diff options
| author | uvok | 2026-01-21 20:17:44 +0100 |
|---|---|---|
| committer | uvok | 2026-01-21 20:17:44 +0100 |
| commit | a7cb46cac7575875dd38e7d3135fd54d78598523 (patch) | |
| tree | de80c0570f62dc027629c731f2f5174cec86a9a4 /eater_cpu/readme.txt | |
| parent | bd137cec37fade1acc2a5ee2db546b8dc67f64d0 (diff) | |
Explain separate PC++ state
need to get correct next state, once
INS is loaded.
Diffstat (limited to 'eater_cpu/readme.txt')
| -rw-r--r-- | eater_cpu/readme.txt | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/eater_cpu/readme.txt b/eater_cpu/readme.txt index aa72328..44fe1b1 100644 --- a/eater_cpu/readme.txt +++ b/eater_cpu/readme.txt @@ -40,8 +40,14 @@ operation Increment PC. a) PC out -> MAR (PC_to_bus) + (bus_to_MAR) + (clk) - b) MEM -> INS, PC++ - (RAM_to_bus) + (bus_to_INS) + (PC_count_en) + (clk) + b) MEM -> INS + (RAM_to_bus) + (bus_to_INS) + (clk) + c) PC++ + (PC_count_en) + (clk) + + NOTE: + Yes, I know Ben Eaters computer combines b and c. + See eater_types for details. 2. Decode and execute instruction. |