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226 Commits

Author SHA1 Message Date
Peter Evans
a4c3d1c4ef Implement the TRB (Test and Reset Bits) instruction 2018-02-22 00:39:33 -06:00
Peter Evans
807362e871 Add STZ instruction (to store zero) 2018-02-22 00:02:57 -06:00
Peter Evans
8e1ab0e950 Add support for PHX, PHY, PLX, PLY 
These instructions allow you to push and pull (pop) the X and Y
registers via the stack.
 2018-02-21 23:32:57 -06:00
Peter Evans
f9a277e7bc Add new Branch Always instruction 2018-02-21 21:57:21 -06:00
Peter Evans
7b65dc1657 Add new BIM instruction (BIt imMediate mode) 
This is not a real instruction in the 65c02 processor; I invented it for
the sole purpose of handling the specialized logic that is performed by
BIT in IMM mode. To be fair--I can imagine this really _was_ implemented
as a "separate" instruction on the chip! But I don't know that for sure.
 2018-02-21 21:01:46 -06:00
Peter Evans
61eb880f49 Refactor code to pass image type in 2018-02-21 00:23:12 -06:00
Peter Evans
1091ec6e2a Pass image type into enc_dos; use sector_num instead of a table pointer 2018-02-20 15:36:23 -06:00
Peter Evans
98f640f0d1 Use the proper sector header length (20 bytes) 2018-02-20 14:35:07 -06:00
Peter Evans
508be6458a Pass in sector table for logical-physical orders 
We were not encoding data properly, because in DOS 3.3 and ProDOS,
sectors must be interleaved on disk media (whereas in the original image
form, data is laid out in a linear fashion).

This solves a bug where we erroneously encountered a "bad" opcode (a7)
in the program code.
 2018-02-19 18:49:37 -06:00
Peter Evans
96e4b5d9d8 Remove JSR WAIT to speed up disk II controller 2018-02-19 00:48:11 -06:00
Peter Evans
c89e855559 Update to use correct encoded sector length 2018-02-18 23:46:18 -06:00
Peter Evans
3223fe6110 Enable disassembly toggle (ALT+D) 2018-02-07 15:24:02 -06:00
Peter Evans
308a1070ae Add paused field, pause execution 2018-02-07 14:44:04 -06:00
Peter Evans
433d9a436f Add pause function, flesh out machine_info 2018-02-07 14:43:20 -06:00
Peter Evans
a84b4c12e9 Treat pause and disasm as toggle functions 
This allows us to remove the resume and disasm_off functions. (The
disasm_on function is simply renamed to disasm.)
 2018-02-07 14:41:44 -06:00
Peter Evans
360e9243f8 Use the DI container to get machine/cpu/etc 2018-02-07 00:02:20 -06:00
Peter Evans
c35a6cb827 Add VM_OUTPUT DI entry 2018-02-07 00:01:57 -06:00
Peter Evans
09017aa171 Use DI to obtain the reflect struct 2018-02-07 00:01:27 -06:00
Peter Evans
4e0892dc86 Add dependency injection container for vm 2018-02-06 23:24:48 -06:00
Peter Evans
608b2259e5 Break keyboard event logic out into normal/special 2018-02-06 16:29:15 -06:00
Peter Evans
a388cf0158 Add missing param name for reflect struct 2018-02-06 14:26:57 -06:00
Peter Evans
fbee851daf Add apple2 reflect code 2018-02-06 00:30:46 -06:00
Peter Evans
b7f2cabb3e Add new REFLECT macro to allow other code to define funcs 2018-02-05 21:55:13 -06:00
Peter Evans
c1c42834ed Add reflect system to virtual machine 2018-02-05 20:31:05 -06:00
Peter Evans
92ee67c8d8 Allow us to signal that we should exit 2018-02-05 00:35:04 -06:00
Peter Evans
72c4111458 Add event system; move event code into vm_event.c 2018-02-05 00:28:22 -06:00
Peter Evans
7212a1041a Encoded tracks should be longer 2018-02-04 15:41:48 -06:00
Peter Evans
4777886d2d Add missing decl for phaser 2018-02-04 00:26:01 -06:00
Peter Evans
8009a33bd4 Use int return for error code 2018-02-04 00:06:22 -06:00
Peter Evans
dd2b956b49 Add ERR_INVALID error code 2018-02-04 00:06:04 -06:00
Peter Evans
a970759bec Add missing extern for the save function 2018-02-03 21:17:54 -06:00
Peter Evans
a6c1564747 Add fwrite function, support for streams and types 2018-02-03 20:50:08 -06:00
Peter Evans
2dd21f1487 Add image type, image segment 2018-02-03 18:10:29 -06:00
Peter Evans
5fc0206ff6 Add defines for track/sector sizes 2018-02-03 00:24:22 -06:00
Peter Evans
5ac2fbdbee Add new decode functions, flesh out sector code 2018-02-03 00:23:57 -06:00
Peter Evans
fadf5a9782 Add decode...code 2018-02-01 18:41:01 -06:00
Peter Evans
f87f77b806 Add ENC_VOLUME definition 2018-01-31 15:58:57 -06:00
Peter Evans
7ffe2cb527 Add _140K_NIB_ define 2018-01-31 14:28:00 -06:00
Peter Evans
8a53e02f00 Rename to enc.c, add header file 2018-01-31 00:09:07 -06:00
Peter Evans
58e2373a4d Add locked field to apple2dd struct 2018-01-28 18:06:41 -06:00
Peter Evans
9402eccc04 Add, and use, Apple //e enhanced rom 2018-01-27 19:54:19 -06:00
Peter Evans
9c0e01ecd2 Add drive phases, switches for control and i/o 2018-01-26 19:49:19 -06:00
Peter Evans
f36bba2e83 Add extern for the prepare function 2018-01-24 20:05:19 -06:00
Peter Evans
d581194bbc Add apple text functions and refactor draw logic for text 2018-01-24 16:11:08 -06:00
Peter Evans
8bbe337643 Move open apple to index 0 2018-01-24 15:05:29 -06:00
Peter Evans
6069ab4d1b Add inverse font 2018-01-24 14:26:28 -06:00
Peter Evans
775a145480 Rework screen display logic for more efficiency 2018-01-23 14:52:16 -06:00
Peter Evans
945bf23f22 Use correct default status and memory mode 2018-01-21 21:33:12 -06:00
Peter Evans
ecd8a7974a Add "BAD" instruction to crash when we hit an invalid opcode 2018-01-21 12:48:34 -06:00
Peter Evans
0581ed6b44 Fix stack in several ways 
1. The stack should descend, not ascend;
2. The stack should be pushed byte for byte; meaning, when pushing P or
A, those should consume one byte, not two;
3. The MSB should be pushed first when doing JSR and BRK, which makes
some sense if you were reading the stack from $0100 - $01FF.
 2018-01-21 01:09:42 -06:00
Peter Evans
2f777ce881 Several core changes to status, soft switches 
Regarding soft switches, we had several we should have been listening
for on both reads and writes, but were only doing so on writes; this is
now fixed.

Regarding statuses, we were incorrectly calculating both carry and
overflow. This should now be fixed, although some quick examinations of
disassembly output suggest there is something else amiss. Debugging will
continue shortly.
 2018-01-20 21:01:26 -06:00
Peter Evans
6b160c6ca2 Show the dereferenced value for a given address 2018-01-19 12:18:24 -06:00
Peter Evans
2c319399d2 Change disassembly to add more info 2018-01-19 00:34:57 -06:00
Peter Evans
d4bf5da480 Draw text in 40 column mode 2018-01-18 16:21:25 -06:00
Peter Evans
53f40ff960 Add tests for apple2.kb.c 2018-01-17 14:58:42 -06:00
Peter Evans
bf529d6c9b Finish map, mapper handling for keyboard events 
We still need to revise the test code we currently have for handling
keyboard functions; I imagine some code will need to be removed.
 2018-01-17 01:07:31 -06:00
Peter Evans
8d4283b1dc Add first work on keyboard support 
Mainly the switch_read function, which had necessitated some work done
in the vm_screen area
 2018-01-16 23:50:02 -06:00
Peter Evans
2b688c7815 Add last key, strobe fields 2018-01-16 23:49:34 -06:00
Peter Evans
9d6869bfc4 Add missing decls for switch read/write 2018-01-16 23:49:14 -06:00
Peter Evans
9811bbe450 Add switch read/write for display buffer switches 2018-01-16 23:48:49 -06:00
Peter Evans
b1177784a0 Allow access to the last key pressed and key_pressed status 2018-01-16 23:42:10 -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
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
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
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
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
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
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
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
538b5ddaa0 Add address for reset vector, applesoft, powerup 2018-01-10 16:47:45 -06:00
Peter Evans
fcba14f91b Add set16 function 2018-01-10 16:43:14 -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
Peter Evans
0e0244162f Change objstore structure to contain all peripheral ROM 2018-01-09 15:56:21 -06:00
Peter Evans
01174b63dd The data in objstore_data was not in the correct order. 
See also the change in tools/store-data; the system rom was first, when
the disk2 rom should have been first.
 2018-01-08 16:19:41 -06:00
Peter Evans
b2add9c3de Move vm_area logic into its own file 2018-01-07 20:05:02 -06:00
Peter Evans
95e57a8e19 Add get_map_machine function. 
Mostly useless except for testing.
 2018-01-07 20:00:09 -06:00
Peter Evans
ba47de0e4b Add objstore_clear(), tests for objstore 2018-01-07 16:30:33 -06:00
Peter Evans
888eb25797 Refactor a bit for easier testing; add log_stream() 2018-01-07 15:05:20 -06:00
Peter Evans
665f7de37c Rename apple2dd_ to apple2_dd_ 
Except for the struct object (apple2dd).
 2018-01-07 13:44:07 -06:00
Peter Evans
8ad1311536 Add set_memory function 2018-01-06 21:37:15 -06:00
Peter Evans
610068cb8b Add missing decl for apple2_reset() 2018-01-05 16:20:13 -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
1de1e7788a Rename status flags to MOS_ 2018-01-05 14:18:39 -06:00
Peter Evans
171ff62551 Change create to use objstore vm_8bit data 2018-01-03 21:50:30 -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
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
fd4b135d5a Add compiled object store data 2018-01-03 20:49:52 -06:00
Peter Evans
6963883a60 Define the size of the bitmap font for apple2 2018-01-03 20:48:16 -06:00