Thomas Harte
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484524d781
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Implements RAM paging. The 6128 is now emulated.
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2017-08-08 16:01:56 -04:00 |
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Thomas Harte
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a7103f9333
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Disks are now communicated to the 8272. Which is able to handle four of them.
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2017-08-06 13:24:14 -04:00 |
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Thomas Harte
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29288b690e
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Switched disk controllers to be instantiated explicitly in terms of cycles, created an Amstrad-specific subclass of the 8272 to record the direct programmatic availability of all disk motors bundled together, and otherwise adjusted to ensure the thing is clocked and that the motor is enabled and disabled appropriately. The 8272 is also now formally a subclass of the incoming MDM controller.
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2017-08-06 09:45:16 -04:00 |
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Thomas Harte
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3e984e75b6
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Strung up an empty shell that eventually should contain the 8272, and added appropriate IO decoding to the Amstrad.
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2017-08-05 19:45:52 -04:00 |
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Thomas Harte
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9e8645ca7a
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Fixed ROM paging port decoding. It should have been fd00 if completely decoded, not df00, but also shouldn't be completely decoded.
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2017-08-05 19:24:03 -04:00 |
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Thomas Harte
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caf3ac0645
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Sought: (i) to instruct the CPC that it should be a 664, not a 464, if given a disk image (at least until I have RAM paging implemented for a 6128); (ii) to support ROM selection within the CPC and allow paging in of AMSDOS.
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2017-08-05 19:20:38 -04:00 |
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Thomas Harte
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4b19cf60df
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Added omitted semicolon.
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2017-08-05 09:18:55 -04:00 |
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Thomas Harte
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b3788fed41
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Fixed AY queuing behaviour as handled by the Amstrad. I think I need to come up with clearer semantics here.
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2017-08-05 09:12:17 -04:00 |
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Thomas Harte
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a63aa80dc9
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Merge branch 'master' of github.com:TomHarte/CLK
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2017-08-04 16:51:52 -04:00 |
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Thomas Harte
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63f57c8c4f
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Adjusted visible portion of frame; completely empirical, as I'm chasing a machine that shipped with a monitor.
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2017-08-04 16:51:46 -04:00 |
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Thomas Harte
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f075fea78c
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Introduces filtering of the CRTC's vsync signal into the gate array.
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2017-08-04 16:36:55 -04:00 |
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Thomas Harte
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c0f0c68f4f
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Corrects quick-hack version of border drawing: the assumption that the colour must be the same over a plotted period. Also corrects my entry for colour 15.
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2017-08-04 12:13:05 -04:00 |
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Thomas Harte
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d9097facf1
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Found documentation that makes more sense, and in practice seems to be more correct: the test after vertical sync is for greater than 32, not less. Also I decided to chance my arm on counter reset also resetting interrupt request. The raster effects of Ghouls 'n' Ghosts is now pretty much correct but one line off. I think probably either something is off in my wait-two logic on the post-vsync timer event, or possibly the vsync bit exposed via the PPI doesn't mean exactly what I think it means.
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2017-08-04 08:56:09 -04:00 |
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Thomas Harte
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b927500487
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Clarified code a little, but this is mostly fiddling in the margins.
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2017-08-03 22:00:30 -04:00 |
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Thomas Harte
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e71eabedf9
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Fixed timer clearing tet.
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2017-08-03 21:30:04 -04:00 |
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Thomas Harte
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33ed27c3ad
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Minor tidiness: included missing headers, and spaced out the ROM type and key lists for readability.
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2017-08-03 12:45:42 -04:00 |
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Thomas Harte
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575b1dba75
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Formally declared the ZX80/81 and Amstrad CPC as keyboard machines in their public interface. Which means not having to repeat the meaning of set_key_state and clear_all_keys. So: a minor DRY improvement.
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2017-08-03 12:38:22 -04:00 |
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Thomas Harte
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bbb17acf3a
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Expanded interface so that an external machine caller can request a string be typed without any knowledge of whatever it intends to do re: CharacterMappers. Which is immediately useful in paste functionality.
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2017-08-03 11:50:50 -04:00 |
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Thomas Harte
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ad3a98387f
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Within the Typer framework: hatched out CharacterMapper as a distinct thing from the target for keypresses, better to formalise responsibility but also to make it easy cleanly to sever that stuff into its own little part.
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2017-08-03 11:42:31 -04:00 |
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Thomas Harte
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2f2071be8a
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These should actually both be in the public header, as the types are used in an exposed method.
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2017-08-02 22:18:30 -04:00 |
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Thomas Harte
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6d510e4e70
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Made it no longer public knowledge that any sort of Typer is involved in being a ZX80/81.
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2017-08-02 22:17:22 -04:00 |
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Thomas Harte
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8e0736fbe6
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Reinstated typing ability, albeit with an ugly inline insertion. But I think I can defer dealing with typers to another pull request. The whole issue of keyboard mapping probably needs reappraisal.
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2017-08-02 22:16:09 -04:00 |
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Thomas Harte
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681d1e2f8d
|
Breaking its typer for now, adapted the ZX80/81 to having a Z80, not being one.
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2017-08-02 22:12:59 -04:00 |
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Thomas Harte
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42e70ef993
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Adjusted slightly as per Z80 change, and to pull everything internally declared into the Amstrad CPC namespace.
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2017-08-02 22:11:03 -04:00 |
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Thomas Harte
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d3bf8fa53b
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Upped the documentation.
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2017-08-02 20:37:26 -04:00 |
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Thomas Harte
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f5e2dd410e
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Constrained output to the centre 90%.
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2017-08-02 19:55:44 -04:00 |
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Thomas Harte
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e50adf1cc8
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Were my TZX support up to it, this would likely be sufficient for tape emulation.
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2017-08-02 13:50:14 -04:00 |
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Thomas Harte
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dcab10f53e
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Ensured the AY's async queue doesn't just fill and fill.
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2017-08-02 07:38:35 -04:00 |
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Thomas Harte
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f602f9b6ec
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Adds an attempt to clock the AY.
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2017-08-02 07:21:33 -04:00 |
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Thomas Harte
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4d5d5041df
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Attempted to ensure a clean startup.
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2017-08-01 22:18:42 -04:00 |
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Thomas Harte
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587eb3a67c
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Factored interrupt counting out of the CRTCBusHandler.
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2017-08-01 22:15:39 -04:00 |
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Thomas Harte
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8d39a20088
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Added proper output of mode 3, were anything ever to try to use it.
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2017-08-01 21:51:41 -04:00 |
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Thomas Harte
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4b6370eb86
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Realised my colour error: mapping the ROM numbers as though they were the hardware numbers. Having fixed that, spotted that I was deserialising R and B the wrong way around and dividing by too much. Colours now appear to be correct.
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2017-08-01 21:47:52 -04:00 |
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Thomas Harte
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c6e340a8a2
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Wired up the vsync signal. Pen 15 no longer flashes like crazy. Still can't figure out why the palette is so askew; was looking for perhaps some sort of detection of a green screen rather than a colour one, but there's no obvious input for that.
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2017-08-01 21:21:59 -04:00 |
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Thomas Harte
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31c7153301
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Corrected bit to colour mapping for modes 0 and 1. The total palette is still way off but there's consistency between modes now.
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2017-08-01 20:52:42 -04:00 |
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Thomas Harte
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7e04d00cc1
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Fixed key values, causing the new set of keys to work, decreased quantity of output and ensured that pixels appear in modes 0 and 2.
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2017-08-01 20:39:10 -04:00 |
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Thomas Harte
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eca9586a0f
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Fixed: input value is no longer overwritten by 0xff. The '0' key now works.
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2017-08-01 20:19:02 -04:00 |
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Thomas Harte
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2e4577f741
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Made a game attempt at implementing a (sticky) keyboard. No effect yet.
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2017-08-01 17:52:05 -04:00 |
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Thomas Harte
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f5b278d683
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Added enough stuff to put the emulated Amstrad CPC in a state of knowing whether its '0' key is pressed.
|
2017-08-01 17:31:56 -04:00 |
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Thomas Harte
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e6854ff8db
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Corrected typo: the input to an AY is BDIR, not BCDIR.
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2017-08-01 17:06:57 -04:00 |
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Thomas Harte
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3b292273c7
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Fixed: BC2 is always implicitly set. The machine is now periodically checking the AY's register 14 (i.e. the first input port), so probably there's enough here now to implement keyboard input.
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2017-08-01 17:05:11 -04:00 |
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Thomas Harte
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cb732e5d5f
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Made an attempt to wire in an [unclocked] AY, in an endeavour to get to keyboard reading.
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2017-08-01 17:01:58 -04:00 |
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Thomas Harte
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08ad35efd9
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It's barely an implementation of the 8255, but ensured that data is bounced into the PortHandler, conveniently assuming the interaction mode used by the CPC.
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2017-08-01 16:34:13 -04:00 |
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Thomas Harte
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58b98267fc
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Formally transferred ownership of PIO accesses to an incoming template, and decided to start being explicit about how to specify the interfaces and provide fallbacks for optional behaviour for the new, clean generation of interfaces. A full-project sweep will inevitably occur but I'll try to tie off this branch first.
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2017-08-01 16:15:19 -04:00 |
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Thomas Harte
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a27946102a
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Took a shot at the interrupt counter. Attempts at keyboard reading now recur so it'll probably do for now. I think that next puts me into the realm of needing to implement the 8255.
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2017-08-01 15:49:16 -04:00 |
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Thomas Harte
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6ac7132799
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Had a quick go at properly outputting Mode 1, adding wiring to communicate palette and mode changes to the CRTC bus handler. Colours are off but it's sufficient for now.
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2017-08-01 15:16:13 -04:00 |
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Thomas Harte
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ca42abab70
|
Doubled up to ensure that every byte that should be inspected is represented. This makes it clearer that I'm on the right road. A garbled version of 'Amstrad 64k Microcomputer' can be discerned, in a weird grayscale and with the right-hand column missing and skewed output as a result.
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2017-08-01 07:56:44 -04:00 |
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Thomas Harte
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933d69a256
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Fixed slightly: the CPC wiki has a typo. It's 12 and 13 that move up to 14 and 15.
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2017-08-01 07:51:13 -04:00 |
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Thomas Harte
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10a5581aea
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Made first attempt at offering some sort of pictographic of actual RAM contents.
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2017-08-01 07:34:12 -04:00 |
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Thomas Harte
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3ae699964f
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Ensured an actual pixel stream is supplied for pixel regions. Though it's just a long stream of white pixels for now. So visual output is unchanged.
|
2017-08-01 07:24:29 -04:00 |
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Thomas Harte
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9d953421d8
|
After a quick check, added a couple of other _delegate initialisations. I should probably find a way to template this.
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2017-08-01 07:07:43 -04:00 |
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Thomas Harte
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763e3b65d1
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Ensured a proper initial value for delegate_.
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2017-07-31 22:46:06 -04:00 |
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Thomas Harte
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42dd27c9b1
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Shunted method bodies inline, given that there's no need for a declaration/definition distinction.
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2017-07-31 22:39:25 -04:00 |
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Thomas Harte
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3df13cddd4
|
As per my keenness for cleanliness improvements corresponding to my ever-increasing C++ ability: turned the Amstrad into something that a factory produces, allowing me completely to hide a bunch of implementation details.
|
2017-07-31 22:32:04 -04:00 |
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Thomas Harte
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c2253c1e0f
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Fixed multiplier: the dot clock I've used to instantiate the CRT is the pixel clock, not the character clock.
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2017-07-31 22:17:46 -04:00 |
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Thomas Harte
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f742fd5d4a
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Made basic attempt to get something on screen: white where the display is enabled, black for the border.
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2017-07-31 22:13:20 -04:00 |
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Thomas Harte
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69b99fe127
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Transferred ownership of the CRT to the CRTC bus handler, to give it easy access.
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2017-07-31 22:04:52 -04:00 |
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Thomas Harte
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e28829bd1b
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Corrected CRTC timing, gave it someone to talk to and a means with which to talk.
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2017-07-31 20:14:46 -04:00 |
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Thomas Harte
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68ceeab610
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Created a 6845 class and started pushing data at it and clocking it. It doesn't currently have the concept of a bus but will do, hence the in-header implementation.
|
2017-07-31 19:56:59 -04:00 |
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Thomas Harte
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68dca9d047
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Made a first attempt at ROM paging, with pretty much the same scheme that'll be needed for 128kb support.
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2017-07-31 19:37:28 -04:00 |
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Thomas Harte
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d88ca151f4
|
Added a first attempt at output port decoding. Just logging for now.
|
2017-07-31 19:25:10 -04:00 |
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Thomas Harte
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3c90218c3d
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With a very basic stab at something a bit like the memory map (sans paging), execution begins.
|
2017-07-31 19:15:43 -04:00 |
|
Thomas Harte
|
afd409c883
|
Ensured that ROM images are loaded and passed to the Amstrad CPC.
|
2017-07-31 18:44:49 -04:00 |
|
Thomas Harte
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9c04d851e4
|
Added the basics necessary to get the CPU ticking over, at a nominal 4Mhz but with the wait states that I currently believe to be accurate.
|
2017-07-31 07:29:50 -04:00 |
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Thomas Harte
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1d6fe11906
|
Added an instance of Outputs::CRT::CRT. So progress is now: select CDT, up comes a blank window.
|
2017-07-31 07:16:51 -04:00 |
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Thomas Harte
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c0f1313830
|
Performed sufficient wiring to get to the point where attempting to load a CDT creates an instance of the Amstrad CPC and then fails only because the thing vends a nullptr CRT.
|
2017-07-30 22:05:29 -04:00 |
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Thomas Harte
|
4abd62e62b
|
Standardises on const [Half]Cycles as the thing called and returned, rather than const [Half]Cycles & as it's explicitly defined to be only one int in size, so using a reference is overly weighty.
|
2017-07-27 22:05:29 -04:00 |
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Thomas Harte
|
968d2bb8ba
|
Brought Typer into the new run_for orthodoxy, making it easier to clock consistently regardless of unit. Which necessitated adding a negative operator for WrappedInts.
|
2017-07-27 21:53:45 -04:00 |
|
Thomas Harte
|
9ef232157b
|
Revoked the operator bool() on WrappedInt as providing an indirect means for implicit but incorrect assignment to unwrapped ints. Got explicit about run_for intention and simplified HalfClockReceiver slightly by building a lossy and a flushing conversion to Cycles into HalfCycles. Adapted the all-RAM Z80 properly to return HalfCycles.
|
2017-07-27 21:38:50 -04:00 |
|
Thomas Harte
|
8848ebbd4f
|
Formalised set_interrupt_line's optional parameter as being a count of HalfCycles; corrected PartialMachineCycle.is_wait and effected the proper timing for counter reset on a ZX81.
|
2017-07-27 21:10:14 -04:00 |
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Thomas Harte
|
8361756dc4
|
Switched definitively to the works-for-now approach of requiring an explicit opt-in where somebody wants to clock a whole-cycle receiver from a half-cycle clock.
|
2017-07-27 07:40:02 -04:00 |
|
Thomas Harte
|
81a3899381
|
Adjusted the Z80 formally to communicate in terms of half cycles rather than whole.
|
2017-07-26 19:42:00 -04:00 |
|
Thomas Harte
|
cda223ffc0
|
Added explicit signedness cast.
|
2017-07-25 22:49:03 -04:00 |
|
Thomas Harte
|
966b5e6372
|
Adapted the Z80's perform_machine_cycle to return Cycles.
|
2017-07-25 22:25:44 -04:00 |
|
Thomas Harte
|
279c369a1f
|
Switched to Cycles as the result from the 6502 perform_bus_operation, helping slightly to clarify what you're intended to return and reducing type jumping within the 6502 implementation.
|
2017-07-25 22:21:09 -04:00 |
|
Thomas Harte
|
d9c6b3bcf7
|
Corrected TIA's WSYNC lookahead to accept Cycles.
|
2017-07-25 22:13:41 -04:00 |
|
Thomas Harte
|
296c7cec05
|
Adopted flush widely.
|
2017-07-25 20:42:51 -04:00 |
|
Thomas Harte
|
75d67ee770
|
Relocated ClockReceiver.hpp as it's a dependency for parts of the static analyser, and therefore needs to be distinct from the actual emulation parts.
|
2017-07-25 20:20:55 -04:00 |
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Thomas Harte
|
a1e9a54765
|
Eliminated redundant uses of ClockReceiver and sought to ensure that proper run_fors are inherited all the way down.
|
2017-07-25 20:09:13 -04:00 |
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Thomas Harte
|
8d1dacd951
|
Clean ups along the Electron::Tape line: ensured that the ClockReceiver is opted into only once, and that its run_for propagates all the way along the chain.
|
2017-07-25 20:01:30 -04:00 |
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Thomas Harte
|
40339a12e1
|
Formalised the use of a cycles count with a divider, bringing a few additional plain-int users into the fold.
|
2017-07-25 07:15:31 -04:00 |
|
Thomas Harte
|
90bf6565d0
|
Reduced int/Cycle conversions in the Electron and on the Atari 2600, where the current framework makes it possible to do so.
|
2017-07-24 22:53:13 -04:00 |
|
Thomas Harte
|
c1527cc9e2
|
Reduced back-and-forth between Cycles and ints within the Oric.
|
2017-07-24 22:46:31 -04:00 |
|
Thomas Harte
|
c77a83d86f
|
The 6560 is now a ClockReceiver. This reduces to zero the number of remaining instances of the text run_for_cycles in this codebase.
|
2017-07-24 22:38:35 -04:00 |
|
Thomas Harte
|
a6e377aa57
|
The Electron's video is now a ClockReceiver.
|
2017-07-24 22:36:42 -04:00 |
|
Thomas Harte
|
9435c1e12a
|
The 1540 is now a ClockReceiver.
|
2017-07-24 22:32:41 -04:00 |
|
Thomas Harte
|
efdac2ce8c
|
The 6522 is now a ClockReceiver.
|
2017-07-24 22:29:09 -04:00 |
|
Thomas Harte
|
2912d7055b
|
The 6532 is now a ClockReceiver.
|
2017-07-24 21:57:24 -04:00 |
|
Thomas Harte
|
55ecb0c022
|
Converted the Microdisc into a ClockReceiver.
|
2017-07-24 21:51:13 -04:00 |
|
Thomas Harte
|
13f7aa4063
|
The TIA is now a ClockReceiver.
|
2017-07-24 21:48:34 -04:00 |
|
Thomas Harte
|
915f587ef1
|
Updated the Electron's tape class to be a ClockReceiver.
|
2017-07-24 21:36:30 -04:00 |
|
Thomas Harte
|
b7f88e8f61
|
Filter is now a ClockReciever, affecting all sound output devices.
|
2017-07-24 21:29:13 -04:00 |
|
Thomas Harte
|
8a2bdb8d22
|
Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
|
2017-07-24 21:19:05 -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
|
ba088e5545
|
Adapted the Z80 into a clock receiver, which also vends Cycles rather than a raw int within its PartialMachineCycle struct. The objective is to update it to vend HalfCycles within its struct, but I think I need to do some work on cycle/half-cycle arithmetic first.
|
2017-07-23 22:15:04 -04:00 |
|
Thomas Harte
|
6369138bd1
|
Converted the Oric's video output into a ClockReceiver.
|
2017-07-22 23:11:30 -04:00 |
|
Thomas Harte
|
c2a7dffa7d
|
Converted the ZX80/81 video component into a ClockReceiver. As it happens, it's most convenient to take the half-cycle bus here.
|
2017-07-22 23:02:28 -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
|
83628b285b
|
Experimentally turned the 6502 into a clock receiver. No problem encountered.
|
2017-07-22 21:52:21 -04:00 |
|
Thomas Harte
|
1bbb4cb478
|
Increased documentation.
|
2017-07-22 17:39:51 -04:00 |
|