PS/2 Model 30 Mode
7
6
5
4
3
2
1
0
nDRV2 nDS1
nDS0 WDATA RDATA WGATE nDS3
nDS2
F/F
F/F
F/F
RESET
COND.
N/A
1
1
0
0
0
1
1
edge of RDATA and is cleared by the read of the
DIR register.
BIT 4 WRITE DATA
BIT 0 nDRIVE SELECT 2
The DS2 disk interface is not supported. (Always
1)
Active high status of the latched WDATA output
signal. This bit is latched by the inactive going
edge of WDATA and is cleared by the read of the
DIR register. This bit is not gated with WGATE.
BIT 1 nDRIVE SELECT 3
The DS3 disk interface is not supported. (Always
1)
BIT 5 nDRIVE SELECT 0
BIT 2 WRITE GATE
Active low status of the DS0 disk interface output.
Active high status of the latched WGATE output
signal. This bit is latched by the active going edge
of WGATE and is cleared by the read of the DIR
register.
BIT 6 nDRIVE SELECT 1
Active low status of the DS1 disk interface output.
BIT 3 READ DATA
BIT 7 nDRV2
Active high status of the latched RDATA output
signal. This bit is latched by the inactive going
Active low status of the DRV2 disk interface input,
this is not supported. (Always 1).
19
SMSC [ SMSC CORPORATION ]
