Mitsubishi Electric Apricot LS Pro, Техническое описание оборудования

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Chapter 4
Chapter 6
Memory and I/O Usage
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
LS PRO HARDWARE TECHNICAL REFERENCE 5/17
Business audio
The Apricot business audio subsystem occupies a block of 8 ports from 0388h to 038Fh.
Port Function
0388-038B reserved
038C Address
038D channel 0 data
038E reserved
038F channel 1 data
The following descriptions are brief outlines of the function of the ports. A full
description is given in the manufacturers data sheet.
Address Write
When written to the address port acts as an index to the data ports for channels 0 and
1. The value written to 038Ch is a pointer to a location accessed at 038Dh or 038Fh.
Read
When read the address port returns status information.
Data ports Each channel has a data port associated with it. The ports provide access to a
group of locations. The address port is used to index these locations.
Floppy disk controller
The floppy disk controller has a variety of registers which return status information and
provide control over its operation.
Port (Hex) R/W Function
03F2 R/W Digital output register
03F4 R Main status register
03F5 R/W Data register
03F7 R Fixed/floppy digital input register
03F7 W Data rate select
A full description of the operation of the floppy controller is given in the manufacturers
data sheet.