Thomas Harte
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4722f6b5c4
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Fixed sprite disappearance: test should be applied predecrement, not post — it relates to the address being used this access, not the next one.
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2017-03-19 18:58:35 -04:00 |
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Thomas Harte
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7d8d1c7828
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Fixed 'random' number generator.
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2017-03-19 18:54:35 -04:00 |
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Thomas Harte
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4bb70e7d31
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Resetting the mask upon low byte write appears to resolve some issues.
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2017-03-19 18:49:37 -04:00 |
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Thomas Harte
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321030bb44
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Added a slightly faulty but seemingly 'close' version of masking.
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2017-03-19 18:28:06 -04:00 |
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Thomas Harte
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6c161b1150
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This gives something that might be the correct background.
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2017-03-19 17:49:48 -04:00 |
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Thomas Harte
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d5c37c8619
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Shushed a little, so as to be able to see a reasonable amount of output during my lifetime.
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2017-03-19 17:38:54 -04:00 |
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Thomas Harte
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7c66c36d3f
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Attempted at least to manage appropriate data storage.
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2017-03-19 17:31:08 -04:00 |
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Thomas Harte
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031a68000a
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Added a class to contain the Pitfall 2 pager and a skeleton of initial work.
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2017-03-18 22:08:47 -04:00 |
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Thomas Harte
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c3d82f88a5
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Tidied up and commented on the Activision stack implementation.
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2017-03-18 21:01:58 -04:00 |
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Thomas Harte
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c033bad0b9
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Here's MNetwork!
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2017-03-18 20:51:49 -04:00 |
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Thomas Harte
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c31d85f820
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Re-emplaced the MegaBoy. Also cut detritus from the main Atari header.
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2017-03-18 19:02:34 -04:00 |
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Thomas Harte
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217fbf257e
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CBS RAM Plus returns.
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2017-03-18 18:56:20 -04:00 |
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Thomas Harte
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0b611a14b9
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Tigervision paging returns.
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2017-03-18 18:50:13 -04:00 |
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Thomas Harte
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df6861c9dc
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Parker Bros paging is back.
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2017-03-18 18:21:01 -04:00 |
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Thomas Harte
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a4cd12394e
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Reinstated the Activision stack pager.
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2017-03-18 18:03:48 -04:00 |
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Thomas Harte
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e0bca1e37b
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Reinstated the 16 and 32 kb Atari pagers, and ensured the 6532 always starts in a valid state.
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2017-03-18 17:34:34 -04:00 |
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Thomas Harte
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55ce851bb2
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Fixed types of the 8k cartridges, ensured the 6502 starts without an IRQ request history.
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2017-03-18 17:04:01 -04:00 |
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Thomas Harte
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e8d34f2eb4
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Having farmed out the bus, the Atari itself no longer is/owns a 6502.
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2017-03-18 16:34:41 -04:00 |
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Thomas Harte
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bb3daaa99b
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Sought to reintroduce the Atari 8k paging scheme, at the same time deciding to do away with the copy and paste of holding on to ROM data.
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2017-03-18 15:04:01 -04:00 |
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Thomas Harte
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36b58d03b7
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Formalised read bus value guarantee from the 6502, fixed missing clock signal wiring on the Atari cartridge class, reintroduced CommaVid support.
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2017-03-18 14:46:46 -04:00 |
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Thomas Harte
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7958459db9
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In theory unpaged cartridges should now work. Time to debug.
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2017-03-18 14:01:04 -04:00 |
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Thomas Harte
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14a76af0d3
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Started trying to float out bus control to cartridges.
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2017-03-17 20:28:07 -04:00 |
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Thomas Harte
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afbd9fd41b
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Fixed declared line length.
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2017-03-14 21:33:38 -04:00 |
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Thomas Harte
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7302703039
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Implemented the Activision stack paging scheme.
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2017-03-14 20:24:05 -04:00 |
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Thomas Harte
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97a8a96593
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Rejigged how the memory map is handled and implemented MNetwork support.
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2017-03-14 20:07:54 -04:00 |
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Thomas Harte
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3b29276228
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Implemented the MegaBoy paging scheme.
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2017-03-14 17:40:01 -04:00 |
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Thomas Harte
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b3632a4e86
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Institutes CBS RAM Plus emulation.
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2017-03-14 17:25:10 -04:00 |
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Thomas Harte
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f0d944847b
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Fixed setting of the second 1kb.
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2017-03-11 18:16:29 -05:00 |
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Thomas Harte
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add14fb43a
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Made an attempt to implement Tigervision paging.
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2017-03-11 17:44:35 -05:00 |
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Thomas Harte
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33bda2d40c
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Switched to image inspection for RAM guesses rather than disassembly. Which fixes the other Parker Bros titles.
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2017-03-11 13:04:23 -05:00 |
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Thomas Harte
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2b5e3a600e
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Made a first attempt at implementing the Parker Bros pager within the emulation.
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2017-03-11 12:43:12 -05:00 |
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Thomas Harte
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9c72ce5bd2
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Ensured a settling delay is permitted before an NTSC/PAL decision is made. To avoid false switches just due to startup.
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2017-03-06 19:37:35 -05:00 |
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Thomas Harte
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79784a8e57
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Followed tip: missiles are locked to the position after four output pixels, not four input pixels.
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2017-03-04 22:23:50 -05:00 |
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Thomas Harte
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4751615623
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Fixed NTSC colour cycle count, and hence the 2600's reported line lengths and phase offset.
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2017-03-04 17:31:39 -05:00 |
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Thomas Harte
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d3257c345a
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Tested against public ROMs and corrected. Also moved the deferred adjustment into a more canonical place.
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2017-03-04 17:00:28 -05:00 |
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Thomas Harte
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837cccdf83
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Switched to deferred updates for the 6532.
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2017-03-04 14:58:28 -05:00 |
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Thomas Harte
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93d1573481
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Added a fix for certain homebrews.
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2017-03-01 07:59:25 -05:00 |
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Thomas Harte
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893a5dd007
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Added an artificial low pass filter, attempting to capture post-digital effects.
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2017-02-28 21:29:55 -05:00 |
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Thomas Harte
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06dd98b23c
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Pulled the reset time for horizontal blank extend up to position 224.
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2017-02-28 20:28:54 -05:00 |
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Thomas Harte
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184c8ae707
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Extended to emulate the CommaVid.
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2017-02-27 20:50:59 -05:00 |
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Thomas Harte
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9d7985c1e1
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Added Super Chip emulation.
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2017-02-26 17:47:29 -05:00 |
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Thomas Harte
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e6a84fd26b
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Attempted a hardware-correct implementation of missile-to-player latching. This completes the last of the **knowing** inaccuracies. The rest are as-of-yet unwitting.
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2017-02-26 15:12:31 -05:00 |
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Thomas Harte
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440467ea3e
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Started communicating which copy is being requested.
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2017-02-26 13:39:25 -05:00 |
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Thomas Harte
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98376de9ad
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Started returning 'no effect' for pot ports, rather than doing nothing. Still very much TODO though.
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2017-02-25 22:58:58 -05:00 |
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Thomas Harte
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e61e355251
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Moved to the maximum possibly required queue length of 4. Though the emulated 2600 should never need more than 2 slots as per the current calling pattern, it's not a contractual guarantee.
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2017-02-25 17:25:10 -05:00 |
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Thomas Harte
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c898c8a99e
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Ensured the missiles and ball don't attempt to enqueue. Because I don't think they're supposed to.
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2017-02-25 17:13:22 -05:00 |
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Thomas Harte
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8c9062857c
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Added a single-slot queue for player objects to defer drawing, thereby deferring pixel lookup. Which I think is correct. Though more slots might be needed.
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2017-02-25 17:10:24 -05:00 |
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Thomas Harte
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77ed4ddc05
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Slightly simplified ready line release logic.
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2017-02-23 21:08:32 -05:00 |
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Thomas Harte
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82f392fada
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This should be the other way around. I want whichever is later.
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2017-02-22 21:54:49 -05:00 |
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Thomas Harte
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8291a63d5f
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Fixed loss of audio when switching to PAL.
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2017-02-22 21:15:37 -05:00 |
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