Format + + + + + + + SIZE + 5" + 8" + + + DENSITY + DOUBLE + DOUBLE + + + #TRACKS + 35 + 77 + + + #SECTORS/TRACK + 16 + 28 + + + BYTES/TRACK (UNFORMATTED) + 6250 + 10,416 + + + + + + + + + + + + FORMAT FIELD + #BYTES (DEC) + VALUE (HEX) + #BYTES (DEC) + VALUE (HEX) + + + + + HEADER (ONCE PER TRACK) + 80 + 4E + 80 + 4E + + + 12 + 00 + 12 + 00 + + + 3 + F5 (A1) + 3 + F5 + + + 1 + FC + 1 + FC + + + 32 + 4E + 32 + 4E + + + SECTOR (REPEATED N TIMES) + 12 + 00 + 12 + 00 + + + 3 + F5 (A1) + 3 + F5 + + + 1 + FE + 1 + FE + + + 1 + (TRK #) + 1 + (TRK #) + + + 1 + (SIDE #) + 1 + (SIDE #) + + + 1 + (SECT #) + 1 + (SECT #) + + + 1 + (BYTCNT) + 1 + (BYTCNT) + + + 2 + (CRC) + 2 + (CRC) + + + 22 + 4E + 22 + 4E + + + 12 + 00 + 12 + 00 + + + 3 + F5 (A1) + 3 + F5 (A1) + + + 1 + FB + 1 + FB + + + 256 + (DATA) + 256 + (DATA) + + + 2 + (CRC) + 2 + (CRC) + + + 22 + 4E + 22 + 4E + + + TRAILER (ONCE PER TRACK) + 682 + 4E + 768 + 4E + + + + + + + + + + BYTES/SECTOR (FORMATTED) + 256 + 256 + + + BYTES/TRACK (FORMATTED) + 4096 + 7168 + + + BYTES/DISK (FORMATTED) + 141,824 + 548,864 + + + +