diff options
| author | Jan Tuomi <jans.tuomi@gmail.com> | 2023-04-08 17:20:32 +0300 |
|---|---|---|
| committer | Jan Tuomi <jans.tuomi@gmail.com> | 2023-04-08 17:20:32 +0300 |
| commit | 5ab9865fa6ed343ae0cffefb81b20af2e533e36f (patch) | |
| tree | 57949a3b8335cdf58234e366e50701a19bd6c21d /src/ucode.py | |
| parent | 10e0c53890701abe53c80f1da4a0b64bbd05914c (diff) | |
Move from logisim to digital
Diffstat (limited to 'src/ucode.py')
| -rwxr-xr-x | src/ucode.py | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/src/ucode.py b/src/ucode.py index ea5c040..9d7c55c 100755 --- a/src/ucode.py +++ b/src/ucode.py @@ -16,16 +16,16 @@ PC_CO = 0b0000_0000_0000_0001 PC_IE = 0b0000_0000_0000_0010 PC_OE = 0b0000_0000_0000_0100 MAR_IE = 0b0000_0000_0000_1000 -RAM_IE = 0b0000_0000_0001_0000 -RAM_OE = 0b0000_0000_0010_0000 -R1_IE = 0b0000_0000_0100_0000 +MEM_IE = 0b0000_0000_0001_0000 +MEM_OE = 0b0000_0000_0010_0000 +RW_IE = 0b0000_0000_0100_0000 R1_OE = 0b0000_0000_1000_0000 -R2_IE = 0b0000_0001_0000_0000 -R2_OE = 0b0000_0010_0000_0000 -IR_IE = 0b0000_0100_0000_0000 -L9_OE = 0b0000_1000_0000_0000 -L12_OE = 0b0001_0000_0000_0000 -ALU_OE = 0b0010_0000_0000_0000 +R2_OE = 0b0000_0001_0000_0000 +IR_IE = 0b0000_0010_0000_0000 +L9_OE = 0b0000_0100_0000_0000 +unused1 = 0b0000_1000_0000_0000 +ALU_OE = 0b0001_0000_0000_0000 +FR_IE = 0b0010_0000_0000_0000 HALT = 0b0100_0000_0000_0000 US_RS = 0b1000_0000_0000_0000 @@ -39,22 +39,22 @@ def not_branch(bs): def branch(false_branch, true_branch): return [false_branch, true_branch] -fetch = [PC_OE|MAR_IE, RAM_OE|IR_IE|PC_CO] +fetch = [PC_OE|MAR_IE, MEM_OE|IR_IE|PC_CO] def nop(): return not_branch([*fetch, US_RS, 0, 0, 0, 0, 0]) ucode = [ - # ALU 0000 LLLR RRTT TSSS - not_branch([*fetch, ALU_OE, US_RS, 0, 0, 0, 0]), - # ALS 0001 LLLR RRTT TSSS - not_branch([*fetch, ALU_OE, US_RS, 0, 0, 0, 0]), - # LDR 0010 RRRT TTXX XXXX - not_branch([*fetch, R1_OE|MAR_IE, RAM_OE|R2_IE, US_RS, 0, 0, 0]), + # ALU 0000 LLLR RRSS STTT + not_branch([*fetch, ALU_OE|FR_IE|RW_IE, US_RS, 0, 0, 0, 0]), + # ALS 0001 LLLR RRSS STTT + not_branch([*fetch, ALU_OE|FR_IE|RW_IE, US_RS, 0, 0, 0, 0]), + # LDR 0010 RRRX XXXX XTTT + not_branch([*fetch, R1_OE|MAR_IE, MEM_OE|RW_IE, US_RS, 0, 0, 0]), # STR 0011 RRRT TTXX XXXX - not_branch([*fetch, R1_OE|MAR_IE, R2_OE|RAM_IE, US_RS, 0, 0, 0]), - # LDI 0100 RRRI IIII IIII - not_branch([*fetch, L9_OE|R1_IE, US_RS, 0, 0, 0, 0]), + not_branch([*fetch, R1_OE|MAR_IE, R2_OE|MEM_IE, US_RS, 0, 0, 0]), + # LDI 0100 IIII IIII ITTT + not_branch([*fetch, H9_OE|RW_IE, US_RS, 0, 0, 0, 0]), # JMP 0101 RRRX XXXX XXXX not_branch([*fetch, R1_OE|PC_IE, US_RS, 0, 0, 0, 0]), # BR 0110 XFFR RRXX XXXX |