Quantum FIREBALL PLUS AS 10.2 - Write Buffer

ATA Bus Interface and ATA Commands
6-62 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
6.7.23
6.7.236.7.23
6.7.23 WRITE BUFFER
WRITE BUFFERWRITE BUFFER
WRITE BUFFER
COMMAND CODE – E8h
DESCRIPTION – The WRITE BUFFER command enables the host to write to the
drive's sector buffer. When the host issues this command, the drive sets BSY, sets
up the sector buffer for a write operation, sets DRQ, clears BSY, and generates an
interrupt. The host then writes up to 512 bytes of data to the buffer.
INPUTS
OUTPUTS
Register
RegisterRegister
Register 7
77
76
66
65
55
54
44
43
33
32
22
21
11
10
00
0
Features na
Sector Count na
Sector Number na
Cylinder Low na
Cylinder High na
Device/ Head obs na obs DEV na
Command E8h
Register
RegisterRegister
Register 7
77
76
66
65
55
54
44
43
33
32
22
21
11
10
00
0
Error nananananaABRTnana
Sector Count na
Sector Number na
Cylinder Low na
Cylinder High na
Device/ Head obsnaobsDEVnananana
Status BSY DRDY DF na DRQ na na ERR