295 Commits

Author	SHA1	Message	Date
Thomas Harte	e99055bedb	Attempted switching back to a square wave for the composite video and otherwise implementing what's necessary to get to that flashing cursor — the 6560 returns its scan line and the timing bits of the 6522 are appearing.	2016-06-08 22:15:24 -04:00
Thomas Harte	581eace478	Increased logging slightly, ensured all of colour RAM can be read, slightly improved the 2600 pixel decoder.	2016-06-07 22:01:14 -04:00
Thomas Harte	26ab96868a	Decided to turn the 6522 into a template, since it's a per-cycle thing with variable behaviour. Added appropriate memory map callouts to hit the two in the Vic. Though they don't yet do anything.	2016-06-07 19:15:18 -04:00
Thomas Harte	c7c55528e2	Realised that registers appear also to be readable.	2016-06-06 20:29:39 -04:00
Thomas Harte	64539a2b24	Advanced to having some characters displayed, even though they're obviously very much incorrect and the display is still rolling.	2016-06-06 07:35:35 -04:00
Thomas Harte	9e9e50edb1	Added guess on how colour memory and the 12-bit bus possibly works.	2016-06-05 16:28:06 -04:00
Thomas Harte	2ab21e7a3c	Switched to a real (unexpanded) memory map, meaning that nonsense is no longer being supplied to the VIC.	2016-06-05 16:00:35 -04:00
Thomas Harte	9566c87532	Added enough to the machine that the 6560 can now produce output if it wishes.	2016-06-05 12:11:12 -04:00
Thomas Harte	b56482607e	Added just enough that the 6502 should now be operating correctly.	2016-06-05 11:44:29 -04:00
Thomas Harte	0b221e773f	Fixed ROM naming and sizes, ensured machines without sound outputs don't end up with an audio queue.	2016-06-05 11:20:05 -04:00
Thomas Harte	f922d38ed2	The Vic now captures the ROMs sent to it and has just enough infrastructure to get to a black screen. Progress!	2016-06-05 10:51:07 -04:00
Thomas Harte	12243c40ad	Kicking the ball a little further down the road, ROMs and PRGs now reach the actual emulated machine.	2016-06-05 09:06:59 -04:00
Thomas Harte	b10a06e700	A CRT is still absent but this moves the ball back into the C++ side's court.	2016-06-04 22:00:50 -04:00
Thomas Harte	404873fe58	Started sketching out infrastructure for Vic-20 support.	2016-06-04 21:43:50 -04:00
Thomas Harte	604862b20b	Fixed playfield/missile and playfield/ball collisions.	2016-06-02 22:36:52 -04:00
Thomas Harte	e3b95b8d2b	Back to asynchronous updates and drawing, to try to improve guarantees on audio latency; experimenting with whether other parts of the approach are fundamentally flawed; added a broad-phase for scheduled updates on the 2600.	2016-06-02 21:22:55 -04:00
Thomas Harte	11073daee1	Issues appear to be around timing generally. Working on it.	2016-06-02 20:15:48 -04:00
Thomas Harte	7aac306a12	Quick fix to the polynomials.	2016-06-02 19:56:02 -04:00
Thomas Harte	253e5a4203	With no regard to performance whatsoever, endeavoured to bring sound to the 2600. It's very scratchy, so something is wrong.	2016-06-02 19:50:16 -04:00
Thomas Harte	1e0fcbbee8	Made a very basic stab at a couple of the tone generators, added straight-through path for the speaker when input rate exactly equals output rate.	2016-06-01 19:53:16 -04:00
Thomas Harte	40c4544fb7	Got the basic sound pipeline pumping, just enough for static-level audio seemingly to work. Berzerk VE says "intruder alert, intruder alert", anyway.	2016-06-01 19:27:04 -04:00
Thomas Harte	8dc66167be	Made an attempt to consolidate the Objective-C++ side of things based on the incoming CRTMachine::Machine.	2016-05-31 22:16:20 -04:00
Thomas Harte	5c4f35e13f	Finally started on generalising the C++ stuff so as to be able to be able to get a working audio binding on the OS-specific side without further repetition by factoring an appropriate protocol out from the Electron and sketching out the correct speaker class for the Atari. Added a method to ask it what a good output frequency would be.	2016-05-31 21:23:44 -04:00
Thomas Harte	3fc80ea01f	Rethought, hopefully perfecting, sprite timing.	2016-05-30 19:56:36 -04:00
Thomas Harte	8b342f77a9	Made an attempt further to rationalise timing.	2016-05-27 21:51:27 -04:00
Thomas Harte	91d3453cc1	Switched to looking backwards rather than forwards.	2016-05-27 14:33:08 -04:00
Thomas Harte	106ddae907	Sprites are still a pixel off but better; made some attempt to move things outside of the loop.	2016-05-25 21:43:19 -04:00
Thomas Harte	40c2c0bd2d	Minor simplifications and improvements. Still trying to figure out what's causing the non-linear edge addressing.	2016-05-25 21:12:25 -04:00
Thomas Harte	b01b474e36	I'm back to thinking that resets are deferred but pixel counts are live.	2016-05-25 07:32:25 -04:00
Thomas Harte	758806f924	Introduced a separate queue for pixels, which may or may not be correct.	2016-05-24 21:39:57 -04:00
Thomas Harte	0b081831a9	Set up a pipeline for all pixels that attempts to allow for appropriate delays.	2016-05-24 07:58:26 -04:00
Thomas Harte	5c1e594937	Realised there's a clocking delay on starting horizontal move. Which fixes Coke Zero.	2016-05-22 21:45:40 -04:00
Thomas Harte	c3e719c4ab	Added missile-to-player offsetting. Completing the list of graphics-related TODOs.	2016-05-22 17:01:56 -04:00
Thomas Harte	4c6d4d899d	Ensured that resetting the horizontal timer affects phase.	2016-05-22 16:29:53 -04:00
Thomas Harte	df93d7849d	Re-enabled the ball.	2016-05-22 14:38:14 -04:00
Thomas Harte	0242924fb4	Various bits of caveman debugging appearing and disappearing, switched to latching ball behaviour.	2016-05-22 14:26:02 -04:00
Thomas Harte	5e220562e4	Actually, the four-clock delay, with palette taking effect immediately, appears to be correct. So back to the drawing board on that.	2016-05-21 21:44:54 -04:00
Thomas Harte	4eded9b9d0	Re-enabled collisions.	2016-05-21 13:05:36 -04:00
Thomas Harte	b1c84f5402	Counters run every scan line regardless of blank and sync. Also played further with timing.	2016-05-21 12:54:39 -04:00
Thomas Harte	470c90428a	Switched to two-register implementation of VDELP, etc.	2016-05-21 10:26:27 -04:00
Thomas Harte	36d19cb6cf	Made an attempt at properly pumping timers during hmove.	2016-05-21 10:18:15 -04:00
Thomas Harte	a952813036	Fixed missile sizes, played about with ball placement.	2016-05-19 18:30:17 -04:00
Thomas Harte	cf5b8ab92e	This is now approximately back to where it was on Cosmic Ark.	2016-05-19 08:30:10 -04:00
Thomas Harte	40600b4bcb	Made sprite placement consistent at least. Not necessarily yet correct.	2016-05-18 22:07:24 -04:00
Thomas Harte	e61392d3fb	Fixed incorrect duplication.	2016-05-18 21:50:28 -04:00
Thomas Harte	8c7ce1ec3f	Attempted to fix sprite sizing and, again, missile repetition.	2016-05-18 21:41:25 -04:00
Thomas Harte	d013d46337	Fixed object motion decoding and checking of the repeat mask for missile graphics.	2016-05-18 21:36:28 -04:00
Thomas Harte	83ed6a82cf	Fixed: asserting vertical blank doesn't affect underlying timing.	2016-05-18 18:49:40 -04:00
Thomas Harte	877c55b5c5	Threw in missiles. To 'complete' graphics output. Or, rather, to move me on to debugging.	2016-05-18 07:54:44 -04:00
Thomas Harte	354143a78c	Reintroduced an attempt to plot sprites.	2016-05-18 07:51:25 -04:00