For finding the 74LSxxx and 28C16 EEPROM items try Banggood and Aliexpress or e-Bay.
Frank in County Wicklow Ireland
Hi @Arghadeep_Saha,
Do you have any more news about your project?
You don’t need to answer the questions I asked. I know the answers. I just asked them to try to help you understand what you might have to fix to eliminate errors in your project.
Best of luck for your project
Keep us informed.
Jorge
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Hello @arghadeep_saha I came across your post today. I am building the same 8-bit computer as you. I reckon you got over the ALU. I am having a few problems with it as well. I looked at the schematic you provided and I’d like to ask why you connected the XOR S86 pins to the 283 adder this way?
They way I read it is as follows:
Pin 8(3Y) from 74LS86 to 74LS283 Pin 11 (B4)
Pin 11 (4Y) from 74LS86 to 74LS283 Pin 15 (B3)
Pin 3 (1Y) from 74LS86 to 74LS283 Pin 2 (B2)
Pin 6 (2Y) from 74LS86 to 74LS283 Pin 6(B1)
Etc.
It seems to me that connections should be:
Pin 8(3Y) from 74LS86 to 74LS283 Pin 11 (B2)
Pin 11 (4Y) from 74LS86 to 74LS283 Pin 15 (B1)
Pin 3 (1Y) from 74LS86 to 74LS283 Pin 2 (B4)
Pin 6 (2Y) from 74LS86 to 74LS283 Pin 6(B3)
I am not sure, can you please confirm if possible?
Thank you in advance
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