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.
########################################################################### ## 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 Data bus 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* Adress strobe Pin 92 DS* Data strobe Pin 93 R/W* Read/Write Pin 94 BERR* Buss 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 inteface ???? 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??)