Peter Evans
b1177784a0
Allow access to the last key pressed and key_pressed status
2018-01-16 23:42:10 -06:00
Peter Evans
05e95d7798
Use bitwise OR, not AND, to add flags.
...
This was a copy-n-paste oops. I swear I know how bitwise AND and OR
works. Pinky swear!
2018-01-16 20:51:14 -06:00
Peter Evans
603ad7a036
Begin adding support for memory soft switches
2018-01-16 16:34:38 -06:00
Peter Evans
2c39120098
Rename video_mode -> display_mode
...
This also changes the _kind_ of field from an incrementally enumerated
one to a collection of bit flags.
2018-01-16 16:13:50 -06:00
Peter Evans
bcf6b213a6
Account for changes to rom segment structure
2018-01-16 15:46:35 -06:00
Peter Evans
caea83f9c6
Add missing unit tests for pc mapper functions
2018-01-16 14:22:08 -06:00
Peter Evans
a0a5132099
Add pc file for peripheral card ROM
2018-01-15 23:50:33 -06:00
Peter Evans
2db5c791ba
Remove peripheral rom init
2018-01-15 17:42:27 -06:00
Peter Evans
ac39349344
Reorganize ROM storage
2018-01-15 17:10:27 -06:00
Peter Evans
6cbcf0f9ab
Increase the counter to see more ops running
2018-01-14 22:31:10 -06:00
Peter Evans
be23bb7166
Remove unneeded test stub
2018-01-13 15:57:02 -06:00
Peter Evans
cadc19b3e5
Add display buffer read/write mappers
2018-01-13 15:40:40 -06:00
Peter Evans
45eb7b5e58
Add zero page memory mapper functions
...
This also adds tests for those functions. We have, furthermore, removed
some redundant (and non-externed!) functions from apple2.mem.c which was
the old bank switching code that got moved to apple2.bank.c.
2018-01-13 00:38:29 -06:00
Peter Evans
3738d70a43
Switch bank code into its own file
2018-01-12 22:06:49 -06:00
Peter Evans
208c909fc2
Memory is determined solely by BANK_ALTZP.
...
Previously, we just used whatever the segment was that got passed in.
But aside from switching the stack and zero page, ALTZP also changes
where bank-switchable memory is read from and written to; it's either
always aux memory (ALTZP is on) or always main memory (ALTZP is off).
2018-01-12 21:21:08 -06:00
Peter Evans
c953616a71
Finish refactor to separate bank_switch and memory_mode
...
There is one failing test, which I expect to fail at this point; that's
because we need to write a read/write map function for the stack and
zero page so that they use aux memory when BANK_ALTZP is on, and main
memory when not.
2018-01-12 21:04:21 -06:00
Peter Evans
ceccacfbc8
Rework bank switch and memory mode into their own fields.
...
This is to better define and respect the various modes that you can have
in Apple II memory access. This is a work in progress at the moment.
2018-01-12 16:21:49 -06:00
Peter Evans
647139924b
Small comment
2018-01-12 14:51:00 -06:00
Peter Evans
f69454c965
Some soft switches now require consecutive reads
...
To allow this to work, we had to allow the CPU struct to record what the
last opcode/operand/address were, although in truth we only needed the
last address.
2018-01-12 14:49:27 -06:00
Peter Evans
7d6886a3a8
Change last_addr field to eff_addr
2018-01-12 13:57:48 -06:00
Peter Evans
e56ed9ea43
Add missing docblocks
2018-01-11 22:48:40 -06:00
Peter Evans
a1435de0ad
We weren't noting missing docblock comments.
...
Due to a very python-noob mistake.
2018-01-11 22:42:19 -06:00
Peter Evans
1b2e9d952b
Add missing test code for the aux bank switch
2018-01-11 22:35:23 -06:00
Peter Evans
c4c0312402
Add missing tests for read/write bank switches
2018-01-11 22:24:19 -06:00
Peter Evans
21040898b3
Return, don't break in write mapper; log if we get to the end
2018-01-11 22:23:53 -06:00
Peter Evans
6d21774e78
Add missing tests
2018-01-11 21:58:17 -06:00
Peter Evans
d79bcba5ec
Add missing docblocks
2018-01-11 21:58:05 -06:00
Peter Evans
9564f86a57
Remove flash_memory function
2018-01-11 21:57:52 -06:00
Peter Evans
578e0b291c
Allow us to switch main/aux; write bank switch mappers
2018-01-11 19:52:13 -06:00
Peter Evans
a17ad0596b
Initialize cpu as NULL
...
Static analysis in clang caught this; we might try to free memory from a
garbage pointer value if the main segment malloc fails.
2018-01-11 13:25:22 -06:00
Peter Evans
9d2f9b6f60
Refactor to remove ram2
...
Both main and auxiliary memory need to keep an extra 4k of memory that
is bank-switchable, so we have changed to store that memory literally
within the main and aux segments.
2018-01-11 13:19:17 -06:00
Peter Evans
288b4a9e8d
The boot procedure no longer defaults bank_switch to 0
2018-01-10 21:50:43 -06:00
Peter Evans
81b07361fb
Wait less time for instructions
2018-01-10 21:49:52 -06:00
Peter Evans
fe0ed815a9
Move bank switch set up for the mem init functions.
...
This also changes bank_switch to mirror at boot what the reset function
does later on. Without doing so, our init memory routines will fail.
2018-01-10 21:48:55 -06:00
Peter Evans
24e6e0fd25
Properly free main/aux memory
2018-01-10 21:29:25 -06:00
Peter Evans
8d9b48912e
Add memory injection to 6502; main memory in apple2
...
Note that memory _is_ now managed in apple2, and _not_ in mos6502.
2018-01-10 21:28:05 -06:00
Peter Evans
04854d903c
Add aux memory field
2018-01-10 20:36:44 -06:00
Peter Evans
8898c3e59d
Use macros to define segment read/write map functions
2018-01-10 20:12:48 -06:00
Peter Evans
3db536a83d
Change memory_mode -> bank_switch
...
This also changes the concept of the field; bank_switch is a collection
of bit flags now.
2018-01-10 19:59:33 -06:00
Peter Evans
343d870399
Add missing mach parameter to set_video/set_memory
2018-01-10 16:59:02 -06:00
Peter Evans
538b5ddaa0
Add address for reset vector, applesoft, powerup
2018-01-10 16:47:45 -06:00
Peter Evans
aa486656b3
Set the reset vector to the applesoft interpreter address
2018-01-10 16:47:18 -06:00
Peter Evans
cb53c70cda
We missed a doc-block for the new set16 func
2018-01-10 16:46:55 -06:00
Peter Evans
fcba14f91b
Add set16 function
2018-01-10 16:43:14 -06:00
Peter Evans
6af0ae85a4
Also force bank switch mode back to ROM
2018-01-10 15:16:12 -06:00
Peter Evans
c9188a288d
Reset should change the video mode to 40 column text
2018-01-10 15:14:07 -06:00
Peter Evans
7f6b8d3587
We can no longer assume PC increments during address handling
...
This change required a number of consequent changes to assumptions we'd
made, and I'm not 100% confident we have things right at this point in
time.
2018-01-09 20:59:14 -06:00
Peter Evans
e3ab043aee
We no longer need to pass the opcode here
2018-01-09 20:58:53 -06:00
Peter Evans
80a7671a19
Remove next_byte, read_byte; execute works without an opcode arg
...
This also adds RTS and RTI as instructions that "would jump".
2018-01-09 20:58:19 -06:00
Peter Evans
a785eb5665
Remove next_byte, read_byte; remove opcode from execute
...
The execute function should just work from the PC register. It might
seem to be easier to test by passing an arbitrary opcode into the
function, but because so much of the chip's execution is
context-sensitive (that is, it expects PC to be pointing at the opcode,
to have its operand in front of it, etc.), passing an arbitrary opcode
is not really reflective of what needs to be in place for the function
to work correctly.
2018-01-09 20:56:11 -06:00
