6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-23 03:32:32 +00:00
Code Issues Projects Releases Wiki Activity
9,170 Commits 8 Branches 121 Tags 496 MiB
57aa8d2f17
Commit Graph

1096 Commits

Author SHA1 Message Date
Thomas Harte
57aa8d2f17 Correct timing of ADDQ. 2022-05-29 14:34:06 -04:00
Thomas Harte
35e73b77f4 Fix interrupt stack frame. 2022-05-27 21:55:17 -04:00
Thomas Harte
d17d77714f Remove outdated TODO. 2022-05-27 15:40:06 -04:00
Thomas Harte
e8dd8215ba Tweak per empirical results. 2022-05-27 15:39:02 -04:00
Thomas Harte
e11990e453 Make an attempt at DIVS timing. 2022-05-27 15:38:54 -04:00
Thomas Harte
165ebe8ae3 Add time calculation for MULU and MULS. 2022-05-27 15:38:14 -04:00
Thomas Harte
e746637bee Fill in dynamic cost of shifts. 2022-05-27 15:38:08 -04:00
Thomas Harte
67b340fa5e Fix interrupt request address. 2022-05-27 10:33:36 -04:00
Thomas Harte
c97245e626 Fix CalcEA timing; make MOVEfromSR a read-modify-write. 2022-05-27 10:32:28 -04:00
Thomas Harte
367ad8079a Add a call to set register state with population of the prefetch. 2022-05-25 20:22:05 -04:00
Thomas Harte
80c1bedffb Eliminate false prefetch for BSR. 2022-05-25 16:32:02 -04:00
Thomas Harte
56ad6d24ee Fix ANDI/ORI/EORI to CCR/SR timing. 2022-05-25 16:20:26 -04:00
Thomas Harte
4ad0e04c23 Fix macro for n being an expression. 2022-05-25 16:05:45 -04:00
Thomas Harte
ee58301a46 Add RaiseException macro. 2022-05-25 15:45:09 -04:00
Thomas Harte
72425fc2e1 Fix bus data size of MOVE.b xx, -(An). 2022-05-25 13:00:36 -04:00
Thomas Harte
a5f2dfbc0c Initialise registers to 0 for better testability. 
TODO: is this the real initial state?
 2022-05-25 11:47:42 -04:00
Thomas Harte
5db6a937cb Have TRAP and TRAPV push the next instruction address to the stack. 2022-05-25 11:47:21 -04:00
Thomas Harte
9709b9b1b1 Standard exceptions don't raise the interrupt level. 2022-05-25 11:37:39 -04:00
Thomas Harte
5872e0ea4a Resolve MOVE.l xx, -(An) write target. 2022-05-25 08:15:18 -04:00
Thomas Harte
f43d27541b Avoid attempt to establish operand flags for undefined opcodes. 2022-05-24 15:53:12 -04:00
Thomas Harte
0f7cb2fa5a Attempt to honour the trace flag. 2022-05-24 15:47:47 -04:00
Thomas Harte
01e93ba916 Make an attempt at bus/address error. 2022-05-24 15:42:50 -04:00
Thomas Harte
780954f27b Add TRAP, TRAPV. 2022-05-24 15:14:46 -04:00
Thomas Harte
6f048de973 Pull unrecognised instruction handling into the usual switch table. 2022-05-24 12:42:34 -04:00
Thomas Harte
0dfaa7d9cf Interrupt fixes: supply proper address, raise level, fetch from vector. 2022-05-24 12:16:06 -04:00
Thomas Harte
eab720f6ea Ensure proper transition from unrecognised instructions. 2022-05-24 12:16:00 -04:00
Thomas Harte
a7e8aef9d3 Add MOVEA, be slightly more careful about next_operand_. 2022-05-24 11:30:09 -04:00
Thomas Harte
df54f1f1b7 Update TODO. 2022-05-24 11:06:05 -04:00
Thomas Harte
9e3c2b68d7 Eliminate potential future implicit conversion warnings. 2022-05-24 11:05:24 -04:00
Thomas Harte
3349bcaaed Attempt interrupt support. 2022-05-24 10:53:59 -04:00
Thomas Harte
3a4fb81242 Add a dummy STOP state. 2022-05-24 10:25:40 -04:00
Thomas Harte
1df3ad0671 Ensure TAS responds to VPA, BERR. 2022-05-24 09:17:58 -04:00
Thomas Harte
523cdd859b Add bus and address error, and VPA checks. 2022-05-24 09:08:31 -04:00
Thomas Harte
b037c76da6 Add public interface for everything except HALT and BUS REQ/etc. 
... neither of which are used by machines I currently implement.
 2022-05-23 20:55:01 -04:00
Thomas Harte
9cac4ca317 Add MOVE to/from USP. 2022-05-23 20:42:41 -04:00
Thomas Harte
34e5f39571 Ensure that running exactly up to a boundary gives the bus handler the next microcycle to contemplate. 2022-05-23 15:11:33 -04:00
Thomas Harte
e0a279344c Codify the existence of special cases, implement NOP and RESET. 2022-05-23 15:09:46 -04:00
Thomas Harte
e2f4db3e45 Shuffle more of the flow controller methods into their proper place. 2022-05-23 12:06:14 -04:00
Thomas Harte
c1837af84a Add notes to self on work remaining. 2022-05-23 11:02:31 -04:00
Thomas Harte
a87f6a28c9 Fix LINK A7. 2022-05-23 10:43:17 -04:00
Thomas Harte
98325325b1 Fix UNLINK A7. 2022-05-23 10:27:44 -04:00
Thomas Harte
26bf66e3f8 Fix shifts and rolls. 2022-05-23 10:09:46 -04:00
Thomas Harte
363cd97154 Resolve double definition of did_shift. 2022-05-23 10:07:24 -04:00
Thomas Harte
c6b3281274 Attempt the shifts and rolls. 2022-05-23 09:29:19 -04:00
Thomas Harte
1e8adc2bd9 Fix MOVEP to R. 2022-05-23 09:00:37 -04:00
Thomas Harte
c73021cf3c Implement MOVE. 2022-05-23 08:46:06 -04:00
Thomas Harte
1b3acf9cd8 Eliminate assumption. 2022-05-23 08:18:37 -04:00
Thomas Harte
c8ede400eb Fix RTE. 2022-05-22 21:17:28 -04:00
Thomas Harte
269263eecf Implement RTE, RTS, RTR. 2022-05-22 21:16:38 -04:00
Thomas Harte
faef5633f8 Ensure MOVE from SR has an effective address to write to. 2022-05-22 20:52:00 -04:00