Thomas Harte
|
966b5e6372
|
Adapted the Z80's perform_machine_cycle to return Cycles.
|
2017-07-25 22:25:44 -04:00 |
|
Thomas Harte
|
b82bef95f3
|
Decided to follow through on Cycles and HalfCycles as complete integer-alikes. Which means giving them the interesting range of operators. Also killed the implicit conversion to int as likely to lead to type confusion.
|
2017-07-24 20:10:05 -04:00 |
|
Thomas Harte
|
2ff157cf7a
|
Switched CRTMachine over to use Cycles as an explicit statement of units, and followed through on the effects of that.
|
2017-07-22 22:17:29 -04:00 |
|
Thomas Harte
|
3f609e17b3
|
Factored out the table-lookup approach to being a typer, and adjusted so as definitely to limit myself to positive offset table lookups.
|
2017-07-21 21:18:51 -04:00 |
|
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 |
|