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fc7b6e49ca
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129 Commits

Author SHA1 Message Date
Adrian Conlon
fc7b6e49ca Slightly nicer refactoring of the MEMPTR post increment saga 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-28 13:33:36 +00:00
Adrian Conlon
b3faae34ae Correct a couple of problematic changes picked up by fuse test 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-28 09:42:04 +00:00
Adrian Conlon
fac2da9ac4 Start refactoring CPU cores to use C++17/14 features. (This commit covers the 6502 and Z80) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 18:41:55 +01:00
Adrian Conlon
8dbb3eafec Switch to C++17 standard in all EightBit projects. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 14:28:14 +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
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
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
Adrian Conlon
7d840f1a42 Modifying the manner in which memory is mapped, allows a fairly clean mechanism for loading Intel "hex" files. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-15 14:35:59 +01:00
Adrian Conlon
97272d650d Simplify processor bus access a little by further allowing register16_t address access. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-29 13:52:25 +01:00
Adrian Conlon
a8cc289149 Whoops: The "Bus" class *really* isn't allowed to know the "endianness" of the attached processor! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 11:27:33 +01:00
Adrian Conlon
3a4235f651 Whoops: The NMI line needs to be powered on by individual processors now it's no longer part of the Processor base class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 22:50:18 +01:00
Adrian Conlon
1212e8d4f0 Tidy some processor virtual specifications. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 13:35:53 +01:00
Adrian Conlon
c105ee37bf Have a stab at sorting out processor pin handling. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 12:09:26 +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
677b9a608e Default a couple of project configuration options. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-17 14:02:00 +01:00
Adrian Conlon
ed76038bfa More memptr adjustments 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-17 13:59:59 +01:00
Adrian Conlon
256e25e344 Tidy up the test suite usage between the 8080 and Z80 processors. 2018-08-12 16:30:32 +01:00
Adrian Conlon
228301573e Refactor Z80 block in/out routines. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-12 16:25:30 +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
e40240694f More removal of duplicated code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-24 22:33:02 +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
757d8f3c32 Reduce code density a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-16 10:09:28 +01:00
Adrian Conlon
7d25962f3c Remove commented block. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-16 09:56:16 +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
7cb5e137f4 Some small simplifications of the 16-bit arithmetic operators. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-11 23:01:48 +01:00
Adrian Conlon
2d8c3d4b12 Simplify AF usage. Keeps speed roughly as before 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-11 00:50:46 +01:00
Adrian Conlon
fbf098ae00 Simplify memory event handlers and ROM recognition a little (bit of speed difference) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-10 22:00:52 +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
116f9961c4 Add a higher/lower nibble mask 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-25 22:36:10 +01:00
Adrian Conlon
9de0f597f6 Remove some "tricksy" code from the Z80 emulator chain. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-04-14 09:39:06 +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
d818095815 MEMPTR is really only a concept of Intel style processors. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-18 22:40:23 +00:00
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
bebc68539b Correct sneaky reference passing in heavily used method. (~205Mhz emulated speed) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-10 10:53:11 +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
c6eb68ba13 Further return by value, rather than reference. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-02-26 19:47:35 +00:00
Adrian Conlon
adf506a41e Optimisation: Prefer return by value to return by reference. ~10% speed-up! 
Just watch a video by Chandler Carruth from 2015, where he talked about C++ optimisers...

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-02-25 19:48:01 +00:00
Adrian Conlon
d34b161255 Simplify some build options. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-02-19 23:18:21 +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
3bd01e211e Try to avoid so many virtual calls in the Z80 by hanging onto AF a little longer. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-01-09 23:30:51 +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
3d88a8f6d1 Couple of small changes in LIKELY/UNLIKELY usage. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-05 21:40:23 +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
f1b3fc1932 Correct at least some of the problems with the Z80 interrupt rewrite 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-04 21:59:38 +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
55b989fe13 More likely/unlikely macro usages. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-02 14:53:35 +00:00
Adrian Conlon
9cbf76daf2 Correct a couple of LIKELY/UNLIKELY usages. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-02 10:34:37 +00:00
Adrian Conlon
dc58969614 Whoops: missed Z80 test Makefile. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-11-30 15:02:58 +00:00