GENERAL SPECIFICATIONS
1. CHARACTERISTICS
3.5 inch, +800K storage
Increased buffers, fixed BAM locations
Expanded controller commands
Track cache buffer
Configurable auto boot file
User alterable physical/logical track and sector translation
Fully vectored jump table
Partition capabilities
Wild card enhancements
Standard, fast and burst serial capabilities
Expanded burst command set
2. HARDWARE SUMMARY
PROCESSOR:
ROM:
RAM:
I/O:
6502A, WD1770
32K
8K
8520A
3. SPECIFICATIONS
GROSS DATA ORGANIZATION:
3.5 Inch Disk
Double-Sided
80 Cylinders/160 Tracks
PER TRACK ORGANIZATION:
Hex 4E written as a gap, with 10 sectors of data, with full gaps written for motor speed variation.
PER SECTOR ORGANIZATION:
MFM Encoding
12 Bytes of Hex 00
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
1 Byte of Hex FE (ID Address Mark)
1 Byte (Track Number)
1 Byte (Side Number)
1 Byte (Sector Number)
1 Byte (Sector Length, 02 for 512 Byte Sectors)
2 Bytes CRC (Cyclic Redundancy Check)
22 Bytes of Hex 22
12 Bytes of Hex 00
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
1 Byte of Hex FB (Data Address Mark)
512 Bytes of Data
2 Bytes of CRC (Cyclic Redundancy Check)
38 Bytes of Hex 4E
This page has been created by
Frank Kontros
.
Last updated May 14th, 1999.