ELITE SERIES USER MANUAL
APPEN. A - DISK I/O
For example, if the sector number found on a
disk were a 2, this is used as an offset into a
table where the number $0B is found. Thus DOS
treats the physical sector 2 as sector 11 ($0B),
presenting no problem If RWTS is used for disk
access.
To eliminate access differences between reading
and booting files, DOS is actually loaded back-
wards into memory in descending sequential order
during booting, just as files are accessed.
Thus, one interleaving cuts disk access time.
DOS, CP/M, and Pascal diskettes all use software
interleaving though each uses a different sector
order. The figure below gives the standard in-
terleave tables for each operating system.
For the dual headed Elite Two and Three drives,
the sector interleaving tables within the
Rana enhanced operating systems are extended to
a full 32 sectors. This is due to the fact that
the enhanced operating systems treat each
cylinder as a single track, with sectors 0-15 on
the first side (or first true track) and sectors
16—31 on the second side (or second true track).
Due to the way in which the Rana dual headed
diskette formatting utilities operate, it is not
sensible to interleave sectors between the two
sides of the diskette. Therefore the sectors on
the first side are interleaved with themselves,
and the sectors on the second side are inter-
leaved with themselves.
P a g e A - 4 2
Содержание Elite Controller
Страница 1: ...RanaSystems EliteSeries User Manual...
Страница 19: ...ELITE SERIES USER MANUAL INSTALLATION This page intentional1y left blank Page 1 6...
Страница 67: ...ELITE SERIES USER MANUAL DOS ENHANCEMENTS This page intentionally left blank Page 3 42...
Страница 142: ...ELITE SERIES USER MANUAL SECTION 5 5 SECTION 5 This section has been intentionally omitted Page 5 1...
Страница 143: ...ELITE SERIES USER MANUAL SECTION 5 This page intentionally left blank Page 5 2...
Страница 153: ...ELITE SERIES USER MANUAL SPECIFICATIONS Fig 6 8 Physical Dimensions of Elite Drives Page 6 10...
Страница 154: ...ELITE SERIES USER MANUAL SPECIFICATIONS Fig 6 9 Elite Controller Physical Dimensions Page 6 11...
Страница 163: ...ELITE SERIES USER MANUAL SPECIFICATIONS This page intentionally left blank Page 6 20...
Страница 165: ...ELITE SERIES USER MANUAL THEORY OF OPERATION This page intentionally left blank Page 7 2...
Страница 189: ...ELITE SERIES USER MANUAL THEORY OF OPERATION This page intentionally left blank Page 7 26...
Страница 231: ...ELITE SERIES USER MANUAL ENHANCED DOS UTIL This page intentionally left blank Page 9 34...
Страница 270: ...ELITE SERIES USER MANUAL SECTION 11 11 SECTION 11 This section has been intentionally omitted Page 11 1...
Страница 271: ...ELITE SERIES USER MANUAL SECTION 11 This page intentionally left blank Page 11 2...
Страница 273: ...ELITE SERIES USER MANUAL APPEN A DISK I O This page intentionally left blank Page A 2...
Страница 282: ...ELITE SERIES USER MANUAL APPEN A DISK I O Fig A I FM Recording Pattern Page A 11...
Страница 283: ...ELITE SERIES USER MANUAL APPEN A DISK I O Fig A 2 FM Bit Cell Page A 12...
Страница 284: ...Fig A 3 FM Byte Recording Page A 13 ELITE SERIES USER MANUAL APPEN A DISK I O DATA BITS CLOCK BITS...
Страница 285: ...ELITE SERIES USER MANUAL APPEN A DISK I O CONTROLLER SHIFT REGISTER DATA ON DISK Fig A 4 Reading Data Page A 14...
Страница 287: ...ELITE SERIES USER MANUAL APPEN A DISK I O Fig A 5 Writing Data Page A 16 CONTROLLER SHIFT REGISTER DATA ON DISK...
Страница 289: ...ELITE SERIES USER MANUAL APPEN A DISK I O Fig A 6 Track Fomatting Page A 18...
Страница 310: ...ELITE SERIES USER MANUAL APPEN A DISK I O Fig A 19 6 plus 2 Encoding Page A 39 800 900 956...
Страница 315: ...ELITE SERIES USER MANUAL APPEN A DISK I O This page intentionally left blank Page A 44...
Страница 321: ...ELITE SERIES USER MANUAL APPEN B DOS NOTES This page intentionally left blank Page B 6...
Страница 328: ...ELITE SERIES USER MANUAL APPEN D D APPENDIX D This appendix section has been intentionally omitted Page D 1...