6502/EightBitNet
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61 Commits
Author SHA1 Message Date
Adrian Conlon 39561437e9 More performance improvements 2026-06-10 17:26:26 +01:00
Adrian Conlon 110c68a54e Some small consistency changes. Interesting! 2026-05-28 18:01:33 +01:00
Adrian Conlon 932bcfd54e Some small consistency tidyups. 2026-05-24 22:48:34 +01:00
Adrian Conlon ec59b422b9 Simplify PC increment/decrement a little 2026-05-21 16:35:20 +01:00
Adrian Conlon 291266e4fc Assert that which needs to be checked, but not thrown 2026-05-21 10:00:57 +01:00
Adrian Conlon dfd4d1928f Make "Pop" more like "Read". i.e. don't return a result, just use the value placed on the "bus" 2026-05-18 18:24:32 +01:00
Adrian Conlon 741feb4342 Performance change: avoid dropping Bus.Data return values 2026-05-18 17:28:41 +01:00
Adrian Conlon 9a011b3c57 Start implementing HD6309. Introduction of 32-bit operations has forced me to rename some of "Word" methods to better indicate size 2026-05-16 21:10:23 +01:00
Adrian Conlon ab835297fd Couple of small tidy ups 2026-05-16 13:50:14 +01:00
Adrian Conlon e0fffdaa5e Some performance improvements. About 50Mhz for Z80 emulator. 275Mhz to 325Mhz. Interesting. 2026-05-16 11:09:03 +01:00
Adrian Conlon ac200d7f76 Simplify ignored return value handling 2026-05-12 22:21:13 +01:00
Adrian Conlon 699791f7a4 Simplify intermediate 16-bit register usage 2026-04-16 13:47:24 +01:00
Adrian Conlon 53e33b9eef Some simplifications 2026-04-07 12:02:31 +01:00
Adrian Conlon 290f7583c5 Correct region mis-label 2026-03-27 18:14:24 +00:00
Adrian Conlon ceacac4741 Fix up some oddities in the EightBit library 2025-10-06 13:44:31 +01:00
Adrian Conlon 9d208de9bb Explicitly state order of operations in code, rather than relying upon RAII etc. (for speed. Much faster) 2025-08-04 15:47:26 +01:00
Adrian Conlon 60ef099208 Tidy some inconsistencies in various emulation 2025-08-01 15:01:20 +01:00
Adrian Conlon 2f338c6c46 Tidy register increment/decrement a little. 2025-07-25 16:32:30 +01:00
Adrian Conlon c271b28495 Simplify bus addressing 2025-07-05 09:46:59 +01:00
Adrian Conlon 3bbf300e05 Simplify switching processor pin handling 2025-06-22 21:07:02 +01:00
Adrian Conlon 8331b4818e Couple of small Register16 adjustments 2025-05-11 21:30:15 +01:00
Adrian Conlon 36e983526e Add increment/decrement operations to the Register16 class 2025-05-11 19:24:40 +01:00
Adrian Conlon 93e09c192f Share instruction fetch and halt implementations 2025-05-04 11:41:28 +01:00
Adrian Conlon 2336222c97 Push more core processor handling into base classes. 2025-05-04 10:53:23 +01:00
Adrian Conlon cbe871d365 Isolate program counter increment/decrement (to be used for HALT processing) 2025-05-03 23:25:06 +01:00
Adrian Conlon 898a2bc7ea Try to bring the Z80 fusetest back to life 2025-05-03 02:09:31 +01:00
Adrian Conlon b461eb97d6 Prefer to use events directly, rather than through "On" methods 2025-03-29 11:31:47 +00:00
Adrian Conlon 3d6b549c76 Turns out using lambdas to control pins is lovely and correct, but terribly slow. Back to a more traditional method. 2025-03-24 20:18:04 +00:00
Adrian Conlon 8a68fc5856 Library fixes 2025-03-18 21:32:44 +00:00
Adrian Conlon 691b800d1a More .net 9 analysis changes 2024-10-12 12:24:42 +01:00
Adrian Conlon 9aa25fed7e Apply all analysis suggestions 2024-10-12 09:14:29 +01:00
Adrian Conlon f0815d4150 Code analysis corrections. 2024-10-09 22:15:25 +01:00
Adrian Conlon d5c0dcc175 Correct style issues 2024-10-09 20:05:37 +01:00
Adrian Conlon c8ac0f20dc Step can be split a little to make it easier to override. 2024-07-24 17:21:49 +01:00
Adrian Conlon 0c8ed57b0d Add easy to use Register16 assignment methods 2024-07-01 23:27:35 +01:00
Adrian Conlon 1a9b6d3db6 More "Word" optimisations 2024-06-30 14:36:32 +01:00
Adrian Conlon d8fad7b988 Try to minimise use of "Word" from Register16 2024-06-30 12:30:07 +01:00
Adrian Conlon 325bee8539 Couple of small processor improvements 2024-06-29 22:50:52 +01:00
Adrian Conlon 6e46c8e47f Rationalise use of "intermediate" Register16 2024-06-29 13:38:55 +01:00
Adrian Conlon 9e9d86423d get the C# code up to date with the C++ code. Much better support for undocumented modes/instructions etc. 2024-05-28 13:59:37 +01:00
Adrian Conlon e0235f396e IDE suggestions 2024-05-19 09:07:20 +01:00
Adrian Conlon 47ecdad3e8 Work towards accurate bus/memory/io timings. Especially Z80 m-cycle timing. 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2020-07-05 00:09:51 +01:00
Adrian Conlon c15ec96862 Make the Z80 implementation M-Cycle accurate. I think! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-11-30 14:06:38 +00:00
Adrian Conlon f01e3e0430 Tighten up the sequence associated with changing pin levels + fix persistent HALT/PC bug 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-09-06 22:50:21 +01:00
Adrian Conlon c06f556669 Simplify SignExtend a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-08-15 22:45:56 +01:00
Adrian Conlon 32731dc706 Add MC6809 disassembler (untested!) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-04-28 20:59:31 +01:00
Adrian Conlon 1d976e811d Introduce a little consistency with regards to pin naming and usage. 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2019-04-23 00:58:33 +01:00
Adrian Conlon 0ab5da10ef add unit tests (not complete) for 6809 processor. Fix matters arising. 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2019-04-21 04:47:36 +01:00
Adrian Conlon 6b33d2b5a5 Add a initial port of the MC6809 processor to the .Net collection 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2019-04-10 19:51:39 +01:00
Adrian Conlon e80963260d Try to avoid copying around Register16 references, if possible. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-03-07 01:21:00 +00:00