schematics:megadrive1bapinout
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— | schematics:megadrive1bapinout [2019/08/27 20:45] (current) – external edit 127.0.0.1 | ||
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+ | ==== Bus Arbiter === | ||
+ | The Bus Arbiter is just there to keep things clean and to stop processors treading on each other' | ||
+ | |||
+ | ^Pin^Name^Description^-^Pin^Name^Description^ | ||
+ | |1| GND |Ground|-|51|MCLK|Master Clock input| | ||
+ | |2| - |Unknown|-|52| | ||
+ | |3| - |Unknown|-|53| | ||
+ | |4| - |Unknown|-|54| | ||
+ | |5| VA8 |68K Address 8|-|55| | ||
+ | |6| VA9 |68K Address 9|-|56| | ||
+ | |7| VA10 |68K Address 10|-|57| | ||
+ | |8| VA11 |68K Address 11|-|58| !WRES |Reset button input| | ||
+ | |9| VA12 |68K Address 12|-|59| | ||
+ | |10| VA13 |68K Address 13|-|60| | ||
+ | |11| VA14 |68K Address 14|-|61| | ||
+ | |12| VA15 |68K Address 15|-|62| | ||
+ | |13| VA16 |68K Address 16|-|63| | ||
+ | |14| VA17 |68K Address 17|-|64| | ||
+ | |15| VA18 |68K Address 18|-|65| | ||
+ | |16| VA19 |68K Address 19|-|66| !ZWR |Z80 !WR| | ||
+ | |17| VA20 |68K Address 20|-|67| | ||
+ | |18| VA21 |68K Address 21|-|68| | ||
+ | |19| VA22 |68K Address 22|-|69| | ||
+ | |20| VA23 |68K Address 23|-|70| | ||
+ | |21| FC0 |68K FC0|-|71| | ||
+ | |22| FC1 |68K FC1|-|72| | ||
+ | |23| !VPA |68K !VPA|-|73| | ||
+ | |24| !VRES |68K !Reset|-|74| | ||
+ | |25| !HALT |68K !HALT|-|75| | ||
+ | |26| VD8 |68K Data 8|-|76| | ||
+ | |27| - |Unknown|-|77| | ||
+ | |28| - |Unknown|-|78| | ||
+ | |29| - |Unknown|-|79| | ||
+ | |30| VCLK |68K Clock|-|80| | ||
+ | |31| GND |Ground|-|81| | ||
+ | |32| !TIME |Unknown|-|82| | ||
+ | |33| !CAS0 |I/O !CAS0|-|83| | ||
+ | |34| !DTAK |68K !DTAK|-|84| | ||
+ | |35| R/!W |68K R/ | ||
+ | |36| !LDS |68K !LDS|-|86| | ||
+ | |37| !VDS |68K !UDS|-|87| | ||
+ | |38| !AS |68K !AS|-|88| | ||
+ | |39| !INTAK | ||
+ | |40| - |Unknown|-|90| | ||
+ | |41| !VDPM |Unknown|-|91| | ||
+ | |42| !BG |68K !BG|-|92| | ||
+ | |43| !BGAK |68K !BGACK|-|93| | ||
+ | |44| !BR |68K !BR|-|94| | ||
+ | |45| !EOE |68K memory 2 !OE|-|95| | ||
+ | |46| IA14 |Unknown|-|96| | ||
+ | |47| !NOE |68K memory 1 !OE|-|97| | ||
+ | |48| EDCL |HSCLK|-|98| | ||
+ | |49| !OE0 |x|-|99| | ||
+ | |50| !HSYNC | ||
+ | |||
+ | There' |
schematics/megadrive1bapinout.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1