5-15

Author: thecodingchicken

_posts/2020-01-01-color_design.md

@@ -12,4 +12,5 @@ I want to lay out the basic building plans here, mainly about color and design c
 | Gray    | Control | Processed Control Lines      |
 | Yellow  | Control | Control Lines from Flash     |
 | Orange  | Reset   | Reset lines				   |
-| Violet  | LEDs    | wires for LED display boards |
+| Violet  | LEDs    | wires for LED display boards |
+| Brown   | Misc    | Flags, other listed things   |

_posts/2020-01-05-current-jameco-ordering-list.md

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+## Stuff I need to buy
+
+- Potentially another 100ft purple wire roll (2154880)

_posts/2025-05-15-alu-update.md

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+## 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
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+## 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)