Commit Graph

79 Commits

Author SHA1 Message Date
Greg Hewgill
a673f8a4d4 graceful shutdown if cpu core exits 2011-08-19 21:43:12 +12:00
Greg Hewgill
9f09818aa0 abandon startup if cpu module does not start 2011-08-19 21:07:19 +12:00
Greg Hewgill
15e174c02a rename --ui switch to --bus 2011-08-19 20:30:55 +12:00
Greg Hewgill
cd692af6f3 use sockets for comms instead of stdio 2011-08-18 21:04:11 +12:00
Greg Hewgill
b8c7949d8e attempt to skip to data part of tape 2011-08-16 18:22:41 +12:00
Greg Hewgill
6951db69ad finish cassette support 2011-08-16 16:41:15 +12:00
Greg Hewgill
4963eeca9d initial cassette input 2011-08-16 15:49:48 +12:00
Greg Hewgill
c9c609be1d Separate CPU core and UI processes
This is a first step toward separating the CPU core and UI.  The UI program
starts the CPU core as a subprocess and communicates through its standard input
and output. The protocol is deliberately simple at this point. Each bus request
from the core is exactly eight bytes:

    +-------------------------+
    | cpu cycle counter high  |
    +-------------------------+
    | cpu cycle counter       |
    +-------------------------+
    | cpu cycle counter       |
    +-------------------------+
    | cpu cycle counter low   |
    +-------------------------+
    | 0x00=read / 0x01=write  |
    +-------------------------+
    | address high            |
    +-------------------------+
    | address low             |
    +-------------------------+
    | value (unused for read) |
    +-------------------------+

A single-byte response from the UI is required for a read request, and a
response must not be sent for a write request.

The above protocol is expected to change. For example:

    - the UI should tell the CPU core which address ranges are of interest
    - needs ability to send memory images to the core (both ROM and RAM)

The stream communications is currently buggy because it expects that all eight
bytes will be read when requested (that is, partial reads are not handled). In
practice, this seems to work okay for the moment.

To improve portability, it may be better to communicate over TCP sockets
instead of stdin/stdout.
2011-08-16 12:54:23 +12:00
James Tauber
7c657a8dd8 removed unused import 2011-08-15 09:41:58 -04:00
James Tauber
a2fcbd5238 adjusted speaker sample length to allow for leading edge 2011-08-15 09:37:32 -04:00
James Tauber
fbd213e240 made options...um...optional param to Memory so tests pass 2011-08-15 09:34:49 -04:00
James Tauber
51acc8e156 Merge branch 'master' into options
Conflicts:
	applepy.py
2011-08-15 09:27:53 -04:00
James Tauber
882e8478f8 Merge pull request #8 from ghewgill/arrowkeys
map left/right arrow keys to ^H/^U
2011-08-15 06:18:52 -07:00
Greg Hewgill
8827db4f6a command line options: --rom, --ram, --quiet 2011-08-15 22:47:16 +12:00
Greg Hewgill
a543112ee9 map left/right arrow keys to ^H/^U 2011-08-15 22:19:03 +12:00
Greg Hewgill
27d7a717dc add flash attribute to text mode 2011-08-15 21:58:10 +12:00
James Tauber
b9033a459a moved speaker buffer playing into the Speaker class 2011-08-15 02:30:28 -04:00
James Tauber
4dd414dea8 implemented speaker; not a bad hack :-) 2011-08-15 02:22:58 -04:00
James Tauber
be91422317 refactored memory access so cycle can be passed in 2011-08-15 00:21:20 -04:00
James Tauber
a92dcfecd3 implemented cycle calculation (except for page boundary crossing) 2011-08-14 23:50:34 -04:00
James Tauber
fcb1d585a0 added test_run to run CPU over a fragment of memory with no UI event handling (for automated testings) 2011-08-14 17:21:03 -04:00
James Tauber
bdc7b3a1e2 improved coloured for better whites 2011-08-14 03:52:56 -04:00
James Tauber
96ad7be994 fixed missing self 2011-08-13 09:49:14 -04:00
James Tauber
f3e0cef441 refactored memory so RAM just subclasses ROM, adding write_byte 2011-08-13 09:47:18 -04:00
James Tauber
6b163f1c2d whitespace nits 2011-08-13 09:43:55 -04:00
James Tauber
4c333ec125 added load_file to RAM 2011-08-13 09:41:45 -04:00
James Tauber
1be14989ca implemented HIRES colour 2011-08-13 09:11:46 -04:00
Greg Hewgill
5a8bf9a516 use pregenerated character bitmaps for text mode 2011-08-14 00:16:42 +12:00
James Tauber
e37c4dcbcd added HIRES graphics support based on code from ghewgill: 5aa8ca2caa 2011-08-13 07:52:17 -04:00
James Tauber
8f3b640393 always draw the spaces between scanlines 2011-08-13 07:24:23 -04:00
James Tauber
2f71ca9029 in mixed mode, assume monitor is colour 2011-08-13 07:22:10 -04:00
James Tauber
38736cf243 refactored update_text and update_lores into a single method 2011-08-13 07:06:11 -04:00
James Tauber
9e92bbba97 display full width of characters 2011-08-13 06:37:47 -04:00
James Tauber
588f913eb2 character heights are really 8 not 9 2011-08-13 06:36:21 -04:00
James Tauber
7cc9e8bdad implemented LORES graphics 2011-08-13 06:33:12 -04:00
James Tauber
4267732d7f make display optional (for testing) 2011-08-13 04:02:43 -04:00
James Tauber
d11aff5416 Merge branch 'master' into pygame 2011-08-13 04:00:56 -04:00
James Tauber
2e34927e7c got tests working again after memory refactor 2011-08-13 04:00:40 -04:00
James Tauber
9220ec85db ported to pygame and added bit-accurate characters 2011-08-13 03:52:07 -04:00
James Tauber
02714dff55 if writing to text screen row group 3 just skip instead of throwing exception 2011-08-07 07:03:50 -04:00
James Tauber
6525a27511 don't treat indices as signed in indexed addressing modes (ht: ghewgill) 2011-08-07 06:42:47 -04:00
James Tauber
4177ae0b25 consistent whitespace 2011-08-07 06:29:15 -04:00
James Tauber
772cdad470 Merge pull request #4 from ghewgill/master
add disassembler
2011-08-07 03:22:40 -07:00
James Tauber
c42c5044fc split memory handling into separate classes for RAM, ROM and Soft Switches 2011-08-07 06:19:49 -04:00
Greg Hewgill
267d0c8e06 add disassembler, enable for dump mode 2011-08-07 21:52:26 +12:00
Greg Hewgill
56e82f7cb6 don't allow writes to ROM area (this caused the ][+ ROM to hang on boot) 2011-08-07 21:31:01 +12:00
Greg Hewgill
c9dcee2f08 fix typos for zero_page_y_mode in instruction dispatch table 2011-08-07 20:30:44 +12:00
Greg Hewgill
1925846c3c fix dump() function so it works (when uncommented) 2011-08-07 19:32:39 +12:00
Greg Hewgill
dde4a83f85 fix typo in instruction table 2011-08-07 19:10:30 +12:00
Greg Hewgill
e961d7e00d simplify calculating signed values in adc and sbc 2011-08-07 18:33:42 +12:00