ALU update
5-13 note
I’m going to combine several days here since this will take time. It’s already too late for tonight, but here I am once again.
5-14 note
Ordering 4x 74hc191 from digikey at some point for the stack pointer, just a note for now. Need to start marking these chips with their purpose lol. this is from the Building the SAP-3 rev 3.3.pdf. It’s also, yet again, too late for tonight. I don’t have much time in the day for this project, at least while I’m still deciding what parts that I’ll need as I’m trying to stop buying parts online….LOL
Flag Register
I’m going with a 74hc574 because, why not…I already use it everywhere else. Hopefully it doesn’t come back to bite me, I don’t think it will.
| D1 | Carry Output | From high 181(left, pin 16) | | D2 | Zero | AND of both A=B outputs | (not implemented as of 5-13) | D3 | Overflow | XOR of carry MSB and carry OUT | (not implemented as of 5-13) | D4 | Sign | MSB of result(bit 7), inverted | (not implemented as of 5-13)