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• ee3ecc682d Add R/W pins to the MC6809 and MOS6502 processors. Hoping it'll ease peripheral development. Adrian Conlon 2019-09-15 12:49:32 +01:00
• 1ba238bfc7 Add support for RD and WR lines to the Z80 emulator. Adrian Conlon 2019-09-15 01:35:57 +01:00
• 6d6c95f695 Fix up INT and NMI pin (M1 and IORQ) response a little (still working on ZX81 emulator!) Adrian Conlon 2019-09-14 23:38:47 +01:00
• 4be4a0603e Refactor the Z80 implementation to: Adrian Conlon 2019-09-14 15:04:46 +01:00
• 74f70af758 Correct more Z80 disassembler problems (the ZX81 seems to use every instruction available!) Adrian Conlon 2019-09-08 21:27:35 +01:00
• 3e12ba6200 Sigh: Another Z80 interrupt related bug fix. Avoid a loop when an INT occurs, but interrupts are disabled. Adrian Conlon 2019-09-08 16:28:19 +01:00
• 0e8813cdf3 Show more state information for debugging output. Adrian Conlon 2019-09-07 23:57:17 +01:00
• def89dbcce Correct accidental setting of PC to 0x0001 on power on. Adrian Conlon 2019-09-07 11:14:38 +01:00
• 254cfbe342 Tidied up pin management to be synchronised with the .Net code. Adrian Conlon 2019-09-06 23:55:57 +01:00
• e1f22f6903 Make it slightly easier to call individual opcodes from external control. Adrian Conlon 2019-08-31 08:45:04 +01:00
• f48f1d559e Move all Intel derived processors over to the simpler "HALT" method. Adrian Conlon 2019-08-29 08:57:30 +01:00
• 4f47f3fc4d Simplifying the Z80 halt implementation looks better. Adrian Conlon 2019-08-29 08:51:15 +01:00
• 2efd53d33a Correct problematic continuation from "halt" on Z80. Adrian Conlon 2019-08-28 23:06:56 +01:00
• 4b0cf426b9 Add a couple of missing instructions to the disassembler (used by the ZX Spectrum ROM) Adrian Conlon 2019-08-18 17:40:18 +01:00
• 6940a54355 Update all EightBit projects to VS2019 (Latest SDK, C++17) Adrian Conlon 2019-08-17 11:04:29 +01:00
• 326ebfd8ea Merge branch 'master' of https://github.com/MoleskiCoder/EightBit Adrian Conlon 2019-08-16 21:57:01 +01:00
• 5ed01b61d1 Backport fixes from .Net EightBit library to C++ Adrian Conlon 2019-08-16 21:56:48 +01:00
• 5e9014997a Upgraded to VS2019, default SDK. Adrian Conlon 2019-08-06 13:16:38 +01:00
• 03975bd76b Remove unneeded "hex" method. Adrian Conlon 2019-08-06 13:15:39 +01:00
• 58e074b17f Refactor the keyboard scan code a little more, to make it more comprehensible. Adrian Conlon 2019-08-03 17:44:16 +01:00
• 45d1fe605f Mild refactoring of the keyboard IO to make the C++ and C# versions as close as possible. Adrian Conlon 2019-08-03 11:39:17 +01:00
• 86d5ae4745 Correct LR35902 disassembler mistake. Adrian Conlon 2019-07-27 19:48:22 +01:00
• 9f404d46a4 The LR35902 instruction set doesn't really need the "bit" instruction to return a value. Adrian Conlon 2019-07-21 11:25:56 +01:00
• 9d34d7ec3d Add a non-intrinsic version of findFirstSet to the EightBit library. Adrian Conlon 2019-07-21 11:25:06 +01:00
• def1c58e9d Tidy project settings across the EightBit library to be more consistent. Adrian Conlon 2019-07-06 22:45:16 +01:00
• 36465ce1c8 Refactor the Intel hex file loader into it's own class. Adrian Conlon 2019-07-06 22:44:42 +01:00
• ef09696ea2 Add analysis of 6809 instruction set PDFs Adrian Conlon 2019-07-05 21:43:23 +01:00
• 4734954932 Get the Linux port up and running again. Adrian Conlon 2019-07-05 21:42:19 +01:00
• dca2e1bb8e Bring the C++ code a little closer to the C# code. Adrian Conlon 2019-06-02 12:12:04 +01:00
• 90bfac83d5 Get the M6532 chip implementation to the point of being OK to test. Adrian Conlon 2019-05-27 13:21:35 +01:00
• d37f130577 Get the C++ version of the MC6850 synced with the C# version. Adrian Conlon 2019-05-27 10:57:02 +01:00
• ca0a98d9a7 MC6809: Correct test board wiring, such the MC6850 can be allowed to work! Adrian Conlon 2019-05-05 13:35:33 +01:00
• f5582df402 Add some more M6502 documentation. Adrian Conlon 2019-05-05 10:30:33 +01:00
• 467369d248 MC6850: Add JSR/RTS unit tests Adrian Conlon 2019-05-05 10:30:10 +01:00
• 3441fd062e Simplify the usage of the MC6850 Adrian Conlon 2019-05-05 10:29:41 +01:00
• 2c23289caa Expose the clock tick as an externally driven action. Adrian Conlon 2019-05-05 10:28:24 +01:00
• 4f8d3287d4 Whoops: Missed one of the update projects. Adrian Conlon 2019-05-05 10:27:08 +01:00
• 8f0dbe0dbc i8080: Small board level source layout change, no functional effect Adrian Conlon 2019-05-05 10:26:36 +01:00
• 1a0d3ad77a Go through all projects for configuration consistency. Adrian Conlon 2019-05-05 10:25:44 +01:00
• bbf8b2230d Merge branch 'master' of https://github.com/MoleskiCoder/EightBit Adrian Conlon 2019-03-02 21:59:00 +00:00
• 934a1f7025 Use the virtual methods, busRead and busWrite for all processor bus actions. Adrian Conlon 2019-03-02 21:58:34 +00:00
• ed47983928 Speed up the Intel 8080 disassembler. Adrian Conlon 2019-03-02 21:41:06 +00:00
• 6c5b595529 Update README.md Adrian Conlon 2019-02-07 00:01:04 +00:00
• 382ae30d32 Correct a couple of minor mistakes found while working on the .net port. Adrian Conlon 2019-02-03 00:46:49 +00:00
• f0376fa81e Use macros to define our device pins. Adrian Conlon 2019-01-14 23:17:54 +00:00
• 4d08487513 Merge branch 'master' of https://github.com/MoleskiCoder/EightBit Adrian Conlon 2019-01-14 08:26:42 +00:00
• 7f853ec73f Add missing 6502 pin events Adrian Conlon 2019-01-14 08:26:27 +00:00
• a44658ec94 Correct a coulple of newly introduced GB issues. Adrian Conlon 2019-01-14 02:23:48 +00:00
• 92d23d82d6 Start big refactor of device/CPU pin usage (to allow pin events throughout). Adrian Conlon 2019-01-14 02:10:17 +00:00
• 9755a5fcd2 Add the concept of a clocked chip Adrian Conlon 2019-01-10 22:23:51 +00:00
• 71daf6aa38 Split Chip class into Device and Chip. Adrian Conlon 2019-01-10 20:44:16 +00:00
• 68030610d8 Move to an event driven clock tick event for all CPUs Adrian Conlon 2019-01-09 23:24:33 +00:00
• 8b187e7614 The clock still has to tick, even while held on RDY low, otherwise cycle timing won't work. Adrian Conlon 2019-01-09 09:05:12 +00:00
• a90ca6ba38 Move RDY initialisation to the CPU power-on sequence. Not strictly correct, but OK. Adrian Conlon 2019-01-09 00:33:56 +00:00
• 87d86bcd84 Whoops: missed unneeded method declaration. Adrian Conlon 2019-01-09 00:08:03 +00:00
• 01175cf9eb Add support for emulated SYNC and RDY lines. Untested, but feel close. Adrian Conlon 2019-01-08 23:55:27 +00:00
• 047babbe7c Rearrange the RESET handler for cycle accuracy. Use more of the general interrupt handler, but with "dummy" stack write access. Adrian Conlon 2019-01-08 23:09:52 +00:00
• 25321e78e7 Now that HALT/RESET/NMI/IRQ and BRK have a unified architecture, I think this wraps up the instruction handler of the 6502. Adrian Conlon 2019-01-08 01:32:43 +00:00
• 3faec680b0 I think this fixes one of my NES issues. The fix-up required for the PC is handled by the fetchByte associated with the BRK instruction. Adrian Conlon 2019-01-07 01:28:23 +00:00
• 741e005e0c Add some more 6809 documentation. Adrian Conlon 2019-01-07 01:09:24 +00:00
• d7763d8215 Profile mode no longer exists on the 6502 test program. Adrian Conlon 2019-01-07 01:08:23 +00:00
• 06e2a5c947 Start unifying 6502 interrupt handling. NMI/IRQ/BRK are all doing mostly the same work. Adrian Conlon 2019-01-07 01:06:07 +00:00
• b7b7c93a77 This tidies the last of 6502 cycle accurate instruction implementations. Adrian Conlon 2019-01-06 22:34:53 +00:00
• ad644f7013 Tidy the 6502 instruction switch statement a little to lessen the width a little. Adrian Conlon 2019-01-06 20:51:13 +00:00
• c3d2ef51d9 Cycle accuracy for a couple of the indexed write (store) instructions. Adrian Conlon 2019-01-06 20:39:37 +00:00
• 4d3be9e756 Use correct boundary crossing conditional for Read/Modify/Write Absolute,X addressing mode. Adrian Conlon 2019-01-06 12:58:13 +00:00
• baf32cef89 Get the memory access more correct for more of boundary crossing indexed addressing modes. Adrian Conlon 2019-01-06 12:17:43 +00:00
• a13ad5042a Correct constructions of register16_t: the structure is "#ifdef"ed for different endian arrangements. Adrian Conlon 2019-01-06 11:27:43 +00:00
• 3749585398 Cycle accuracy changes for BRK/RTI instructions. Adrian Conlon 2019-01-06 11:13:49 +00:00
• 5b9c348ff1 Remove nodiscard instance where we're using the method for cycle/memory accuracy. Adrian Conlon 2019-01-06 11:10:05 +00:00
• 3337f57747 More cycle accuracy changes, concentrating on stack operations. Adrian Conlon 2019-01-05 23:21:43 +00:00
• f5125b2a35 Add some documentation regarding instruction cycle timings. Adrian Conlon 2019-01-05 23:21:12 +00:00
• 143e9a9e68 More cycle accuracy changes: 1) implied instruction, pointless fetch 2) branch pointless fetch when condition is met Adrian Conlon 2019-01-05 17:23:50 +00:00
• 3b7cec9c69 Spot a couple more addCycle patterns. Adrian Conlon 2019-01-04 09:17:59 +00:00
• d2e853f101 Explicitly note implied addressing mode instructions. Adrian Conlon 2019-01-04 08:20:23 +00:00
• 556e06426e Further work on the slow migration to a cycle accurate 6502 Adrian Conlon 2019-01-03 01:04:12 +00:00
• 6c582f6349 Add a working(ish) 6502 ATX implementation. Adrian Conlon 2018-12-30 17:12:45 +00:00
• 5ade05a689 Add a bunch of undocumented 6502 instructions. Abandoned ATX implementation. Too poorly documented. Adrian Conlon 2018-12-30 12:01:23 +00:00
• 815c99710a Add enough undocumented 6502 instructions to get through "nestest". Adrian Conlon 2018-12-29 22:22:31 +00:00
• c136b306ab Use the new busRead/Write processor methods to simplify the 6502 cycle counting. Adrian Conlon 2018-12-29 22:18:01 +00:00
• adb60a6e90 Port the 6502 to the new bus architecture. Adrian Conlon 2018-12-29 19:40:02 +00:00
• f38d326ca7 Improve the flexibility of the BUS mapping/read/write architecture. Adrian Conlon 2018-12-29 19:17:36 +00:00
• 722888ae66 Correct ROM loading issue discovered while resurrecting NES support. Adrian Conlon 2018-12-29 19:06:24 +00:00
• 2a223a5acd More M6532 documentation added/adjusted Adrian Conlon 2018-12-03 23:39:22 +00:00
• fe1aaf56c7 Add work in progress of M6532 Riot chip. Nowhere near working yet, but includes lots of documentation. Adrian Conlon 2018-12-03 22:54:57 +00:00
• d6ebf00ccc Merge branch 'master' of https://github.com/MoleskiCoder/EightBit Adrian Conlon 2018-12-01 16:46:06 +00:00
• 679275e930 Correct Linux build errors. Adrian Conlon 2018-12-01 16:41:39 +00:00
• dc477cd050 Use explicit enumeration types (improves type safety) where appropriate. Adrian Conlon 2018-12-01 15:24:29 +00:00
• cf0828c595 Tidy the Z80 BIT implementation for better code resuse. No functional change Adrian Conlon 2018-12-01 13:01:33 +00:00
• 802ad6041d Update project README.md Adrian Conlon 2018-11-29 01:37:53 +00:00
• e80a5bfcd4 Whoops: the bit instruction *can* have its return value discarded... Adrian Conlon 2018-11-29 00:14:44 +00:00
• 9960ad6012 Tidy return parameter usage a little within the EightBit library. Adrian Conlon 2018-11-29 00:09:40 +00:00
• deb9a6d43c Correct more analysis problems. No functional changes. Adrian Conlon 2018-11-28 21:27:14 +00:00
• a940a29283 Unify build settings across all the EightBit libraries. Adrian Conlon 2018-11-28 21:24:51 +00:00
• a673a64c3f Lots of various changes suggested by the code analysis tools. Adrian Conlon 2018-11-27 22:36:54 +00:00
• 555423d10a Tidy the Z80 test classes, based on code analysis. Adrian Conlon 2018-11-27 22:28:09 +00:00
• 0313037d6f Tidy the 8080 test configuration class a little. Adrian Conlon 2018-11-27 22:19:15 +00:00
• 9dcaaadf80 Simplify a couple of the MC6809 test projects. Adrian Conlon 2018-11-25 19:05:14 +00:00
• e156b1ff1a Correct some more compilation warnings (across the whole EightBit project). Adrian Conlon 2018-11-25 19:02:11 +00:00
• 21a16a3c97 Ensure newly added C++ implementations are in the VisualStudio project files. Adrian Conlon 2018-11-25 11:05:41 +00:00