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Amiga Technical References

CD32 Expansion Port

Here's a short description of what signals can be found on the expansion port of the CD32. The connector itself is a the same as used for the PCs 32-bit MCA (Micro Channel Adaptor) bus. It should have 182 pins. Please use this information at your own risk.

    
###########################################################################
##                  CD32 Expansion port info. 1994-07-05                 ##
##                                                                       ##
###########################################################################

 2                         84___86                        182   |--- TOP
 ////////////////////////////   ////////////////////////////    v
/==========================/   /==========================/
^                          ^   ^                          ^     ^
1                         83   85                       181     |___ BOT

Pin  #   Name           Comment
===========================================================================
Pin  1   A31            Probably not connected since 68EC020
 |       |              |
Pin  8   A24            Probably not connected since 68EC020
Pin  9   DGND
Pin 10   VCC
Pin 11   A23            Address bus
 |       |              |
Pin 18   A16            |
Pin 19   DGND           |
Pin 20   VCC            |
Pin 21   A15            |
 |       |              |
Pin 28   A8             |
Pin 29   DGND           |
Pin 30   VCC            |
Pin 31   A7             |
 |       |              |
Pin 38   A0             Address bus
Pin 39   DGND
Pin 40   VCC
Pin 41   D31            Data bus
 |       |              |
Pin 48   D24            |
Pin 49   DGND           |
Pin 50   VCC            |
Pin 51   D23            |
 |       |              |
Pin 58   D16            |
Pin 59   DGND           |
Pin 60   VCC            |
Pin 61   D15            |
 |       |              |
Pin 68   D8             |
Pin 69   DGND           |
Pin 70   VCC            |
Pin 71   D7             |
 |       |              |
Pin 78   D0             Databus
Pin 79   DGND

Pin 80   VCC
Pin 81   IPL2*          Interrupt Priority Level
Pin 82   IPL1*          |
Pin 83   IPL0*          Interrupt Priority Level
Pin 84
Pin 85   RST*           Master Reset of whole unit??????
Pin 86   HALT*          Halt processor 
Pin 87   ECS*           Not implemented on 68EC020
Pin 88   OCS*           Not implemented on 68EC020
Pin 89   SIZE1          Indicates number of bytes remaining to transfer

Pin 90   SIZE0          Indicates number of bytes remaining to transfer
Pin 91   AS*            Address strobe
Pin 92   DS*            Data strobe
Pin 93   R/W*           Read/Write
Pin 94   BERR*          Bus Error
Pin 95
Pin 96   AVEC*          Autovector request during interrupt acknowledge
Pin 97   DSACK1*        Data transfer and size acknowledge
Pin 98   DSACK0*        Data transfer and size acknowledge
Pin 99   CPUCLK_A
Pin100
Pin101   DGND
Pin102   VCC
Pin103   FC2            Function codes
Pin104   FC1            Function codes
Pin105   FC0            Function codes
Pin106
Pin107
Pin108
Pin109
Pin110
Pin111   CPU_BR*        CPU bus request????
Pin112   EXP_BG*        Expansion bus granted????
Pin113   CPU_BG*        CPU bus granted????
Pin114   EXP_BR*        Expansion bus request
Pin115
Pin116
Pin117   PUNT*
Pin118   RESET*         68020 RESET
Pin119   INT2*          Generate a level 2 interrupt
Pin120   INT6*          Generate a level 6 interrupt
Pin121   KB_CLOCK*      Keybord clock
Pin122   KB_DATA*       Keybord data
Pin123   FIRE0*         Fire buttons
Pin124   FIRE1*         |
Pin125   LED*           Power On Led ?
Pin126   ACTIVE*        Disk active led
Pin127   RXD*           Serial data in
Pin128   TXD*           Serial data out
Pin129   DKRD*          Floppy interface (paula?)
Pin130   DKWD*          Floppy interface (paula?)
Pin131   SYSTEM         ??????
Pin132   DKWE*          Floppy interface (paula?)
Pin133   CONFIG_OUT     ??????
Pin134
Pin135   DGND
Pin136   +12V
Pin137   DGND
Pin138   +12
Pin139   17MHZ         FMV interface ????
Pin140   EXT_AUDIO*    ^
Pin141   DA_DATA       |
Pin142   MUTE*         |
Pin143   DA_LRCLK      v
Pin144   DA_BCLK       FMV inteface ????
Pin145   DGND
Pin146   VCC
Pin147   DR            Digital Red
Pin148   DG            Digital Green
Pin149   DB            Digital Blue
Pin150   DI            Digital Intensity
Pin151   PIXELSW_EXT*
Pin152   PIXELSW*
Pin153   BLANK*
Pin154   PIXELCLK      Pixelclock for manipulating RBG data
Pin155   DGND
Pin156   VCC
Pin157   CSYNC*        Composite sync
Pin158   CCK_B         Color clock ?????
Pin159   HSYNC*        Horizontal sync
Pin160   VSYNC*        Vertical sync
Pin161   VGND          Video ground
Pin162   VGND          Video ground
Pin163   AR_EXT        Analog Red  (Why two of them??)
Pin164   AR            Analog Red     ^
Pin165   AG_EXT        Analog Green   |
Pin166   AG            Analog Green   |
Pin167   AB_EXT        Analog Blue    v
Pin168   AB            Analog Blue (Why two of them??)
Pin169   VGND          Video ground
Pin170   VGND          Video ground
Pin171   NTSC*
Pin172   XCLKEN*       Enable External video clock (Genlock)
Pin173   XCLK          External video clock (Genlock)
Pin174   EXT_VIDEO*    Disable internal video interfaces
Pin175   DGND
Pin176   VCC
Pin177   AGND
Pin178   +12 
Pin179   LEFT_EXT      Left sound   (Why two of them??)
Pin180   LEFT          Left sound    |
Pin181   RIGHT_EXT     Right sound   |
Pin182   RIGHT         Right sound  (Why two of them??)
    
   

Copyright 2000 Amiga Auckland Inc. All rights reserved.
Revised: August 13, 2005.