Peter Evans
8ad1311536
Add set_memory function
2018-01-06 21:37:15 -06:00
Peter Evans
d9527db033
Retrieve the 16-bit PC address.
...
This fixes a bug where we only got an 8-bit address from $FFFC and
ignored the LSB at $FFFD.
2018-01-05 16:15:13 -06:00
Peter Evans
70516a7f91
Add function to return 16-bit value from a segment address
2018-01-05 16:14:51 -06:00
Peter Evans
c6799db689
Separate reset logic from boot function
2018-01-05 16:04:01 -06:00
Peter Evans
af7dae6924
Advance PC by # of bytes consumed
2018-01-05 15:52:20 -06:00
Peter Evans
7ceee608b3
Stop delaying by 2 seconds
2018-01-05 15:52:04 -06:00
Peter Evans
c7aa9e9fc3
Resolver may be NULL; don't call if so
...
This change also registers a default value for operand (0).
2018-01-05 14:57:38 -06:00
Peter Evans
d5b6205713
Actually execute some opcodes
2018-01-05 14:55:33 -06:00
Peter Evans
fd8f36b34e
We need to use the mach cpu
2018-01-05 14:19:13 -06:00
Peter Evans
1de1e7788a
Rename status flags to MOS_
2018-01-05 14:18:39 -06:00
Peter Evans
2da613f7aa
Provisional state upon reboot
2018-01-04 20:09:53 -06:00
Peter Evans
3f0a091520
Use const pointers; fix function name typo
2018-01-04 19:59:04 -06:00
Peter Evans
700bc31465
Copy system rom into $C800..$CFFF; document.
...
Things are getting a little hairy...at least, as to my own
comprehension. Documentation is a must.
2018-01-04 19:53:12 -06:00
Peter Evans
e184304ec5
A little more documentation post-rwops changes
2018-01-04 14:21:05 -06:00
Peter Evans
171ff62551
Change create to use objstore vm_8bit data
2018-01-03 21:50:30 -06:00
Peter Evans
565dd1b34b
Make sure the object store got built
2018-01-03 21:50:01 -06:00
Peter Evans
06d37d24d7
Allow us to call objstore_init more than once.
...
This also separates some code into objstore_ready().
2018-01-03 21:49:26 -06:00
Peter Evans
7182608473
Copy vm_8bit buffer into rom/memory directly
2018-01-03 21:10:46 -06:00
Peter Evans
90d6c637c5
Add function to copy a buffer into a segment
2018-01-03 21:10:25 -06:00
Peter Evans
4d07bd7640
Add objstore code, tests
2018-01-03 20:51:20 -06:00
Peter Evans
b1c2a2109e
Just use stdout if we never opened a log file
2018-01-03 20:47:41 -06:00
Peter Evans
484a11e976
Pass in zero for an offset
2018-01-03 15:21:00 -06:00
Peter Evans
fac6b4f574
Initialize system and disk2 rom
2018-01-03 15:20:48 -06:00
Peter Evans
86dad129b6
Let us fread into a segment offset
2018-01-03 15:16:30 -06:00
Peter Evans
e7a404508e
Add init functions for disk2, sys rom
...
Also move the defines for bank offset, rom size, etc. into apple2.mem.h
which makes a little more sense.
2018-01-03 15:07:19 -06:00
Peter Evans
5b2c376abc
Prevent writes to the ROM bank
2018-01-03 14:27:55 -06:00
Peter Evans
9a1e51fec3
We need to pass the machine, not memory
2018-01-02 23:49:29 -06:00
Peter Evans
cb9a7d0fce
Let the segment vm know about the machine
2018-01-02 21:12:21 -06:00
Peter Evans
ee7b5f66b0
Add support for a map machine pointer
...
To be sent to the read/write functions that are implemented by said
machine.
2018-01-02 21:11:43 -06:00
Peter Evans
3fe7a4e0bb
Use explicit memory size of MOS6502
2018-01-02 20:48:42 -06:00
Peter Evans
73f7d8f63a
Actually map memory when we create an apple2
2018-01-02 16:30:21 -06:00
Peter Evans
33c8f0de9d
Add memory map functions
2018-01-02 16:26:51 -06:00
Peter Evans
834959c10a
Add rom, ram2 bank memory; modify read/write sig
...
The signature for read/write map functions now accepts a void pointer so
that we can pass in the machine that those functions may need to know
about. This is a bit hairy, but allows us to avoid the need for a
yet-uglier global variable.
2018-01-02 16:24:51 -06:00
Peter Evans
49d475d534
Documentation
2018-01-01 17:41:15 -06:00
Peter Evans
d53b6df7a4
Add documentation; plus set sector/track pos to 0 on eject
2018-01-01 17:26:29 -06:00
Peter Evans
2aeef09f97
Remove unused msb variable
2018-01-01 17:12:41 -06:00
Peter Evans
8f04deb642
Comment out unused cycles variable
2018-01-01 17:12:25 -06:00
Peter Evans
78aab1bd13
Fix potential memory leaks in create()
2018-01-01 17:11:03 -06:00
Peter Evans
a2b4fe1466
Write an fread function for segments; use in apple2.dd
2017-12-31 20:28:11 -06:00
Peter Evans
e14e22a596
Uh, so we forgot to read data into the disk
2017-12-31 15:54:30 -06:00
Peter Evans
f70f21789b
Add flash memory, disassemble options
2017-12-31 15:50:59 -06:00
Peter Evans
ead5f28e79
Refactor to use cpu, not literal segments
2017-12-30 23:02:30 -06:00
Peter Evans
b42d5370aa
Small bug in the jump label code for IND
...
This also required a rethink on some core functions which now needed to
know about the memory segment; and further changes in the unit-testing
code on the disassembly suite was also necessary.
2017-12-30 22:50:23 -06:00
Peter Evans
7e142e2736
Properly handle indirect addresses
2017-12-30 21:48:16 -06:00
Peter Evans
26529f77ab
Implement jump table, labels in code
2017-12-29 17:08:25 -06:00
Peter Evans
927d03ebbe
Add scan function (rename original scan -> opcode); test
2017-12-29 15:31:05 -06:00
Peter Evans
f98e2f65ee
Add disassembly scan function, tests
2017-12-28 23:47:36 -06:00
Peter Evans
491b3c0c38
Add scan function for disassembly
2017-12-28 21:47:35 -06:00
Peter Evans
d95572bd4a
Move instruction strings to mos6502.dis.c
2017-12-27 21:21:33 -06:00
Peter Evans
32d08fbbc5
Add new file for opcode disassembly
2017-12-27 21:21:11 -06:00
Peter Evans
6a230341e1
Make vm_area_set be an inline function.
...
Gets most of the benefits of being a macro, but also gains type safety
(which macros do not have).
2017-12-27 17:10:51 -06:00
Peter Evans
30223e0bca
Remove screen area field; document area fields
2017-12-27 16:59:56 -06:00
Peter Evans
27f91ec00f
Use vm_area with bitfont_offset
...
This should further standardize on vm_area.
2017-12-27 16:47:26 -06:00
Peter Evans
efb8f04555
Use vm_area for draw_rect.
...
This simplifies and to some degree normalizes the way we reference areas
in the vm subsystem.
2017-12-27 16:42:30 -06:00
Peter Evans
c7b830bb4a
Switch references from SDL_Rect to vm_area
...
We still use SDL_Rect internally, but we want to abstract the use of it
in our API. The only thing the rest of the app should care about is the
vm_area struct.
2017-12-27 16:31:02 -06:00
Peter Evans
5407ce2d32
Add documentation for option functions
2017-12-27 14:32:13 -06:00
Peter Evans
76191991c8
Add a lot of missing documentation
2017-12-27 01:14:52 -06:00
Peter Evans
f8ce9ae1d1
Documentation
2017-12-26 17:13:34 -06:00
Peter Evans
8146687110
Don't create a window when testing
...
We do this by creating the notion of a "headless" mode, and skip window
creation in SDL.
2017-12-26 17:06:08 -06:00
Peter Evans
253db81460
Comment out unused instruction string table
2017-12-26 16:45:24 -06:00
Peter Evans
81804532df
Reorganize log.c
2017-12-26 16:44:28 -06:00
Peter Evans
a86fc8e80e
Reorganize
2017-12-26 16:42:04 -06:00
Peter Evans
f5af03786d
Reorganize
2017-12-26 16:39:23 -06:00
Peter Evans
f50d599545
Beginnings of lo-res graphics
2017-12-24 15:07:24 -06:00
Peter Evans
7b19279f1d
No need for this comment any longer
2017-12-22 20:45:26 -06:00
Peter Evans
4ad690212f
Blank out the space we want to render a character
2017-12-22 17:49:36 -06:00
Peter Evans
29652b2368
Implement draw text functionality
2017-12-22 15:48:48 -06:00
Peter Evans
b2c1bd9e6d
Hello world, in rendered text; use nearest pixel sampling
...
The scale change removes some blurriness that we saw when copying pixels
from the bitmap font into the renderer.
2017-12-22 12:56:22 -06:00
Peter Evans
979ca65f43
Add bitmap font to apple2, remove rectangle draw
2017-12-21 23:33:04 -06:00
Peter Evans
adac6346e8
Add color mode, text video modes
2017-12-21 11:52:56 -06:00
Peter Evans
87b67216b0
Default to lo-res mode
2017-12-20 21:54:54 -06:00
Peter Evans
23e113e72a
Add video mode switcher to handle logical sizes
2017-12-20 21:52:28 -06:00
Peter Evans
7d62548248
Add the bones of the draw functions and file
2017-12-20 21:33:15 -06:00
Peter Evans
f55b608bee
Move screen run logic into apple run_loop and create
2017-12-20 20:45:26 -06:00
Peter Evans
8c23f3fa7e
Switch window sizes for 4.375:3
2017-12-20 19:32:54 -06:00
Peter Evans
53db99f4fd
Use size options for window
2017-12-20 17:08:19 -06:00
Peter Evans
609e3eea7c
Add size option, functions to get width and height
2017-12-20 17:06:03 -06:00
Peter Evans
b1c146c62d
Add ability to set logical size of window at any time
...
We also removed the scale field, as the screen does not expect to manage
its own logical coordinates in SDL.
Additionally, we added an xcoords and ycoords function to the screen
externs so that you don't have to "know" that screen has those as
fields.
2017-12-20 16:44:24 -06:00
Peter Evans
f31fcd9c37
Add support for vm_bitfont
2017-12-19 21:50:50 -06:00
Peter Evans
05a641c8f6
Use SDL's render logical size feature
...
This allows us to work with the pure x/y coordinate system we set when
creating the vm_screen. SDL will take care of the translation of those
coordinates to whatever the window size is.
2017-12-18 14:32:15 -06:00
Peter Evans
4ef9e50792
Really basic implementation of SDL2.
...
Plus a crappy rectangle to prove that our vm screen code is working in
principle. (It will be removed shortly.)
2017-12-17 23:31:56 -06:00
Peter Evans
ad37d59b2d
Remove references to OpenGL/GLFW/GLEW
2017-12-17 20:20:11 -06:00
Peter Evans
afa07e346f
A few comments
2017-12-17 19:22:33 -06:00
Peter Evans
83dcfaf646
Add glew, defines for width/height
2017-12-17 19:09:54 -06:00
Peter Evans
a73c15c37c
Rename vm_screen_context to vm_screen
2017-12-17 16:42:05 -06:00
Peter Evans
8beb761535
Actually show a window.
...
This is also the beginning outline of how we want to abstract graphics
away in erc.
2017-12-16 23:38:59 -06:00
Peter Evans
b646bfc511
First stab at adding graphics.
...
This involves using glfw. This first commit creates a window but doesn't
do anything with it; it also just hangs until you can escape out
somehow.
2017-12-16 22:45:39 -06:00
Peter Evans
294fab76aa
Add boot function; modify main to use apple2 boot
2017-12-15 22:22:40 -06:00
Peter Evans
3f3210205f
We missed the size multiplier for memset()
...
In doing so, only a small portion of memory would have reliably been set
to zero; specifically, just the first element!
This change should resolve some intermittent test failures to guarantee
that all memory be zeroed.
2017-12-15 21:22:22 -06:00
Peter Evans
ed1a7b3278
Rename to read/write (without byte)
2017-12-15 21:03:38 -06:00
Peter Evans
b07848dd9d
Change name; move 140k, 240k
2017-12-15 21:00:59 -06:00
Peter Evans
06c8d623e7
Move MAX_SECTOR_POS and change shift into a while loop
2017-12-15 16:52:47 -06:00
Peter Evans
079a35507c
A number of updates in heavy dev phase
...
1. Add an insert function (to insert a new disk).
2. Add a new shift function to coordinate sector position updates when
reading or writing.
2017-12-15 16:45:20 -06:00
Peter Evans
256e0cf1d6
Don't write to the log stream if null
...
This prevents a somewhat vexing crash condition from happening.
2017-12-15 16:28:14 -06:00
Peter Evans
4dffea1dda
Make position non-static; add case for NULL data
2017-12-14 23:08:33 -06:00
Peter Evans
f629b350fa
We can't have a negative track pos; zero is the lowest
2017-12-14 22:46:50 -06:00
Peter Evans
82d22c8fab
Change name of header file in #include
2017-12-14 22:27:45 -06:00
Peter Evans
091939b06b
Renaming files
2017-12-14 22:24:30 -06:00
Peter Evans
24e599a8fd
Rename to apple2dd; add read/write functions
2017-12-14 22:14:55 -06:00
Peter Evans
0162544fa6
Add initial struct and drive code
2017-12-13 20:30:32 -06:00
Peter Evans
577e92de9e
Documentation is good. Write documentation.
2017-12-12 15:10:42 -06:00
Peter Evans
7da3c2ec20
Make use of our read/write mappers
2017-12-12 15:00:47 -06:00
Peter Evans
e019b6daee
A warning to the concerned
2017-12-12 14:59:00 -06:00
Peter Evans
7da2f9e791
Add support for setting read/write map functions
2017-12-12 14:58:06 -06:00
Peter Evans
bb92162dba
Zero, not NULL.
...
Not that there's a practical difference, but we should be clear that
we're zeroing out memory because its contents are vm_8bit values, not
pointers.
2017-12-12 14:45:48 -06:00
Peter Evans
da62ac4ca6
Use double-slash comments
2017-12-12 14:35:13 -06:00
Peter Evans
6f4627802f
We should also NULL out segment memory.
...
Er... oops
2017-12-12 14:33:55 -06:00
Peter Evans
06705f21fc
Add mallocs for read/write tables, NULL-out code
2017-12-12 14:32:32 -06:00
Peter Evans
daab8a7f58
Add instruction strings (mapped to enum symbols)
2017-12-11 21:03:16 -06:00
Peter Evans
850fdc55b5
Add error codes to segment functions
2017-12-09 15:16:56 -06:00
Peter Evans
f44b029083
We need to check P's value as well
...
This test broke once we began to (properly) push P onto the stack.
However, I'm not _clear_ on whether we should push P before or after we
set the INTERRUPT bit... We'll go with things as-is for now.
2017-12-09 14:50:33 -06:00
Peter Evans
3954b1647f
Missing status modifications in a number of instructions
2017-12-08 23:26:46 -06:00
Peter Evans
b0aa6d400a
We should be pushing and popping status
2017-12-08 23:24:58 -06:00
Peter Evans
0336fe7366
Documentation for files
2017-12-08 22:12:31 -06:00
Peter Evans
50563b44a2
Close any open files we have
2017-12-08 17:09:58 -06:00
Peter Evans
cf62694ef0
Add option parsing code, tests
2017-12-08 17:06:21 -06:00
Peter Evans
8cd9c5ffab
Documentation, lacking
2017-12-06 21:25:47 -06:00
Peter Evans
ccd7a3f665
Moar documentation
2017-12-06 18:01:13 -06:00
Peter Evans
fca069d5de
Documentation
2017-12-06 17:16:20 -06:00
Peter Evans
12d0e5403a
Add documentation for the arith instructions
2017-12-06 17:03:37 -06:00
Peter Evans
d0dad61db8
Better documentation; use a macro to define modes
2017-12-06 16:54:14 -06:00
Peter Evans
102378640a
Proper indentation
2017-12-06 16:45:16 -06:00
Peter Evans
ffd2550364
Better documentation; log to stdout
2017-12-06 16:43:30 -06:00
Peter Evans
98f70e0a9a
Add functions for pressing/releasing keys
2017-12-06 15:21:39 -06:00
Peter Evans
0e02fb8a1a
Add struct, initial create function for apple2
2017-12-06 14:36:14 -06:00
Peter Evans
89ddd20658
Add read_byte function to return the next byte in memory
2017-12-05 20:40:35 -06:00
Peter Evans
50a84b4099
Remove cycles field from mos6502 struct
...
It was both unused and not necessary, as we can simply compute the
number of cycles in the execute function.
2017-12-05 20:23:17 -06:00
Peter Evans
5ada987c83
Add the execute function for the 6502
...
This executes a single opcode. Note this also makes a change to the
get_address_resolver function such that accepts an opcode, not the
address mode itself.
2017-12-05 19:01:43 -06:00
Peter Evans
eaaf63a069
Zero out last_addr and cycles
...
This fixes a super-annoying bug in the unit-test suite where we would
fail randomly because sometimes last_addr would have garbage in it.
2017-12-05 18:41:34 -06:00
Peter Evans
8454d1a6c9
Add instruction handler function, handler table
2017-12-05 18:38:36 -06:00
Peter Evans
54473be302
Add functions for instructions, cycles, and address modes.
...
This also adds a new table for cycles, and adds unit test functions for
the work as well.
2017-12-04 23:30:18 -06:00
Peter Evans
87de0a877a
Add all our tests, plus other fixes
2017-12-03 20:19:17 -06:00
Peter Evans
fe9ce3aca3
Tests for the new mos6502 functions
2017-12-02 13:27:30 -06:00
Peter Evans
3cebed2377
Adding all of the instruction files
2017-12-02 13:05:53 -06:00
Peter Evans
237d5e3cb6
First commit
2017-11-21 23:24:51 -06:00
