transistor
1a28208784
Added more Z80 instructions
2021-11-04 21:30:33 -07:00
transistor
7d2a4e4b44
Fixed m68k overflow flags (almost)
2021-11-04 21:29:52 -07:00
transistor
8ba506cc11
Added tracing mode to debugger
2021-11-04 13:32:51 -07:00
transistor
2cb21d7b8d
Fixed a number of instruction bugs with m68k
2021-11-03 23:55:50 -07:00
transistor
b6cccea437
Added read only memory and debugger numbered continuations
...
There is also a breakpoint error, so that if a read-only memory
location is written to, it will escape to the debugger rather than
exiting the program.
2021-11-03 15:33:22 -07:00
transistor
bd5a798fa1
Fixed bug in ADDA/SUBA instructions
2021-11-03 15:30:38 -07:00
transistor
dc25a9f171
Started filling in Z80 execution
2021-11-02 20:58:03 -07:00
transistor
a87aab9b70
Modified write_beu*() functions and added little endian versions
2021-11-02 20:33:27 -07:00
transistor
e0ef1d8fd9
Added start of Z80 decoder
2021-11-01 22:06:40 -07:00
transistor
58fc9ac827
Moved the debugger out of m68k
2021-11-01 16:51:45 -07:00
transistor
a3a11f7459
Fixed some sprites issues
2021-10-31 23:01:56 -07:00
transistor
8fe76334af
Added joystick host adapter
2021-10-31 11:00:14 -07:00
transistor
a02d8e5241
Fixed graphics finally for YM7101 scrolls
2021-10-30 16:17:28 -07:00
transistor
93c080eae6
Fixed interrupts
...
Previously the m68k wasn't masking interrupts with an equal priorty.
I also modified how they work, such that the cpus will check the
controller rather than wait for the notification call
2021-10-29 22:02:29 -07:00
transistor
c1ca666aa4
Simplified event queue
2021-10-29 20:06:15 -07:00
transistor
250c0e83d2
Minor fixes
2021-10-29 15:05:41 -07:00
transistor
aa9aeaf3b4
Movied computie binaries to their own directory
2021-10-27 21:04:24 -07:00
transistor
109ae4db55
Added minifb frontend with very WIP genesis peripherals
2021-10-27 21:01:18 -07:00
transistor
892f93f053
Added BusPort to more accurately emulate the bus requests of the 68k
...
The BusPort is created before the CPU and is passed to it. It can
have an offset, limit the address sizes, and break up bus request
beyond a certain number of bytes into multiple requests
2021-10-26 21:32:25 -07:00
transistor
8bbffbe34c
Modified the read interface yet again
2021-10-26 17:33:23 -07:00
transistor
1ad7ad1807
Added Debuggable trait and added tests
2021-10-26 12:17:59 -07:00
transistor
c980c2f56d
Added WIP
2021-10-25 19:31:28 -07:00
transistor
0b17b0fc8c
Modified timer to store its own start time
2021-10-25 19:29:39 -07:00
transistor
089f25903b
Added adjustable frequency to m68k, and added log levels
2021-10-25 10:29:13 -07:00
transistor
fd894f0638
Modified to use a nanosecond clock
2021-10-23 22:22:02 -07:00
transistor
2ed528a140
Modified the PTY implementation to be use channels
2021-10-22 19:36:05 -07:00
transistor
447b3727ed
Fixed bug in DIVW instruction
2021-10-22 13:02:48 -07:00
transistor
f9e018742b
Refactored how UI interfacing will work
2021-10-21 21:55:27 -07:00
transistor
fab763a867
Added rough host window updating options for future reference
2021-10-21 20:59:26 -07:00
transistor
8d39d84545
Refactored to separate out the commands, and machine configs
...
Machine definitions are now in their own module and can be
optionally compiled in, and there is now a console and soon
to be gui version of the compiled binary, with individual
binaries for each machine
2021-10-20 15:53:25 -07:00
transistor
e81a5d430a
Fixed some bugs and added the ROXd instruction
2021-10-19 19:50:42 -07:00
transistor
3579529764
Minor fixes and refactoring
2021-10-19 11:33:51 -07:00
transistor
492027fa7a
Fixed a bug in bit field instruction decode
...
We were trying to decode the effective address before fetching the
second instruction word for bitfield instructions, which was causing
it to use the wrong word for the offset:width information, which was
preventing the shell from printing to the screen after boot
2021-10-18 21:41:42 -07:00
transistor
2d8e5f6359
Added support for long word MUL and DIV instructions
2021-10-18 21:22:57 -07:00
transistor
b88b0a890c
Updated tests for new addressing modes
2021-10-18 16:34:55 -07:00
transistor
731c89845e
Added MC68020+ addressing modes
2021-10-18 15:44:42 -07:00
transistor
3fc76335d0
Moved m68k instruction types to their own file
2021-10-18 12:05:10 -07:00
transistor
32d2d591ce
Added bit field instructions, and fixed some bugs
2021-10-17 21:18:59 -07:00
transistor
758621c410
Fixed bug in indexing modes
2021-10-17 11:13:46 -07:00
transistor
1262cbd8c0
Modified to use a common trait to derive other traits
2021-10-17 10:39:43 -07:00
transistor
4bdbe7c7f0
Refactored a bit
...
Now all traits are in the devices file, and host adapters will be
in under src/host/.
2021-10-16 20:30:50 -07:00
transistor
93c9307829
Moved I/O to a separate thread
...
but I'm not happy with it, and will likely change it in future,
possibly to use two threads and two sets of channels to pass chars
back and forth
2021-10-16 16:11:50 -07:00
transistor
853626584e
Once again modified how the memory addressing works
2021-10-16 10:58:27 -07:00
transistor
24e050a840
Added supervisor checks
2021-10-16 10:01:14 -07:00
transistor
ffd4faa9a3
Fixed decode of EXT, and fixed some bugs with 020+ code
2021-10-15 14:37:31 -07:00
transistor
1732c90f5b
Added formatter for Instruction to output assembly
2021-10-15 11:12:47 -07:00
transistor
eba1f9c9fc
Fixed bug with ANDtoSR, which was actually using "or"
2021-10-14 22:04:14 -07:00
transistor
72457aca5c
Minor changes
2021-10-14 21:53:42 -07:00
transistor
43b1abfa19
Minor changes
2021-10-14 21:16:31 -07:00
transistor
e558fc01bf
Refactored and fixed some warnings
2021-10-11 15:16:04 -07:00
transistor
91825e1cb9
Added a bunch of unit tests
2021-10-11 15:04:39 -07:00
transistor
39ecd1b0d9
Added decode for ABCD and SBCD
2021-10-10 20:47:51 -07:00
transistor
94141e112e
Reorganized decode and add some support for other m68k processors
2021-10-10 14:26:54 -07:00
transistor
b588563acc
Updated readme
2021-10-09 20:35:52 -07:00
transistor
fbb5153121
Refactored mc68681 to make a common port struct and fixed a bug in DIV
2021-10-09 17:35:23 -07:00
transistor
f0637e81f1
Added separate interrupt controller
2021-10-09 11:00:32 -07:00
transistor
c4f41d73ab
Put the types and traits from system into new devices file
2021-10-08 23:11:52 -07:00
transistor
8bb43f61ee
Fixed interrupts and added tx enable for OS buffered output
2021-10-08 10:52:15 -07:00
transistor
ecbaf6a68b
Added interrupt triggering from mc68681
2021-10-07 13:57:50 -07:00
transistor
7bd7f3e64f
Added cpu to system, and refactored m68k a bit
2021-10-07 11:35:15 -07:00
transistor
73d11ddb79
Switched to using Rc<RefCell<Box<dyn Trait>>> for devices
2021-10-07 09:41:01 -07:00
transistor
e186637f49
Refactored such that System is the top level object
2021-10-06 16:14:56 -07:00
transistor
5ea2ccc128
Added TRAP instruction and exception handling
2021-10-05 21:53:18 -07:00
transistor
59019d9c8e
Refactored address space again
2021-10-05 19:58:22 -07:00
transistor
f2a23a21cb
Added ROd instruction and fixed bug with MOVEM
2021-10-05 16:22:21 -07:00
transistor
f5283730c2
Added start of ata device
2021-10-04 13:02:58 -07:00
transistor
e561c533ef
Added stack tracer and fixed bug with CMPA instruction
2021-10-04 11:13:10 -07:00
transistor
2f54c18fcf
Modified memory operations to be simpler
2021-10-03 21:05:10 -07:00
transistor
dd21771bb3
Added better processing of debug commands, and timers
2021-10-03 20:45:50 -07:00
transistor
338e68a1d9
Fixed some erroneous instruction decodes and added binaries
2021-10-03 09:55:20 -07:00
transistor
10e905674b
Added MUL, DIV, NEG, DBcc, and Scc instructions, and fixed issue with ADD/SUB flags
...
With ADDA, SUBA, and ADDQ/SUBQ when the target is an address register, the condition
flags should not be changed, but the code was changing them, which caused problems.
I've fixed it by making the ADD/SUB executions check for an address target and
will not update flags in that case. This should only occur when the actual instruction
was an ADDA or ADDQ with an address register target
2021-10-02 21:59:28 -07:00
transistor
98883e3daa
Added the Asd, LINK, and UNLK instructions
2021-10-02 15:35:08 -07:00
transistor
80c8fe9797
Fixed bug with PC offsets and the value of PC when calculated
2021-10-02 09:48:21 -07:00
transistor
4b577ad403
Separated debugging code into its own file
2021-10-02 09:35:25 -07:00
transistor
38bcf0af3f
Reorganized state and decoding into their own structs
2021-10-02 08:47:20 -07:00
transistor
f453e6dde2
Fixed bug in MOVEM and added multiple breakpoints
2021-10-01 22:06:53 -07:00
transistor
b0f094cb59
Added start of a testsuite
2021-10-01 19:27:05 -07:00
transistor
3c4e69378a
Fixed pty code to actually read input
2021-10-01 17:53:55 -07:00
transistor
a5cac4d309
Fixed indexing, flags, and added logical shift
...
The effective modes that used signed offsets were not properly
sign extending the immediate or register index values before adding
them to the address, resulting in incorrect addresses.
The flags were incorrect for some instructions, and I added the
logical shift instruction implementation
2021-10-01 15:38:21 -07:00
transistor
f7529bbb41
Added PTY terminal for I/O via the MC68681 module
...
Also fixed a bug where MOVEA needs to behave differently than MOVE,
such that the data is sign extended to a long and the condition flags
are not changed. I also modifed how Addressable returns data because
I need to return owned data from MC68681, so that the stored data can
be updated (ie. the status flag must be modified after a read)
2021-10-01 12:25:23 -07:00
transistor
01b4bdf859
Added bit test instructions and got boot message working
2021-09-30 20:27:01 -07:00
transistor
7868bc3014
Fixed instruction decode for MOVEM and EXT
...
It's now possible to run the monitor program until it loops waiting
for the serial transmitter to be ready for writing
2021-09-30 15:15:23 -07:00
transistor
e40663ee9a
Fixed conditionals and split decode and execute cycles for debugging
2021-09-30 12:58:11 -07:00
transistor
b7148d3b06
Added serial device
2021-09-29 23:21:11 -07:00
transistor
92342c23ed
More instruction execution, enough to loop
...
I'm using the monitor.bin binary built from computie to boot the
virtual machine, and it currently runs and loops, but there is no
actual serial device, so it's hard to tell if it's working correctly
2021-09-29 21:52:38 -07:00
transistor
9095333793
Reorganized and started working on the execution code
2021-09-29 17:11:48 -07:00
transistor
f22aa23dfa
Completed most of the instruction decode
2021-09-29 12:24:04 -07:00
transistor
6a4f53ca2b
Initial start with some structure for instruction decoding
2021-09-28 16:09:38 -07:00
