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, I
can in no way guarantee that the information is correct and I
will not repair/fix/pay for your damaged unit.
CONNECTION TYPE: cd32 expansion port (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* 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 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??)
COMPILED & WRITTEN BY PAUL ANDREWS JR
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