96 Commits

Author	SHA1	Message	Date
Thomas Harte	e9f1a6a79d	This appears to be it. The secret? Don't worry about the stop bits. They're just processing time. Latch onto the next start.	2016-11-03 07:34:48 -04:00
Thomas Harte	827a919368	This is an initial attempt at reading actual tape data. It loses sync though.	2016-11-02 22:30:53 -04:00
Thomas Harte	419629ee6e	Completed proof of theory for fast loading. It's just an around-the-back direct-to-file hack for now though.	2016-11-02 21:09:49 -04:00
Thomas Harte	bb58caff52	Merge branch 'master' into FastOricTape	2016-10-31 22:11:03 -04:00
Thomas Harte	21604376e6	Reintroduced clocking of the AY and boxed in the range of the master divider a little further.	2016-10-30 22:51:08 -04:00
Thomas Harte	33512988fb	Added a basic cycle skipper plus some notes.	2016-10-30 22:39:47 -04:00
Thomas Harte	b04ba41951	Moved code out of header.	2016-10-30 20:16:58 -04:00
Thomas Harte	3b52ab0d37	Cut some dead state.	2016-10-30 20:16:52 -04:00
Thomas Harte	58f888c6ad	Limited CRT calls.	2016-10-30 16:21:20 -04:00
Thomas Harte	1ff9b474bf	Made an attempt to make execution flow through this loop more straightforward for a branch predictor.	2016-10-30 15:30:39 -04:00
Thomas Harte	4fab794747	Added a direct-to-two-cycles emulation path for 6522 owners.	2016-10-27 21:13:25 -04:00
Thomas Harte	2eda0b3c86	Attempted to simplify the logic behind the most common 6522 usage.	2016-10-27 21:06:31 -04:00
Thomas Harte	30d4a7c662	Fixed: blinking means ink vanishing and appearing. Nothing else.	2016-10-24 21:58:15 -04:00
Thomas Harte	09687a2e2f	Removed errant newline.	2016-10-20 21:30:12 -04:00
Thomas Harte	44910d90ba	Adjusted aberrations in semicolons.	2016-10-20 21:20:13 -04:00
Thomas Harte	d335991e60	Shifted code out of the header.	2016-10-20 20:53:17 -04:00
Thomas Harte	9c956f83b8	Made it slightly more clear that the correct test is conformed to.	2016-10-20 19:23:36 -04:00
Thomas Harte	21cfb39ed9	Added 60Hz output support.	2016-10-20 07:34:23 -04:00
Thomas Harte	5c69728625	Introduced a memory fuzzer, and ensured the Oric uses it.	2016-10-19 21:31:50 -04:00
Thomas Harte	734b575d30	Ensured no attempt to write to pixel storage if none was available.	2016-10-19 21:17:27 -04:00
Thomas Harte	ca28e3c64e	Ensured the AY is pumped linearly, not exponentially.	2016-10-18 22:21:06 -04:00
Thomas Harte	9669a5ec9b	Switched to a more authentic interfacing to the AY.	2016-10-18 19:32:15 -04:00
Thomas Harte	988bbb5ab1	Ensured AY registers aren't rewritten just because of a synchronise event. A stall prior to figuring out proper bus logic, clearly.	2016-10-17 08:05:57 -04:00
Thomas Harte	1a57e89ff0	Altered phase so that it now merely accounts for accumulated error across a frame. Can probably do better.	2016-10-17 08:04:15 -04:00
Thomas Harte	61ad0f8bdc	Fixed inverse characters, added an extra per-frame phase change, based on empirical observation, ensured header guard won't become ambiguous.	2016-10-16 22:14:01 -04:00
Thomas Harte	a67afb7efa	Switched to a tight crop on the pixel part of the display.	2016-10-15 21:43:46 -04:00
Thomas Harte	a608bbebfb	Performed enough wiring to put the onus back onto OricTAP to do appropriate things.	2016-10-15 21:32:59 -04:00
Thomas Harte	6d7c3f6ac2	Factored out the now-sampling binary-level tape player from the Vic and connected it up to the Oric.	2016-10-15 21:21:18 -04:00
Thomas Harte	9730e8247f	Ensured propagation of synchronise messages, added enough to do plain tone. Probably. So: noise and envelopes missing. And it's all far too quiet.	2016-10-15 21:04:21 -04:00
Thomas Harte	51bdac27ae	Made some AY advances; it's now being polled for samples and collecting more information on what it needs to output.	2016-10-15 17:45:39 -04:00
Thomas Harte	da9c9ad51a	Added in the missing keys; added variable phase to the video.	2016-10-14 22:39:27 -04:00
Thomas Harte	288d10c253	Got some keyboard reaction.	2016-10-14 21:44:15 -04:00
Thomas Harte	3dbb602419	This seems to be a bit more likely.	2016-10-14 21:36:59 -04:00
Thomas Harte	138eabcff4	Continued in my effort to wire up a keyboard. Will need further to continue.	2016-10-14 21:35:15 -04:00
Thomas Harte	d8e4c488c2	Started iterating towards having an AY and a fully-working keyboard.	2016-10-14 21:18:03 -04:00
Thomas Harte	8867ad647c	Made an attempt at implementing the loopbacks necessary for diagnostics.	2016-10-13 21:47:12 -04:00
Thomas Harte	41e7eff6c8	Added a VIA. Now it's time to find out how poor my 6522 emulation is.	2016-10-13 20:50:55 -04:00
Thomas Harte	c9962f6502	Made an almost complete implementation of video. Just one row of the diagnostics cartridge seems to be off, showing thw wrong character set.	2016-10-13 19:34:29 -04:00
Thomas Harte	69920a4979	Made some basic first attempt at parsing video attributes; ensured lowest byte of ROM is readable.	2016-10-13 07:59:11 -04:00
Thomas Harte	ae48ad1bb4	Meaningful text! Albeit with the initial 'O' of 'Oric' missing. I guess control codes and NMIs next?	2016-10-12 22:03:54 -04:00
Thomas Harte	120b2d9e33	Switched to using a diagnostic ROM for now, as it'll definitely boot without initially requiring either a 6522 or AY. Have some forms appearing which imply I'm not doing badly, at least up to not knowing where I'm supposed to get character pixels from.	2016-10-12 21:52:47 -04:00
Thomas Harte	1f857c619b	Fixed timing issues. Static box of frame achieved!	2016-10-12 21:42:36 -04:00
Thomas Harte	304f0999cd	Made a faulty but hopefully creditable attempt to demarcate an Oric frame.	2016-10-12 21:29:21 -04:00
Thomas Harte	8c8a71107e	Added just enough wiring to add something that will generate the video, one day.	2016-10-12 19:20:23 -04:00
Thomas Harte	e6937d8003	Ensured that the ROM gets installed. So next for some video action?	2016-10-12 18:51:02 -04:00
Thomas Harte	4a062c616f	Added enough wiring to get Oric TAPs through to a completely unimplemented Oric emulation.	2016-10-11 22:20:13 -04:00