Appendix B
Genesis MP
74
◆
CD ROM Drive
Genesis MP has CD-ROM drive, that supports worldwide stan-
dards and specifications for CD-ROM and CD-digital audio discs.
This drive can read CD-ROM, CD-XA, CD-I, PhotoCD Discs, and
Standard CD Audio Discs
The CD-ROM drive features a quad-speed mechanism that sup-
ports sustained data transfer rates of 600 KB per second and a
data buffer to further enhance performance.
The Floppy Disk Drive
Genesis MP has one internal high-density floppy disk drive. This
drive is connected to a 20-pin connector. The table lists the Floppy
Disk Connector pin assignments.
Floppy Disk Connector Pin Assignments
Pin Signal Name
Signal Description
1
GND
Ground
2
PH0
Phase 0: state control line
3
GND
Ground
4
PH1
Phase 1: state control line
5
GND
Ground
6
PH2
Phase 2: state control line
7
GND
Ground
8
PH3
Phase 3: register write strobe
9
n.c.
Not Connected
10
/WRREQ
Write data request
11
+5V
+5 volts
12
SEL
Head select
13
+12V
+12 volts
14
/ENBL
Drive enable
15
+12V
+12 volts
16
RD
Read data
17
+12V
+12 volts
18
WR
Write data
19
+12V
+21 volts
20
n.c.
Not connected
