Specifications

HOST SOFTWARE INTERFACE
6 – 37
COMMAND NAME COMMAND CODE PARAMETERS USED
b7 b6 b5 b4 b3 b2 b1 b0 F SC SN C SDH
Recalibrate 00 0 1 x x x x NNNN D
Read Sector(s) 001000Lx NYYY Y
Read DMA 1100100x NYYY Y
Write Sector(s) 001100Lx NYYY Y
Write DMA 1100101x NYYY Y
Write Verify Sector(s) 00111100 NYYY Y
Read Verify Sector(s) 0100000x NYYY Y
Format Track 01010000 NNNY Y
Seek 0111xxxx NNYY Y
Execute Diagnostic 10010000 NNNN D
Initialize Parameters 10010001 NYNN Y
Read Sector Buffer 11100100 NNNN D
Write Sector Buffer 11101000 NNNN D
Identify Drive 11101100 NNNN D
Set Features 11101111 YNNN D
Read Multiple 11000100 NYYY Y
Write Multiple 11000101 NYYY Y
Set Multiple Mode 11000110 NYNN D
KEY EXPLANATION
L Long bit
If L = 1, Read/Write Long commands are performed
If L = 0, normal Read/Write commands are performed
SC Sector count register
SN Sector number register
C Cylinder register
F Features register
SDH Drive/Head register
Y Indicates that the register contains a valid parameter for a cited command.
Within the Drive/Head register, Y indicates that both the drive and head
parameters are used.
D Signifies that the drive parameter, not the head parameter, is valid.
X Don't care
NNot required
Summary