Chapter 1
Chapter 2
Chapter 6
Contents
Chapter 3
Chapter 5
System Board
Chapter 3
LS PRO HARDWARE TECHNICAL REFERENCE 3/21
3.12
APRICOT BUSINESS AUDIO
The Apricot Business Audio subsystem integrated on the LS Pro system board
is based on a Yamaha YMZ263 chip. It offers two channels each of which can
be independently configured to either playback or record.
Each channel incorporates a PCM/ADPCM encoder/decoder, 12-bit ADC and
DAC and a 128 byte FIFO. In PCM mode the maximum sample rate is 44.1kHz,
in ADPCM it is 22.05kHz.
The digital audio subsystem uses DMA channel 1 to transfer data to and from
audio channel 0 and DMA channel 3 for audio channel 1.
The YMZ263 occupies a block of eight ports from 388-38Fh. A description of
the operation of this block of ports is included section 5.
3.13
SYSTEM BOARD CONNECTORS
Hard disk drive connectors
Control Connector
Pin
Function
Pin
Function
1
host reset-
21
-
2
ground
22
ground
3
host data 7
23
host IOW-
4
host data 8
24
ground
5
host data 6
25
host IOR-
6
host data 9
26
ground
7
host data 5
27
host I/O channel ready-
8
host data 10
28
-
9
host data 4
29
reserved
10
host data 11
30
ground
11
host data 3
31
host IRQ14
12
host data 12
32
host IOCS16-
13
host data 2
33
host ADDR1
14
host data 13
34
-
15
host data 1
35
host ADDR0
16
host data 14
36
host ADDR2
17
host data 0
37
-
18
host data 15
38
-
19
ground
39
-
20
key
40
ground
The pin layout of the connector.
2
1
40
39
Summary of Contents for Apricot LS Pro
Page 1: ...apricot HARDWARE TECHNICAL REFERENCE MITSUBISHI ELECTRIC LS Pro ...
Page 2: ...HARDWARE TECHNICAL REFERENCE ...
Page 6: ...CONTENTS ...
Page 9: ...Chapter 1 INTRODUCTION ...
Page 14: ...Chapter 2 SYSTEM UNIT ...
Page 37: ...Chapter 3 SYSTEM BOARD ...
Page 60: ...Chapter 4 PERIPHERAL ITEMS ...
Page 91: ...Chapter 5 MEMORY AND I O USAGE ...
Page 118: ...Appendix A SPECIFICATIONS ...
Page 125: ...Appendix B REVISION C SYSTEM BOARD ...
Page 130: ...ERROR BEEP CODES Appendix C ...
Page 134: ...INDEX ...
