222 Commits

Author	SHA1	Message	Date
Thomas Harte	2562306802	Merge branch 'master' into Z80	2017-05-16 21:05:00 -04:00
Thomas Harte	2ee8a7056e	Corrected TIA no longer to assume phase is an automatic quarter askew.	2017-05-16 20:43:28 -04:00
Thomas Harte	eb8a2de5d6	Settled definitively on flush as more communicative than synchronise (and slightly more locale neutral); culled some more duplication from the Z80.	2017-05-15 07:38:59 -04:00
Thomas Harte	0808e9b6fb	Pulled the 6502 into a CPU namespace, making it an instance of something that has micro-opcodes and schedules them, and factoring out the formulation of a register pair.	2017-05-14 22:08:15 -04:00
Thomas Harte	ed6b135015	Made final switch to permit high-sampling rate Atari audio.	2017-04-15 21:18:00 -04:00
Thomas Harte	f95015c7f6	Pulled out the divisor for audio.	2017-04-03 21:16:39 -04:00
Thomas Harte	814c0ada13	Fixed action counts for border motion.	2017-03-26 18:33:05 -04:00
Thomas Harte	dfc468f220	Locked down all initial state.	2017-03-26 15:47:04 -04:00
Thomas Harte	3229502fa1	Standardised curly bracket placement across the Atari.	2017-03-23 21:59:16 -04:00
Thomas Harte	a26b87f348	Fixed: mistake was failure to count ready cycles.	2017-03-20 20:44:03 -04:00
Thomas Harte	4c3cc42c91	This gives a very noisy version of the real audio.	2017-03-20 20:38:29 -04:00
Thomas Harte	f3f4e1a541	Made a first, hacky, attempt at audio.	2017-03-20 19:35:51 -04:00
Thomas Harte	4722f6b5c4	Fixed sprite disappearance: test should be applied predecrement, not post — it relates to the address being used this access, not the next one.	2017-03-19 18:58:35 -04:00
Thomas Harte	7d8d1c7828	Fixed 'random' number generator.	2017-03-19 18:54:35 -04:00
Thomas Harte	4bb70e7d31	Resetting the mask upon low byte write appears to resolve some issues.	2017-03-19 18:49:37 -04:00
Thomas Harte	321030bb44	Added a slightly faulty but seemingly 'close' version of masking.	2017-03-19 18:28:06 -04:00
Thomas Harte	6c161b1150	This gives something that might be the correct background.	2017-03-19 17:49:48 -04:00
Thomas Harte	d5c37c8619	Shushed a little, so as to be able to see a reasonable amount of output during my lifetime.	2017-03-19 17:38:54 -04:00
Thomas Harte	7c66c36d3f	Attempted at least to manage appropriate data storage.	2017-03-19 17:31:08 -04:00
Thomas Harte	031a68000a	Added a class to contain the Pitfall 2 pager and a skeleton of initial work.	2017-03-18 22:08:47 -04:00
Thomas Harte	c3d82f88a5	Tidied up and commented on the Activision stack implementation.	2017-03-18 21:01:58 -04:00
Thomas Harte	c033bad0b9	Here's MNetwork!	2017-03-18 20:51:49 -04:00
Thomas Harte	c31d85f820	Re-emplaced the MegaBoy. Also cut detritus from the main Atari header.	2017-03-18 19:02:34 -04:00
Thomas Harte	217fbf257e	CBS RAM Plus returns.	2017-03-18 18:56:20 -04:00
Thomas Harte	0b611a14b9	Tigervision paging returns.	2017-03-18 18:50:13 -04:00
Thomas Harte	df6861c9dc	Parker Bros paging is back.	2017-03-18 18:21:01 -04:00
Thomas Harte	a4cd12394e	Reinstated the Activision stack pager.	2017-03-18 18:03:48 -04:00
Thomas Harte	e0bca1e37b	Reinstated the 16 and 32 kb Atari pagers, and ensured the 6532 always starts in a valid state.	2017-03-18 17:34:34 -04:00
Thomas Harte	55ce851bb2	Fixed types of the 8k cartridges, ensured the 6502 starts without an IRQ request history.	2017-03-18 17:04:01 -04:00
Thomas Harte	e8d34f2eb4	Having farmed out the bus, the Atari itself no longer is/owns a 6502.	2017-03-18 16:34:41 -04:00
Thomas Harte	bb3daaa99b	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.	2017-03-18 15:04:01 -04:00
Thomas Harte	36b58d03b7	Formalised read bus value guarantee from the 6502, fixed missing clock signal wiring on the Atari cartridge class, reintroduced CommaVid support.	2017-03-18 14:46:46 -04:00
Thomas Harte	7958459db9	In theory unpaged cartridges should now work. Time to debug.	2017-03-18 14:01:04 -04:00
Thomas Harte	14a76af0d3	Started trying to float out bus control to cartridges.	2017-03-17 20:28:07 -04:00
Thomas Harte	afbd9fd41b	Fixed declared line length.	2017-03-14 21:33:38 -04:00
Thomas Harte	7302703039	Implemented the Activision stack paging scheme.	2017-03-14 20:24:05 -04:00
Thomas Harte	97a8a96593	Rejigged how the memory map is handled and implemented MNetwork support.	2017-03-14 20:07:54 -04:00
Thomas Harte	3b29276228	Implemented the MegaBoy paging scheme.	2017-03-14 17:40:01 -04:00
Thomas Harte	b3632a4e86	Institutes CBS RAM Plus emulation.	2017-03-14 17:25:10 -04:00
Thomas Harte	f0d944847b	Fixed setting of the second 1kb.	2017-03-11 18:16:29 -05:00
Thomas Harte	add14fb43a	Made an attempt to implement Tigervision paging.	2017-03-11 17:44:35 -05:00
Thomas Harte	33bda2d40c	Switched to image inspection for RAM guesses rather than disassembly. Which fixes the other Parker Bros titles.	2017-03-11 13:04:23 -05:00
Thomas Harte	2b5e3a600e	Made a first attempt at implementing the Parker Bros pager within the emulation.	2017-03-11 12:43:12 -05:00
Thomas Harte	9c72ce5bd2	Ensured a settling delay is permitted before an NTSC/PAL decision is made. To avoid false switches just due to startup.	2017-03-06 19:37:35 -05:00
Thomas Harte	79784a8e57	Followed tip: missiles are locked to the position after four output pixels, not four input pixels.	2017-03-04 22:23:50 -05:00
Thomas Harte	4751615623	Fixed NTSC colour cycle count, and hence the 2600's reported line lengths and phase offset.	2017-03-04 17:31:39 -05:00
Thomas Harte	d3257c345a	Tested against public ROMs and corrected. Also moved the deferred adjustment into a more canonical place.	2017-03-04 17:00:28 -05:00
Thomas Harte	837cccdf83	Switched to deferred updates for the 6532.	2017-03-04 14:58:28 -05:00
Thomas Harte	93d1573481	Added a fix for certain homebrews.	2017-03-01 07:59:25 -05:00
Thomas Harte	893a5dd007	Added an artificial low pass filter, attempting to capture post-digital effects.	2017-02-28 21:29:55 -05:00