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Author SHA1 Message Date
Peter Evans
8a53e02f00 Rename to enc.c, add header file 2018-01-31 00:09:07 -06:00
Peter Evans
b09ca2dae5 Reword comment 2018-01-30 18:55:23 -06:00
Peter Evans
5c7dbb4cfe My first crack at some code for nibblization 2018-01-30 16:30:23 -06:00
Peter Evans
e2e5f20e24 First version of transcribed disk II controller ROM 2018-01-29 01:24:40 -06:00
Peter Evans
5812fb8672 Compile with debugging symbols for now 2018-01-29 00:30:49 -06:00
Peter Evans
b2bfee7f96 The SLOTCXROM switch seems to work opposite 
Which seems weird, but I've verified this in some other places.
 2018-01-29 00:30:12 -06:00
Peter Evans
58e2373a4d Add locked field to apple2dd struct 2018-01-28 18:06:41 -06:00
Peter Evans
418688cd15 Lock disk drives during disassembly 2018-01-28 18:06:14 -06:00
Peter Evans
33b44d1a70 selected_drive will now have a default value (of drive1) 2018-01-27 21:53:12 -06:00
Peter Evans
2c3d6a4dfa Reimplement idx and idy to use 16-bit addresses 
While I have found some conflicting details on how this should be done,
it seems pretty clear to me that IDX and IDY work with 16-bit addresses,
not 8-bit. The inability to do so was preventing us from probing
peripheral ROM (e.g. at $C705, for the disk controller).
 2018-01-27 19:54:55 -06:00
Peter Evans
9402eccc04 Add, and use, Apple //e enhanced rom 2018-01-27 19:54:19 -06:00
Peter Evans
4165c1cefc Make idx, idy clearer 
I'm still not confident this is how it _should_ work, but I have found
conflicting accounts online for the behavior of these two modes. The
current code is what allows the Apple II to bootstrap as it should.
 2018-01-27 13:04:19 -06:00
Peter Evans
38d80078d9 Remove obsoleted test functions 2018-01-27 00:16:39 -06:00
Peter Evans
dde7312864 No need to deal with carry here 2018-01-27 00:15:06 -06:00
Peter Evans
9bbfb95b02 Carry is no longer factored 2018-01-26 22:04:47 -06:00
Peter Evans
d29dfd442a Account for SLOTCXROM being on by default 2018-01-26 22:03:57 -06:00
Peter Evans
76e4d3797f By default SLOTCXROM should be high 2018-01-26 22:01:46 -06:00
Peter Evans
ca5276cb6b It turns out we don't use carry for addr modes. 
This fix actually corrects a rather irritating bug where the Apple ][
logo was displaying one-off--e.g., as "pple ][D".
 2018-01-26 21:18:42 -06:00
Peter Evans
4509f61be6 dd_write no longer accepts the byte it will wryte 2018-01-26 20:00:10 -06:00
Peter Evans
9c0e01ecd2 Add drive phases, switches for control and i/o 2018-01-26 19:49:19 -06:00
Peter Evans
e901bcf54d Add docblock comments 2018-01-25 14:12:49 -06:00
Peter Evans
217b27b040 Handle inversed text 2018-01-24 20:05:47 -06:00
Peter Evans
f36bba2e83 Add extern for the prepare function 2018-01-24 20:05:19 -06:00
Peter Evans
2ae272af3a Stop flickering issue by clearing before drawing 2018-01-24 20:04:53 -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
4a4fd93d9d Inverse for last two glyphs; add inverse bitmap 2018-01-24 14:14:49 -06:00
Peter Evans
375b5a173f Add inverse font glyphs 2018-01-24 13:56:48 -06:00
Peter Evans
f073c0d007 Add new glyph grid files and rebuild bitmap 2018-01-24 13:05:35 -06:00
Peter Evans
70cfa527b4 Add new glyphs and sort glyph map 2018-01-24 13:05:16 -06:00
Peter Evans
cfee8baf25 Refresh once every thirtieth of a second 
And also refresh on keypress
 2018-01-23 23:14:26 -06:00
Peter Evans
882cf2c166 Comment out cycles 2018-01-23 21:41:43 -06:00
Peter Evans
9f518d5141 We should not resolv the address a second time 2018-01-23 21:41:30 -06:00
Peter Evans
47630fdc88 pha/php only push one byte onto the stack 2018-01-23 21:37:36 -06:00
Peter Evans
c946eb3f69 Fix incorrect stack info 
(The previous behavior of RTS/JSR was not right.)
 2018-01-23 21:35:59 -06:00
Peter Evans
2e334e2ee1 Update tests with correct expected text from disassembler 2018-01-23 21:19:26 -06:00
Peter Evans
1751a7af1f Don't try to call resolv() if resolv is NULL 2018-01-23 21:18:42 -06:00
Peter Evans
80136e9360 Most status flags are now set when the CPU is created 2018-01-23 20:41:48 -06:00
Peter Evans
0b03fd24f5 Carry must also be factored in 2018-01-23 20:26:01 -06:00
Peter Evans
5656b271ee Account for carry being set by default 2018-01-23 16:30:52 -06:00
Peter Evans
746e2246b3 Set negative and unset zero since the operand >= A 2018-01-23 16:29:53 -06:00
Peter Evans
3c7002c6c7 Carry is only unset if the operand >= A 2018-01-23 16:29:08 -06:00
Peter Evans
dc97a6996e Account for carry being set by default 2018-01-23 16:28:39 -06:00
Peter Evans
b02679f6a0 Carry must be unset 2018-01-23 16:26:05 -06:00
Peter Evans
522905b39c Carry must be unset in this test 2018-01-23 16:24:46 -06:00
Peter Evans
60ff0e5781 Carry is set by default now 2018-01-23 16:24:16 -06:00
Peter Evans
a3598ecd16 The stack pushes from the end of the page now 2018-01-23 16:21:43 -06:00
Peter Evans
8edf83f7ad Carry is set only if the result is > 0xFF 2018-01-23 16:20:33 -06:00
Peter Evans
8133781fd3 Use the address mode enum itself 2018-01-23 16:18:22 -06:00