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DDI-1 with 64 KB

19 bytes added, 19:57, 18 September 2012
Link IC110 pin 13 to IC109 pin 1 (D2), show as a red wire on the circuit diagram.
Add a 74LS74 to latch D0 & D1, clock driven from IC107 pin 8. The outputs of the 74LS74 drive A14 & A15 of a 64 KB EPROM.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Link IC110 pin 13 to IC109 pin 1 (D2), show as a red wire on the circuit diagram.
[[Image:DDI164Kc.png|800px360px|centre]]
Wire the 74LS74 as shown:
[[Image:DDI164Kd.png|800px360px|centre]]
The CLK signal comes from here:
[[Image:DDI164Ke.png|800px360px|centre]]
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