6502/EightBit
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174 Commits

Author SHA1 Message Date
Adrian Conlon
c8bdabf34f Reflect that the I/O for Intel style processors isn't part of the CPU, but attached to the Bus and access controlled by the CPU. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2020-02-09 11:51:58 +00:00
Adrian Conlon
dc37d61797 Tidy up some shared code for the Z80 pushWord vs call timing. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-12-29 13:03:44 +00:00
Adrian Conlon
d9466082ec M-Cycle accurate Z80 modifications. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-12-29 01:18:54 +00:00
Adrian Conlon
cb502bd65d Halt is of course an "output" pin. (So that the halt instruction can work) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-11-19 23:05:27 +00:00
Adrian Conlon
d0467421ff Improve compatibility with .net emulator code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-11-09 18:58:23 +00:00
Adrian Conlon
20ebbd4048 Start added more .net compatibility methods 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-11-03 09:23:28 +00:00
Adrian Conlon
ee3ecc682d Add R/W pins to the MC6809 and MOS6502 processors. Hoping it'll ease peripheral development. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-09-15 12:49:32 +01:00
Adrian Conlon
254cfbe342 Tidied up pin management to be synchronised with the .Net code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-09-06 23:55:57 +01:00
Adrian Conlon
4f47f3fc4d Simplifying the Z80 halt implementation looks better. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-08-29 08:51:15 +01:00
Adrian Conlon
5ed01b61d1 Backport fixes from .Net EightBit library to C++ 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-08-16 21:56:48 +01:00
Adrian Conlon
9d34d7ec3d Add a non-intrinsic version of findFirstSet to the EightBit library. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-07-21 11:25:06 +01:00
Adrian Conlon
36465ce1c8 Refactor the Intel hex file loader into it's own class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-07-06 22:44:42 +01:00
Adrian Conlon
4734954932 Get the Linux port up and running again. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-07-05 21:42:19 +01:00
Adrian Conlon
dca2e1bb8e Bring the C++ code a little closer to the C# code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-06-02 12:12:04 +01:00
Adrian Conlon
2c23289caa Expose the clock tick as an externally driven action. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-05-05 10:28:24 +01:00
Adrian Conlon
934a1f7025 Use the virtual methods, busRead and busWrite for all processor bus actions. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-03-02 21:58:34 +00:00
Adrian Conlon
382ae30d32 Correct a couple of minor mistakes found while working on the .net port. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-02-03 00:46:49 +00:00
Adrian Conlon
f0376fa81e Use macros to define our device pins. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-14 23:17:54 +00:00
Adrian Conlon
92d23d82d6 Start big refactor of device/CPU pin usage (to allow pin events throughout). 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-14 02:10:17 +00:00
Adrian Conlon
9755a5fcd2 Add the concept of a clocked chip 2019-01-10 22:23:51 +00:00
Adrian Conlon
71daf6aa38 Split Chip class into Device and Chip. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-10 20:44:16 +00:00
Adrian Conlon
68030610d8 Move to an event driven clock tick event for all CPUs 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-09 23:24:33 +00:00
Adrian Conlon
5b9c348ff1 Remove nodiscard instance where we're using the method for cycle/memory accuracy. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-06 11:10:05 +00:00
Adrian Conlon
556e06426e Further work on the slow migration to a cycle accurate 6502 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-03 01:04:12 +00:00
Adrian Conlon
f38d326ca7 Improve the flexibility of the BUS mapping/read/write architecture. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-12-29 19:17:36 +00:00
Adrian Conlon
d6ebf00ccc Merge branch 'master' of https://github.com/MoleskiCoder/EightBit 2018-12-01 16:46:06 +00:00
Adrian Conlon
679275e930 Correct Linux build errors. 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2018-12-01 16:41:39 +00:00
Adrian Conlon
dc477cd050 Use explicit enumeration types (improves type safety) where appropriate. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-12-01 15:24:29 +00:00
Adrian Conlon
9960ad6012 Tidy return parameter usage a little within the EightBit library. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-29 00:09:40 +00:00
Adrian Conlon
deb9a6d43c Correct more analysis problems. No functional changes. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-28 21:27:14 +00:00
Adrian Conlon
a673a64c3f Lots of various changes suggested by the code analysis tools. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-27 22:36:54 +00:00
Adrian Conlon
e156b1ff1a Correct some more compilation warnings (across the whole EightBit project). 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-25 19:02:11 +00:00
Adrian Conlon
887b89308a Ensure virtual methods are no longer defined inline. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-25 10:43:51 +00:00
Adrian Conlon
000b254d2a Tidy some white space issues a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-24 10:56:36 +00:00
Adrian Conlon
e2e7fd0e00 Merge branch 'master' of https://github.com/MoleskiCoder/EightBit 2018-11-16 23:50:04 +00:00
Adrian Conlon
5530522f11 Correct a couple of small issues 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-16 23:49:52 +00:00
Adrian Conlon
fdbb28828f Apply the concept of powered components to the "board" 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-11 16:48:44 +00:00
Adrian Conlon
e688411cb9 Refactor memory related code a little to make the hierarchy of classes a little easier to understand. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 16:38:57 +00:00
Adrian Conlon
9132f2028f Add an "UnusedMemory" class to better allow "gaps" in the memory map. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-03 23:11:48 +00:00
Adrian Conlon
984626a331 Introduce the concept of a MemoryInterface to the EightBit library. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-03 22:15:17 +00:00
Adrian Conlon
68a785ceec Add an address masking to the memory mapping structure. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-01 23:43:29 +00:00
Adrian Conlon
62f3cd717b First set of C++17/14 changes to the core library 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 17:30:23 +01:00
Adrian Conlon
4bfb264380 Simplify chip pin level matching a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-21 19:42:20 +01:00
Adrian Conlon
1b2ddd8843 Don't expose the bus via the CPU any more: if a component needs the bus, it should be prepared to hold a reference to it. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-20 20:52:41 +01:00
Adrian Conlon
7e527ff093 Add Processor::pokeWord to define an endian specific 16-bit word write. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-14 10:05:43 +01:00
Adrian Conlon
8d3551e681 Refactor bit set/get routines from processor class to lower level chip class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 14:08:44 +01:00
Adrian Conlon
d77c2a1e9d Add more of the MC6850 internals. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-23 20:31:55 +01:00
Adrian Conlon
754fc8e6a3 Refactor the processor class to give us a "Chip" class that gives up pin levels and power. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-23 13:10:58 +01:00
Adrian Conlon
7adefd380a Sort a bunch of missing argument const specifications. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-21 00:16:00 +01:00
Adrian Conlon
fe3794e011 Simplify register16_t usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-16 12:00:29 +01:00