315-5309: Difference between revisions

Revision as of 02:33, 8 January 2013

The 315-5309 is found on early revision of the MegaDrive I.

It handle the IO port and the version register

OpenOffice Draw file : File:315-5309.odg

Address Buses
A0-A23	M68K Address Bus
ZA0-ZA15	Z80 Address bus
Data Buses
D0-D15	M68K Data bus
ZD0-ZD7	Z80 Data bus
IO port lines
EM1X	Port 1 lines
EM2X	Port 2 lines
EM3X	Port 3 lines
Control lines
/CAS0	Active low, read on $000000-$DFFFFF region
/DISK	0V Expansion Unit connected
FREQ	5V = 60Hz, 0V = 50Hz
/FRES
LANG	5V = English, 0V = Japanese
/LWR	Lower byte WRite
/M3	Mark III compatibility mode
Clock lines
VCLK	68K clock

@@ Line 11: / Line 11: @@
 OpenOffice Draw file : [[File:315-5309.odg]]
-*IOX_X: To the DE-9 port
+==Signals==
-*FREQ: +5V = 60Hz, 0V = 50Hz
-*LANG: +5V = English, 0V = Japanese
+{|class="regdef"
-*A0-A6: 68K address bus
+|style="background-color:#ff00ff" colspan="2"|Address Buses
-*D0-D15: 68K data bus
+|-
-*ZA0-ZA7: Z80 address bus
+|A0-A23
-*ZD0-ZD7: Z80 data bus
+|M68K Address Bus
+|-
+|ZA0-ZA15
+|Z80 Address bus
+|-
+|style="background-color:#ffff00" colspan="2"|Data Buses
+|-
+|D0-D15
+|M68K Data bus
+|-
+|ZD0-ZD7
+|Z80 Data bus
+|-
+|style="background-color:#00ff00" colspan="2"|IO port lines
+|-
+|EM1X
+|Port 1 lines
+|-
+|EM2X
+|Port 2 lines
+|-
+|EM3X
+|Port 3 lines
+|-
+|style="background-color:#00ffff" colspan="2"|Control lines
+|-
+|/CAS0
+|Active low, read on $000000-$DFFFFF region
+|-
+|/DISK
+|0V Expansion Unit connected
+|-
+|FREQ
+|5V = 60Hz, 0V = 50Hz
+|-
+|/FRES
+|
+|-
+|LANG
+|5V = English, 0V = Japanese
+|-
+|/LWR
+|Lower byte WRite
+|-
+|/M3
+|Mark III compatibility mode
+|-
+|style="background-color:#ff6633" colspan="2"|Clock lines
+|-
+|VCLK
+|68K clock
+|}
 [[Category:Chips]]