W83759A
CRX89h (PD0TIM1)
Bit 7 Bit 6
Read/Write
Bit 5
Primary Drive0 Timing Control 1
Bit 4
Bit 3
Bit 2
Bit 1
PD0RDY
Bit 0
PD0AST1 PD0AST0 PD0DHT1 PD0DHT0
PD0ADV
PD0PRE
PD0DMA
PD0 Data Register Port (1F0h) Address Setup Time
Read/Write extra address setup time (clocks)
Bit 7- Bit 6
PD0AST1- 0
00
01
10
11
0
2
2
3
PD0 Data Register Port (1F0h) Data Hold Time
Read/Write extra data hold time (clocks)
Bit 5- Bit 4
PD0DHT1- 0
00
01
10
11
0
2
2
3
Bit 3
Bit 2
Bit 1
Bit 0
Prefetch/Post write control
PD0PRE
PD0DMA
0
1
Prefetch/Post write enabled
Prefetch/Post write disabled
PD0 DMA mode control
0
1
DMA mode enabled
DMA mode disabled
PD0 Data Register Port (1F0h) IOCHRDY Control
PD0RDY
PD0ADV
0
1
IOCHRDY enabled
IOCHRDY disabled
PD0 Data Register Port (1F0h) Advanced Timing
Enable
0
Normal timing (depends on SP1, MD1, MD0
setting)
1
Advanced timing (depends on PD0TIM1- 0
setting)
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