DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual page 58

DIGITAL-LOGIC AG
I/O Ad- Read/Write
dress Status
01F6h R / W
01F7h R
01F7h W
0200h - R / W
020Fh
0201h R / W
0220h – R / W
022Fh
I/O addresses 0278h - 027Ah are reserved for use with parallel port 2. See the bit defi-
nitions for addresses 0378h - 037Ah.
0278h R / W
0279h R
0279h W
027Ah R / W
02B0h – R / W
02BFh
I/O addresses 02E8h - 02EFh are reserved for use with serial port 4. See the bit defini-
tions for I/O addresses 03F8h - 03FFh.
02E8h W
02E8h R
02E8h R / W
02E9h R / W
02E9h R / W
02EAh R
02EBh R / W
02ECh R / W
02EDh R
02EEh R
02EFh R / W
Description
Drive/Head register for hard drive 0
bit 7 = 1
bit 6 = 0
bit 5 = 1
bit 4 = Drive select
0 First hard drive
1 Second hard drive
bits 3-0 = Head select bits
Status register for hard drive 0
bit 7 = 1 Controller is executing a command
bit 6 = 1 Drive is ready
bit 5 = 1 Write fault
bit 4 = 1 Seek operation complete
bit 3 = 1 Sector buffer requires servicing
bit 2 = 1 Disk data read completed successfully
bit 1 = Index (is set to 1 at each disk revolution)
bit 0 = 1 Previous command ended with error
Command register for hard drive 0
Game controller ports
I/O data - game port
Soundport AD1816 reserved
Data port for parallel port 2
Status port for parallel port 2
PnP Adress register (only for PnP devices)
Control port for parallel port 2
Digital I/O for Latch, WDOG, Control
Transmitter holding register for serial port 4
Receive buffer register for serial port 4
Baud rate divisor (low byte) when DLAB = 1
Baud rate divisor ( high byte) when DLAB = 1
Interrupt enable register when DLAB = 0
Interrupt identification register for serial port 4
Line control register for serial port 4
Modem control register for serial port 4
Line status register for serial port 4
Modem status register for serial port 4
Scratch register for serial port 4 (used for diagnostics)
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MSM586SEN/SEV Manual V1.5E
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