25 Commits

Author	SHA1	Message	Date
Thomas Harte	44e5a03cf2	Removed just-don't-power-the-tape approach to pausing and playing, in favour of being fully communicative.	2017-07-19 19:21:27 -04:00
Thomas Harte	3e5c209039	Added basic Typer support for the ZX80 and '81.	2017-07-09 22:00:34 -04:00
Thomas Harte	d6b87053bf	Introduced an explicit record of whether a video byte is latched. It's definitely incorrect to treat the latching of 0 as equivalent to no latching, as the byte that will eventually become video is not strongly implied.	2017-07-08 20:40:19 -04:00
Thomas Harte	54efcb7e2f	Made a game attempt at automatic motor control and ensured setting is initialised correctly from the user defaults.	2017-07-08 19:31:20 -04:00
Thomas Harte	e2575d6de4	Routed tape motor selections through to the C++ side of the world, and ensured that manual tape playback works properly.	2017-07-08 19:21:12 -04:00
Thomas Harte	a3684545b5	Added a block on the tape motor for a short period after each time the ROM routine is intercepted for a substituted byte read. To reduce the collision between fast tape and real tape loading.	2017-07-06 22:33:54 -04:00
Thomas Harte	644ef13acd	Connected up the fast-tape GUI option for the ZX80 and '81.	2017-06-22 20:20:31 -04:00
Thomas Harte	e1355d4b62	Restored proper video output.	2017-06-21 21:18:09 -04:00
Thomas Harte	0e0ce379b4	Renamed MachineCycle to PartialMachineCycle given that it mostly no longer intends to describe an entire machine cycle.	2017-06-21 20:38:08 -04:00
Thomas Harte	76a64d13a0	Made a first attempt at ZX81 emulation.	2017-06-13 21:25:55 -04:00
Thomas Harte	8b09b4180b	This now at least remembers whether it is meant to be a ZX81 and has storage for a horizontal counter.	2017-06-12 21:33:16 -04:00
Thomas Harte	06fe07932a	While tidying up, killed an unused instance variable.	2017-06-11 21:21:26 -04:00
Thomas Harte	6b602c74b7	Made an attempt to support memory maps other than the unexpanded default of 1kb.	2017-06-11 19:29:02 -04:00
Thomas Harte	e40d553045	Bumped the tape parser up into the machine to ensure a maintained state. Temporarily disabled normally-timed tape playback.	2017-06-11 18:31:43 -04:00
Thomas Harte	84d2feb2e6	Cleaned up and implemented fast-tape hack. I've decided it'd be better to test some other software, potentially to give multiple issues to think about, rather than sitting around with just the one.	2017-06-11 16:42:49 -04:00
Thomas Harte	8c66e1d99d	Factored out ZX80/81 video and rejigged to ensure it will keep ticking over irrespective of whether the machine is supplying data.	2017-06-06 17:53:23 -04:00
Thomas Harte	ca9e8aecd6	Made a seemingly unsuccessful attempt to add tape input.	2017-06-06 10:13:32 -04:00
Thomas Harte	cc4cb45e9d	Implemented keyboard input and ensured that the signal generated is marked as composite, putting the colour-suppression ball into the CRT's court.	2017-06-06 09:25:18 -04:00
Thomas Harte	6f7037b2b1	Made an initial stab at outputting half the correct pixels.	2017-06-06 08:55:07 -04:00
Thomas Harte	2fbc7a2869	Made a very basic attempt at getting something that at least demarcates proper graphics output.	2017-06-05 23:32:49 -04:00
Thomas Harte	4983718df7	Got to outputting something to the CRT. Should be just proper syncs and a paper background. It's not synchronising properly, so something is amiss in my timing.	2017-06-05 10:47:42 -04:00
Thomas Harte	7e3a46c33e	[Re]discovered that sync may also be a product of the interrupt cycle. So started looking into that.	2017-06-04 21:54:55 -04:00
Thomas Harte	096551ab3e	Made a first attempt to hash out the ZX80's bus. Video output isn't yet going though. Can't seem to find clarity on whether horizontal sync is really programmatic. Let's see.	2017-06-04 18:32:23 -04:00
Thomas Harte	c485c460f7	Imported the ZX80 and 81 system ROMs (though not publicly), added enough code to post their contents into C++ world.	2017-06-04 18:08:35 -04:00
Thomas Harte	d2637123c4	Added necessary support to get as far as an empty window when attempting to load a piece of ZX80 software.	2017-06-04 17:55:19 -04:00