DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual page 175

DIGITAL-LOGIC AG
I/O Ad- Read/Write
dress Status
I/O addresses 02F8h - 02FFh are reserved for use with serial port 2. See the bit defini-
tions for I/O addresses 03F8h - 03FFh.
02F8h W
02F8h R
02F8h R / W
02F9h R / W
02F9h R / W
02FAh R
02FBh R / W
02FCh R / W
02FDh R
02FEh R
02FFh R / W
0300h – R / W
031Fh
I/O addresses 0372h - 0377h are reserved for use with a secondary diskette controller.
See the bit definitions for 03F2h - 03F7h.
0372h W
0374h R
0375h R / W
0376h R / W
0377h R
0377h W
0378h R / W
0379h R / W
Description
Transmitter holding register for serial port 2
Receive buffer register for serial port 2
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 2
Line control register for serial port 2
Modem control register for serial port 2
Line status register for serial port 2
Modem status register for serial port 2
Scratch register for serial port 2 (used for diagnostics)
ISA- LAN controller, if installed
(otherwise is free for the user)
Digital output register for secondary diskette drive control-
ler
Status register for secondary diskette drive controller
Data register for secondary diskette drive controller
Control register for secondary diskette drive controller
Digital input register for secondary diskette drive controller
Select register for secondary diskette data transfer rate
Data port for parallel port 1
bit 7 = 0 Busy
bit 6 = 0 Acknowledge
bit 5 = 1 Out of paper
bit 4 = 1 Printer is selected
bit 3 = 0 Error
bit 2 = 0 IRQ has occurred
bit 1-0 = Reserved
Status port for parallel port 1
bit 7 = 0 Busy
bit 6 = 0 Acknowledge
bit 5 = 1 Out of paper
bit 4 = 1 Printer is selected
bit 3 = 0 Error
bit 2 = 0 IRQ has occurred
bit 1-0 = Reserved
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MSM586SEN/SEV Manual V1.5E
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