Differences

This shows you the differences between two versions of the page.

--- schematics:megadriveexpport [2006/01/13 03:45] – 195.149.50.76
+++ schematics:megadriveexpport [2015/11/20 09:59] – Updated based on Sega schematics lawrence
@@ Line 7: / Line 7: @@
 ^pin^Name^Description^-^pin^Name^Description^
 |A01|GND|Ground|-|B01|GND|Ground|
-|A02|NC|No Contact|-|B02|!DISK||
+|A02|A19|Address 19|-|B02|/DISK|((Presumably signalling the presence of a CD?))|
-|A03|/C_OE|-|-|B03|A01|Address 01|
+|A03|/CAS0|-|-|B03|A01|Address 01|
 |A04|D00|Data 00|-|B04|A02|Address 02|
 |A05|D01|Data 01|-|B05|A03|Address 03|
@@ Line 26: / Line 26: @@
 |A19|D14|Data 14|-|B19|A16|Address 16|
 |A20|D15|Data 15|-|B20|A17|Address 17|
-|A21|87/315-5364|-|-|B21|/LDS|-|
+|A21|/ROM||-|B21|/LWR|(P-SRAM)|
-|A22|/LO_MEM|-|-|B22|/UDSW|-|
+|A22|/ASEL|(/LO_MEM)|-|B22|/UWR|(P-SRAM)|
-|A23|91/315-5364|-|-|B23|!CAS_2|((This pin connects to the cartridge slot B21, function unknown.))|
+|A23|/RAS2|-|-|B23|/CAS2|-|
-|A24|86/315-5364|-|-|B24|85/315-5364|-|
+|A24|/FDC|-|-|B24|FDWR|((Function unknown))|
-|A25|10/315-5309|-|-|B25|10/315-5309|-|
+|A25|FRES|-|-|B25|A18|-|
 |A26|+5v|+5v DC|-|B26|+5v|+5v DC|
-|A27|NC|No Contact|-|B27|NC|No Contact|
+|A27|SR3|Audio Out (R)|-|B27|SL3|Audio Out (L)|
 |A28|VCC IN|((VCC IN - It appears the SGCD is capable of powering the main console through these pins. Power from them is routed directly to the console power switch through a pair of diodes.
 ))|-|B28|VCC IN|-|
-|A29|Audio In|((This is assumed functional, but is untested. Should be bi-directoinal on Gensis 2))|-|B29|Audio In|-|
+|A29|SR2|Audio In (R)|-|B29|SL2|Audio In (L)|
 |A30|GND|Ground|-|B30|GND|Ground|
-//Shamelessly cribbed from [[http://www.gamesx.com/cartouts/gennyport.htm]].//
+^ Label ^ Description ^
+|  CAS | Column Address Strobe  |
+|  RAS | Row Address Strobe  |
+//Shamelessly cribbed from [[http://www.gamesx.com/cartouts/gennyport.htm]] and the missing bits filled in.//