Commodore 1570 User Manual page 7

CHAPTER 7: DIRECT ACCESS COMMANDS ............•.............•. 67
a tool for advanced users ......................................•. 67
opening a data channel for direct access ........................... 67
block-read .................................................... 68
block-write ..........•....••..••..•...•............•.....•..... 69
the original block-read and block-write commands (expert users) ...... 70
the buffer pointer .............................................. 71
allocating blocks ...................•..•..................•..•.. 72
freeing blocks .....•...•..........•.........•............•..... 73
using random files (advanced users) ............................... 73
CHAPTER 8: INTERNAL DISK COMMANDS ............................ 74
memory-read ....•.......•...•.............•................... 75
memory-write ................................................. 76
memory-execute ..•...•••.........••..•..................••.... 77
block-execute .................................................. 78
user commands .•...•.............•...•...•...............•..•. 79
utility loader .................................................. 80
CHAPTER 9: MACHINE LANGUAGE PROGRAMS ....................... 81
disk-related kernal subroutines .................................. 81
CHAPTER 10: BURST COMMANDS .•......•..•........................ 82
read ......................................................... 82
write .•...•..................•...............•................ 83
inquire disk .....•............•...•............................ 83
format MFM ................................................•. 84
format GCR (no directory) ...................................... 85
sector interleave .................................•............. 85
query disk format ....................................•......... 86
inquire status ..................................•........•...... 86
chgutl utility .................................................. 87
fastload utility ................................................. 87
status byte breakdown .......................................... 88
burst transfer protocol. .........•..•..........................•. 89
explanation of procedures ...•...•..•..••......................•. 90
example burst routines ..............•.........................•. 91
APPENDICES:
A: changing the device number .................................. 98
B: dos error messages .............•...............•............ 99
C: diskette formats: GCRfMFM .....•..••.................... ' ... 103
D: disk command quick reference chart .................•.......• 112
E: specifications of the 1571 disk drive ...•...•................... 114
F: serial interface information ..•............................... 116
G: disk operating systems: Commodore and CP/M ............•.... 118
USER'S MANUAL STATEMENT ........................... inside back cover