6502/EightBit
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70 Commits

Author SHA1 Message Date
Adrian Conlon
22506ea56c Extensive change warning: lots of "noexcept" and "constexpr" changes. Not sure if I'll keep all of them, but interesting... 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2021-07-18 14:28:40 +01:00
Adrian Conlon
2f76e901f9 More tidying of include files for VS2019 compatibility (plus more correct!) 
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
 2021-05-29 12:18:13 +01:00
Adrian Conlon
a37601df67 Correct recently introduced IO implementation issues in the 8080 core. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2020-02-13 09:17:52 +00:00
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
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
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
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
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
ed47983928 Speed up the Intel 8080 disassembler. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-03-02 21:41:06 +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
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
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
b9ca27feb3 Refactor the Intel 8080 core for C++17/14 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 18:51:30 +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
6d4223c368 Start moving towards reset being just another style of interrupt. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 01:34:30 +01:00
Adrian Conlon
70c70af969 Sort out some exception and member initialisation rules. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-11 21:19:19 +01:00
Adrian Conlon
cac871cf2b Remove duplicated code (from const definitions) the performance benefit isn't worth the amount of duplicated code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-24 20:58:20 +01:00
Adrian Conlon
67487b5b6e Simplify the usage of the register16_t union. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-16 00:55:32 +01:00
Adrian Conlon
89632774a7 Bring closer to the Z80 implementation again. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-11 23:02:27 +01:00
Adrian Conlon
3e854c7c49 Const some more bus/processor usage, and ensure the data bus is a member, not a reference to memory. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-10 00:40:56 +01:00
Adrian Conlon
4b4f6b1a49 Some *small* consistency changes. Perhaps some performance gains. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-04-11 23:53:26 +01:00
Adrian Conlon
97a121b8d4 Unneeded UNREACHABLEs can cause gcc to produce problematic code. TBC 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-17 23:34:27 +00:00
Adrian Conlon
dac58b121a More small tidyups in the core emulator set. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-12 01:22:28 +00:00
Adrian Conlon
45dc274167 Get rid of wrappers for bus access: i.e. make it clearer where the bus is being read/written. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-10 01:53:57 +00:00
Adrian Conlon
29edc46966 Simplify some MEMPTR usage in Intel processors. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-01-10 23:08:14 +00:00
Adrian Conlon
1edabd79f3 More pinout oriented method of executing instructions (especially interrupts) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-10 21:41:48 +00:00
Adrian Conlon
6a47f710b9 More consistency updates between i8080 and Z80. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-04 23:41:49 +00:00
Adrian Conlon
23f7a88480 Further 8080/Z80 interrupt rewrite 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-03 00:57:47 +00:00
Adrian Conlon
7e3957d4db Rewrite i8080 interrupts to be more closely related to the hardware. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-02 23:50:59 +00:00
Adrian Conlon
8143f8a506 Try to correct "one definition rule" problems: 
1) No forward declarations
2) No virtual methods defined inline.

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-05 12:47:42 +00:00
Adrian Conlon
c292fb552e A whole bunch of consistency changes. No functional changes. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-03 22:05:01 +00:00
Adrian Conlon
727ef5e86d Tidy Intel8080 header file usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-10-22 21:57:01 +01:00
Adrian.Conlon
64b7335a79 Attempted move to a "BUS" oriented memory architecture (TBC!) 
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
 2017-09-06 13:22:23 +01:00
Adrian.Conlon
8d91260f84 Tidy up some precompiled header usage 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-03 23:51:01 +01:00
Adrian.Conlon
da806bddcb Tidy some more Windows/Linux compatibility issues. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-03 21:30:46 +01:00
Adrian.Conlon
640b2be670 Parts of the EightBit library become linux compatible (TBC!) 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-03 12:11:14 +01:00
Adrian.Conlon
9b43b74c28 Rationalise some of the reset/initialise logic across pProcessor implementations. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-09-01 16:01:40 +01:00
Adrian.Conlon
e70686c5de Some more rationalisation of processor execution/stepping strategies. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-30 23:17:34 +01:00
Adrian.Conlon
91c8855183 Share i8080 and Z80 I/O implementations. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-28 21:41:10 +01:00
Adrian.Conlon
329fd269ed Share some more code from the 6502 processor implementation. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-28 18:52:48 +01:00
Adrian.Conlon
19c0b93262 Changes to the "const"ness of peek necessitate some changes. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-24 11:06:23 +01:00
Adrian.Conlon
016b3bca59 Switch to a memory read/write event driven model. All tests passing. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-08-06 17:06:48 +01:00
Adrian.Conlon
8535efb30d More i8080 and LR35902 consistency. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-25 21:22:15 +01:00
Adrian.Conlon
fbf797a610 More unification of "IntelProcessor" derived classes. This time the i8080. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-25 19:26:21 +01:00
Adrian.Conlon
b6dd48ca63 Some more small clarifications of shared processor implementation. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-25 18:56:43 +01:00
Adrian.Conlon
ff21263b97 Correct a couple of small disassembly issues in the 8080 implementation 
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
 2017-07-25 14:32:31 +01:00
Adrian.Conlon
2ae4e8331e Replace old i8080 disassembler with new (z80) style. 
Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
 2017-07-25 14:12:34 +01:00
Adrian.Conlon
c0c969c560 Use a z80 style instruction decoder for the i8080 emulator. 2017-07-24 22:00:49 +01:00
Adrian.Conlon
8f18a128cd First step of moving to an instruction decoder, rather than a lookup table. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-22 23:52:58 +01:00
Adrian.Conlon
9a264c7c06 Bring the LR35902 and i8080 increment/decrement implementations in line with the Z80. 
Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
 2017-07-22 10:23:13 +01:00