Thomas Harte
e5440a4146
Hacks in a colour burst.
...
With a major flaw: it's implicit. I think I need a minor rethink of various components here.
2019-12-20 23:49:38 -05:00
Thomas Harte
47508d50a7
Wires through a composite video option for the ST.
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Which is great and all, except that I've not yet inserted a colour burst. So it's monochrome.
2019-12-20 20:49:14 -05:00
Thomas Harte
3d83f5ab49
Ensures a proper size handoff and implements a ripple feature I happened to find a forum post about.
2019-12-19 22:58:07 -05:00
Thomas Harte
0007dc23b3
Eliminates bit 0 of the DMA address.
2019-12-19 22:44:21 -05:00
Thomas Harte
ed7f171736
Moves address reload to end of vertical sync.
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I have no information as to when it should be, so this is as valid a guess as any other.
2019-12-19 22:20:43 -05:00
Thomas Harte
0e066f0f70
Removes 'done' TODO.
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For certain values of done.
2019-12-19 22:19:59 -05:00
Thomas Harte
d85ae21b2f
Adds an explicit declaration of chip type to all AY users.
2019-12-18 19:28:41 -05:00
Thomas Harte
c00ae7ce6a
Adds a one-cycle delay on frequency changes.
2019-12-13 19:57:54 -05:00
Thomas Harte
4bcf217324
Ensures delayed loading isn't interrupted by blank, hsync.
2019-12-12 23:20:28 -05:00
Thomas Harte
f6f2b4b90f
Removes double DE edge test.
2019-12-12 22:50:35 -05:00
Thomas Harte
95b5db4d87
Tweaks timings yet further, adds a FIFO reset.
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The accuracy of this may require further research.
2019-12-11 23:22:20 -05:00
Thomas Harte
de4403e021
Corrects blank timing.
2019-12-10 22:17:57 -05:00
Thomas Harte
0a405d1c06
Introduces a latency between DE and load.
2019-12-10 21:24:15 -05:00
Thomas Harte
768b3709b8
Corrects audio clock rate.
2019-12-10 20:25:27 -05:00
Thomas Harte
a7cfb840ef
Adds but presently disables a diagnostic for border elimination.
2019-12-08 22:34:42 -05:00
Thomas Harte
c785797da6
Adds a warning for unhandled reset.
2019-12-08 21:01:30 -05:00
Thomas Harte
0408592ada
Switches to byte buffers and seeks to reduce unnecessary video flushing.
2019-12-08 20:20:13 -05:00
Thomas Harte
0ed87c61bd
Introduces an explicit area of floating bus, starts adding bus errors.
2019-12-08 11:52:43 -05:00
Thomas Harte
08a27bdec7
NTSC frame length is correct; removes TODO.
2019-12-08 11:51:12 -05:00
Thomas Harte
894066984c
Moves beginning and end of vertical sync to what I now believe is its proper place.
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At least one demo now successfully opens the top border.
2019-11-19 20:13:47 -05:00
Thomas Harte
e787c03530
Slightly shortens NTSC frame.
...
Either: (i) 263 is incorrect; or (ii) my logic as to frame height is incorrect. Given that the horizontal side of things is really well documented, I'm currently guessing (i). Research to do.
2019-11-18 23:47:27 -05:00
Thomas Harte
c04d2f6c6e
Restricts DTack delay to RAM and Shifter accesses.
2019-11-18 22:57:13 -05:00
Thomas Harte
6990abc0d3
Tweaks selected output mode when both BPP bits are set.
2019-11-18 22:56:40 -05:00
Thomas Harte
ade8df7217
Permits a delay on DE propagation back to the CPU. Plus tests.
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Currently set at 28 cycles, but I don't know.
2019-11-18 22:12:24 -05:00
Thomas Harte
82c984afa4
Switches the joysticks around.
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Thereby finally allowing me to control mode games.
2019-11-18 20:02:27 -05:00
Thomas Harte
1202b0a65f
Establishes a pipeline for delayed public state visibility.
2019-11-17 23:28:00 -05:00
Thomas Harte
facc0a1976
Amps up the documentation.
2019-11-17 21:28:51 -05:00
Thomas Harte
253dd84109
Corrects accidental dropping of pixel residue.
...
Specific issue: the repeated (start_column != end_column) test, which can no longer be correct if start_column has been incremented in the (x_&7) test.
The visible effect was to omit pixels from the output wave, which also affected observed sync timing.
2019-11-17 18:34:13 -05:00
Thomas Harte
2c4f372872
Adds support for the .ST file format.
2019-11-12 23:23:14 -05:00
Thomas Harte
f4cfca0451
Merge branch 'master' of github.com:TomHarte/CLK
2019-11-12 19:38:44 -05:00
Thomas Harte
eb287605f7
Switches to a default of TOS 1.04.
2019-11-12 19:38:30 -05:00
Thomas Harte
6a82c87320
Withdraws border optimisation temporarily; I think I may be onto an output bug here.
2019-11-12 19:33:13 -05:00
Thomas Harte
f0478225f0
Adjusts logic to reduce number of output spans.
2019-11-12 19:30:28 -05:00
Thomas Harte
c6f6bc68e1
Undoes non-insertion of media.
2019-11-10 21:52:06 -05:00
Thomas Harte
ab34fad8ca
Introduces a cleaner, separated shifter.
2019-11-10 21:39:40 -05:00
Thomas Harte
7ae0902103
Adds additional joystick commands to the dispatcher.
2019-11-09 20:10:54 -05:00
Thomas Harte
8e9428623e
Adds joystick events to the Atari ST.
2019-11-09 18:39:22 -05:00
Thomas Harte
2c25135d8a
Fixes const correctness for joystick machines; the ST is now one such.
2019-11-09 18:19:05 -05:00
Thomas Harte
860837d894
Corrects: KeyPad -> Keypad. Also fleshes out Atari ST keyboard mapping.
2019-11-09 18:02:14 -05:00
Thomas Harte
0204003680
Resolves GCC warnings.
2019-11-09 16:12:37 -05:00
Thomas Harte
77ef7dc8fc
Shuffles ST and 2600 into a common parent.
2019-11-09 15:31:41 -05:00
Thomas Harte
e3abbc9966
Renames what didn't end up being a whole SerialPort.
2019-11-09 15:21:51 -05:00
Thomas Harte
70c6010fe0
Expands visible area and adds a few more safety barriers.
2019-11-09 15:00:42 -05:00
Thomas Harte
45375fb5d0
Makes endian aware.
2019-11-09 09:48:59 -05:00
Thomas Harte
d2324e413d
Clarifies ownership of bpp-has-changed test.
2019-11-09 00:10:59 -05:00
Thomas Harte
e0c15f43bb
Avoids massive over-flushing of pixel buffers.
2019-11-09 00:05:02 -05:00
Thomas Harte
8b0d550b81
Attempts to move vertical sync out to cycle 30.
2019-11-08 22:18:47 -05:00
Thomas Harte
d1259f829e
Moves vertical state decisions back to cycle 502.
2019-11-08 21:42:05 -05:00
Thomas Harte
7caef46c05
Switches back to hsync for interrupts; corrects current address reads.
2019-11-08 21:25:28 -05:00
Thomas Harte
6902251d8b
Fixed: returns video address in bytes, not words.
2019-11-08 20:47:08 -05:00
