| 1 |
4 |
ale500 |
Changelong
|
| 2 |
|
|
----------
|
| 3 |
15 |
ale500 |
|
| 4 |
17 |
ale500 |
25.10.14
|
| 5 |
|
|
--------
|
| 6 |
|
|
- decoders.v : removed unused signals
|
| 7 |
|
|
- MC6809_cpu.v : Removed unused signals
|
| 8 |
|
|
|
| 9 |
|
|
20.10.14
|
| 10 |
|
|
---------
|
| 11 |
|
|
- MC6809_cpu.v : fixed wrong postincrement/predecrement write-back after memory access
|
| 12 |
|
|
|
| 13 |
16 |
ale500 |
25.07.14
|
| 14 |
|
|
---------
|
| 15 |
|
|
- decoders.v : new decoder: fix decoding of ABX, TST
|
| 16 |
|
|
- MC6809_cpu.v : Removed right path modifier, removed memdest register and associated logic
|
| 17 |
|
|
|
| 18 |
15 |
ale500 |
20.07.14
|
| 19 |
|
|
---------
|
| 20 |
|
|
- decoders.v : fix decoding of STD, LDD
|
| 21 |
14 |
ale500 |
16.07.14
|
| 22 |
|
|
--------
|
| 23 |
|
|
- decoders.v : decode of some opcodes modified to improve size & speed
|
| 24 |
|
|
- MC6809_cpu.v : Removed dec_o_optype and added single wire signals for common opcodes
|
| 25 |
11 |
ale500 |
|
| 26 |
12 |
ale500 |
06.07.14
|
| 27 |
|
|
--------
|
| 28 |
|
|
- decoders.v : fixed missing left/dest paths for sex
|
| 29 |
|
|
- alu16.v : fixed sex, mul, c flag for shifts, ror
|
| 30 |
|
|
- MC6809_cpu.v : fixed indirect indexed
|
| 31 |
13 |
ale500 |
|
| 32 |
12 |
ale500 |
05.07.14
|
| 33 |
|
|
--------
|
| 34 |
|
|
- decoders.v : fixed missing left/dest paths for daa
|
| 35 |
|
|
- alu16.v : fixed daa, h flag store and generation
|
| 36 |
|
|
|
| 37 |
|
|
04.07.14
|
| 38 |
|
|
--------
|
| 39 |
|
|
- decoders.v : fixed page 2&3 operands, jmp, cmp
|
| 40 |
|
|
- MC6809_cpu.v : fixed jmp
|
| 41 |
|
|
|
| 42 |
|
|
|
| 43 |
11 |
ale500 |
02.07.14
|
| 44 |
|
|
--------
|
| 45 |
|
|
- decoders.v : fixed dec, fixed inc (didn't read before write), fixed clr for ea direct, extended, indexed
|
| 46 |
|
|
added a path with the decoded sources/destination for the decode stage
|
| 47 |
|
|
- MC6809_cpu.v : implemented two paths for source/dest from the decoder
|
| 48 |
|
|
- rumsim.bat : added batch file for simulation
|
| 49 |
|
|
|
| 50 |
10 |
ale500 |
22.06.14
|
| 51 |
|
|
--------
|
| 52 |
4 |
ale500 |
|
| 53 |
10 |
ale500 |
- decoders.v : fixed wrong left/right/dest paths for several extended, page 2, 3 opcodes.
|
| 54 |
|
|
- MC6809_cpu.v : fixed jsr extended, indexed
|
| 55 |
|
|
|
| 56 |
|
|
06.02.14
|
| 57 |
|
|
--------
|
| 58 |
|
|
|
| 59 |
|
|
- regblock.v : dropped double write of PC
|
| 60 |
|
|
- MC6809_cpu.v : fixed loading of new PC from reset vector, rel8 displacement calculation.
|
| 61 |
|
|
|
| 62 |
9 |
ale500 |
06.01.14
|
| 63 |
|
|
--------
|
| 64 |
|
|
|
| 65 |
|
|
- decoders.v : added registered outputs for the source/destination address registers
|
| 66 |
|
|
|
| 67 |
7 |
ale500 |
05.01.14
|
| 68 |
|
|
--------
|
| 69 |
|
|
|
| 70 |
|
|
- MC6809_cpu.v : fixed exg (wrong source), implemented SYNC
|
| 71 |
9 |
ale500 |
- decoders.v : fixed destination for BIT
|
| 72 |
|
|
- defs.v : reduced the number of ALU opcodes
|
| 73 |
|
|
- alu16.v : reduced the number of ALU opcodes, fused BIT with AND, CMP with SUB
|
| 74 |
7 |
ale500 |
|
| 75 |
6 |
ale500 |
01.01.14
|
| 76 |
|
|
--------
|
| 77 |
|
|
|
| 78 |
|
|
- alu16.v : the alu has been bronken in two units
|
| 79 |
|
|
- MC6809_cpu.v : added CWAI states and decoding
|
| 80 |
|
|
- decodres.v : added CWAI decoding
|
| 81 |
|
|
|
| 82 |
5 |
ale500 |
31.12.13
|
| 83 |
|
|
--------
|
| 84 |
|
|
|
| 85 |
|
|
- Implemented TFR/EXG
|
| 86 |
|
|
- MC6809_cpu.v: Added one more state to execute TFR or EXG
|
| 87 |
|
|
- decoders.v: added source/dest for TFR and EXG
|
| 88 |
|
|
- regblock.v : added second write path to the registers for TFR&EXG
|
| 89 |
|
|
- defs.v defined new SEQ_TFREXG for tfr&exg execution
|
| 90 |
|
|
|
| 91 |
4 |
ale500 |
30.12.13
|
| 92 |
|
|
--------
|
| 93 |
|
|
|
| 94 |
|
|
- Fixed increment/decrement of the stack pointer
|
| 95 |
|
|
|
| 96 |
|
|
- MC6809_cpu.v: Push/pull increment/decrement the stack pointr in their own states
|
| 97 |
|
|
Added eamem source to the left alu data path to check for zero in the ea (leax/leay)
|
| 98 |
|
|
|
| 99 |
|
|
29.12.13
|
| 100 |
|
|
--------
|
| 101 |
|
|
|
| 102 |
|
|
- Fixed wrong byte in SEQ_MEM_WRITE_H
|
| 103 |
|
|
- Fixed unaffected Z flag for LEAX/LEAY
|
| 104 |
|
|
- Moved increment of pc from FETCH_2 to FETCH_1
|
| 105 |
|
|
- Fixed CMPA/CMPB/CMPX, they don't write a register back
|
| 106 |
|
|
- Fixed late write of pc
|
| 107 |
|
|
|
| 108 |
|
|
- decoders.v: Merged separated write_dest_x into one wire
|
| 109 |
|
|
Added a source_size wire to indicate the width of the source argument
|
| 110 |
|
|
Added the recognition of LEA as an alu mnemonic to modify the Z flag for LEAX/LEAY
|
| 111 |
|
|
|
| 112 |
|
|
- MC6809_cpu.v: Dropped checks for source size from the individual states and moved
|
| 113 |
|
|
into SEQ_MEM_READ_H
|
| 114 |
|
|
Merged write flags into k_dest_write
|
| 115 |
|
|
|
| 116 |
|
|
- alu.v: Added a LEA instruction for LEAX/LEAY where only the Z flag will be affected
|
| 117 |
|
|
|
| 118 |
|
|
- defs.v : added a LEA define to the ALU section
|
