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schematics:megadriveexpport [2006/01/13 04:47]
195.149.50.76 Added a few missing details.
schematics:megadriveexpport [2019/08/27 20:45] (current)
Line 7: Line 7:
 ^pin^Name^Description^-^pin^Name^Description^ ^pin^Name^Description^-^pin^Name^Description^
 |A01|GND|Ground|-|B01|GND|Ground| |A01|GND|Ground|-|B01|GND|Ground|
-|A02|NC|No Contact|-|B02|!DISK|((Presumably signalling the presence of a CD?))| +|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| |A04|D00|Data 00|-|B04|A02|Address 02|
 |A05|D01|Data 01|-|B05|A03|Address 03| |A05|D01|Data 01|-|B05|A03|Address 03|
Line 26: Line 26:
 |A19|D14|Data 14|-|B19|A16|Address 16| |A19|D14|Data 14|-|B19|A16|Address 16|
 |A20|D15|Data 15|-|B20|A17|Address 17| |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| |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. |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|-| ))|-|B28|VCC IN|-|
-|A29|Audio In|((This is assumed functional, but is untested. Should be bi-directional on Gensis 2))|-|B29|Audio In|-|+|A29|SR2|Audio In (R)|-|B29|SL2|Audio In (L)|
 |A30|GND|Ground|-|B30|GND|Ground| |A30|GND|Ground|-|B30|GND|Ground|
 +
 +^ 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.// //​Shamelessly cribbed from [[http://​www.gamesx.com/​cartouts/​gennyport.htm]] and the missing bits filled in.//
 
 schematics/megadriveexpport.txt · Last modified: 2019/08/27 20:45 (external edit)
 
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