6502/erc-c
1
0
Fork 0
mirror of https://github.com/pevans/erc-c.git synced 2024-11-24 14:32:08 +00:00
Code Issues Projects Releases Wiki Activity
579 Commits 6 Branches 0 Tags 917 KiB
26e2abe745
Commit Graph

579 Commits

This Branch
This Branch
All Branches
Author SHA1 Message Date
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
Peter Evans
7a0ea50aa3 The stack now only works with 8bit values; disable carry 2018-01-23 16:16:59 -06:00
Peter Evans
9215600148 Don't attempt to render a glyph if render is NULL 2018-01-23 16:09:27 -06:00
Peter Evans
ef13fe4ef1 Require STATUS_DEFAULT, stack pointer at ff 2018-01-23 16:07:21 -06:00
Peter Evans
766aea9c96 Change dbuf switches to work off correct addresses 2018-01-23 15:51:06 -06:00
Peter Evans
8f516db42b Remove arbitrary counter and allow escape to exit 2018-01-23 15:04:11 -06:00
Peter Evans
775a145480 Rework screen display logic for more efficiency 2018-01-23 14:52:16 -06:00
Peter Evans
b5e1e09a35 Bump up counter by a ton 2018-01-22 21:43:18 -06:00
Peter Evans
b97af6cb16 Disable active refresh 2018-01-22 21:43:01 -06:00
Peter Evans
47d7483297 Disable usleep delay for now 2018-01-22 21:42:42 -06:00
Peter Evans
e0b4fd27e8 Better logging 2018-01-22 21:42:30 -06:00
Peter Evans
56433e2ebe Show nothing if no value is associated with an instruction 2018-01-22 12:31:19 -06:00
Peter Evans
945bf23f22 Use correct default status and memory mode 2018-01-21 21:33:12 -06:00
Peter Evans
c2debec4d3 Make output more compact 2018-01-21 21:32:43 -06:00
Peter Evans
ef7977c18b Only set or unset DHIRES if IOUDIS is on 2018-01-21 21:32:22 -06:00
Peter Evans
d119854631 Carry is set by left- or right-most bits 
Don't rely on modify_status() to get it right.
 2018-01-21 16:21:15 -06:00
Peter Evans
3206332a7d Set carry if the right-most bit is 1 
Don't consider the left-most bit
 2018-01-21 16:17:31 -06:00
Peter Evans
5d8403aaa7 Only set negative if operand has it set 
That is, don't consider A & operand for negative.
 2018-01-21 16:12:03 -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
1334e34e76 Use A & oper here 2018-01-21 12:47:58 -06:00
Peter Evans
f9a95827f5 Change carry flag strategy according to docs 2018-01-21 12:47:36 -06:00
Peter Evans
5f93bdae25 Try to match technical behavior described for JSR/RTS 2018-01-21 01:17:04 -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