396 Commits

Author	SHA1	Message	Date
Thomas Harte	cd97617a8a	Bumped the speaker up to the full namespace, since Tape lives there to avoid delegation complexity. Turned the CRT into something the Electron statically owns, fixing a memory leak by simplifying.	2016-01-23 17:45:06 -05:00
Thomas Harte	f4cd0aa38e	Ensured that all relevant information is given to the tape class. Made an attempt not to write to a screen output buffer if we don't have one. Added some debug printing.	2016-01-23 13:09:56 -05:00
Thomas Harte	949c33774a	Fixed failure to set a delegate, slowed tape speed if operating in RAM.	2016-01-23 11:42:14 -05:00
Thomas Harte	43a7d1b7ae	It'll be helpful to be able to isolate the tape interface when I'm faking a fast load. So factored out.	2016-01-23 00:14:44 -05:00
Thomas Harte	0efe4b312c	Disabled my various bits of rate interchange debugging; improved test for when to call update_display due to a RAM write.	2016-01-21 22:16:52 -05:00
Thomas Harte	82cb1c365c	Further simplified inner loops.	2016-01-21 21:35:04 -05:00
Thomas Harte	34640cec93	Started trying to move some logic out of the inner loop.	2016-01-21 21:28:09 -05:00
Thomas Harte	48ddd3c497	Set about documenting the CRT; while doing so decided to add an optional clock divider for input; having done so decided to try to exploit it with the Electron.	2016-01-21 21:17:47 -05:00
Thomas Harte	de7218cdf0	Added a lot of commenting to the CPU6502 definition, simplifying its construction. Added missing nullability modifier to CSElectron. Fixed bad-habit Objective-C style naming on the Electron's Interrupt enum.	2016-01-20 21:55:38 -05:00
Thomas Harte	4c16d34063	Moved set_tape so that the inline definition of get_next_tape_pulse is visible to it. Also eliminated some dead typedefs.	2016-01-20 08:27:25 -05:00
Thomas Harte	280a2292ff	Shushed.	2016-01-19 23:33:15 -05:00
Thomas Harte	9036cf3b7c	Thus did the first UEF load.	2016-01-19 23:03:27 -05:00
Thomas Harte	e65cd4cf06	Some data is marginally reaching the CPU from the tape.	2016-01-19 22:05:34 -05:00
Thomas Harte	956b90e203	Attempted further to improve latency; added view adjustment for non-4:3 output aspect ratios. The 4:3 is currently hardcoded, so further work will be required.	2016-01-18 23:55:52 -05:00
Thomas Harte	e63b6d22ae	As shown by the commented-out code, the aliasing-adaptation seems to be working. So something is wrong somewhere else.	2016-01-14 21:59:37 -05:00
Thomas Harte	383b2be4c6	Fixed one off-by-one error.	2016-01-14 21:33:27 -05:00
Thomas Harte	8bd04a6be4	Switched model for filter subclasses. Implemented test square[-ish] wave to check for obvious stream errors. None is clear.	2016-01-14 21:27:02 -05:00
Thomas Harte	38ffcaa262	Here, at last, is _some_ audio output, at least.	2016-01-14 20:33:22 -05:00
Thomas Harte	439d452e23	Resolved some errors.	2016-01-13 22:11:33 -05:00
Thomas Harte	49e89a4bcb	I'm not yet completely convinced by my approach to time basing, but it'll probably do? If so then this more or less gets me ready for a point-sampled filtering.	2016-01-13 22:02:39 -05:00
Thomas Harte	d9a7ef9e46	Edging towards audio output; the speaker is given appropriate input and output rates, and then updated with current divider and enabled/disabled status.	2016-01-13 21:03:43 -05:00
Thomas Harte	d28abdc037	Made an attempt at correct timing, adding support for additional paged ROMs, added file association for .rom.	2016-01-12 22:34:26 -05:00
Thomas Harte	84ba4e2900	Tidied a little, started working towards supporting speaker output.	2016-01-12 22:19:56 -05:00
Thomas Harte	75d6ec354b	Added some very basic filtering in RGB mode.	2016-01-12 16:27:09 -05:00
Thomas Harte	cba09b5490	Switched display update and RAM write order.	2016-01-11 22:29:16 -05:00
Thomas Harte	650077feac	Pulled a few things out as constants, zoomed in a little. Still in a 4:3 window though.	2016-01-11 22:18:34 -05:00
Thomas Harte	72019d0ea3	Made an attempt to get video output correct.	2016-01-11 22:08:30 -05:00
Thomas Harte	e93dbdb463	Implemented keyboard input.	2016-01-11 19:48:31 -05:00
Thomas Harte	ce916ebd6a	Fixed runaway frame generator.	2016-01-10 23:32:57 -05:00
Thomas Harte	ccf20299a3	Made an attempt at getting some interrupts all up inside this thing.	2016-01-10 19:06:46 -05:00
Thomas Harte	cc5ba8243e	Fixed: turned out the power-on bit was being cleared.	2016-01-10 17:17:39 -05:00
Thomas Harte	d95414b2eb	I'm not really sure what's going wrong with paging yet but this fixes the 0xc000 byte error.	2016-01-10 12:30:24 -05:00
Thomas Harte	e07981c147	Fixed screen start address.	2016-01-09 22:52:08 -05:00
Thomas Harte	1308332a71	Hard-coded to 40 columns of black and white, here's some text, at least.	2016-01-09 22:39:46 -05:00
Thomas Harte	037602765a	This now correctly (I think) decodes information posted to the CRT. But doesn't yet post it correctly. I'm very close now, I hope.	2016-01-09 22:19:00 -05:00
Thomas Harte	07a041d788	Fixed vertical retrace sync.	2016-01-09 21:54:31 -05:00
Thomas Harte	3d6f20b7b9	Output, at last! Though sync is clearly way off.	2016-01-09 21:53:33 -05:00
Thomas Harte	b4f31edea3	Made an attempt to get RGB output mode up and running, and showing at least a box where pixels would be.	2016-01-09 21:32:56 -05:00
Thomas Harte	a900bfed65	Fixed to ensure that frame rendering wraps around, and to properly connect the Electron to its view. Now I need a working pixel shader.	2016-01-09 20:34:22 -05:00
Thomas Harte	7341f5c341	This is intended to be enough to start producing something of an output. But something's obviously still broken.	2016-01-09 20:26:40 -05:00
Thomas Harte	716bb3281b	This at least now connects up a CRT, though it never talks to it.	2016-01-07 22:26:49 -05:00
Thomas Harte	47a7654c00	Added just enough that this is probably a successful boot. I guess I'm going to need to get invested in graphics next? Hmmm.	2016-01-07 21:01:13 -05:00
Thomas Harte	8c1bfa5a05	This is the bare minimum to prove that the ROM is trying properly to boot.	2016-01-07 20:36:27 -05:00
Thomas Harte	0db8938d27	Added the option for the CSCathodeRayView to show only a subsection of the full scan area. Zoomed in a little on the 2600. Put in enough piping to give the Electron sight of its ROMs at least.	2016-01-06 23:14:36 -05:00
Thomas Harte	bfd9957c81	You now get an Electron only if you ask for a new file. That'll do for now while it's the only thing that one might want to start without supplying a file. The 6502 now starts from a defined point — being reset. The Electron is starting to grow the absolute most simple buds of its memory map.	2016-01-06 21:09:49 -05:00
Thomas Harte	ab45c1d530	Started working on a shell for the Electron emulation, including factoring out the common CRT delegate -> Objective-C bridging, serial dispatch queue and frameskipping logic from the Atari 2600 shell.	2016-01-04 23:12:47 -05:00