Thomas Harte
ce78d9d12c
Introduces buffer alignment when writing to textures.
...
To avoid cross-boundary writes and hopefully to eke out a little better performance.
2017-10-17 22:09:48 -04:00
Thomas Harte
edbc60a3fb
Various undefined behaviour fixes.
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Primarily around uninitialised variables, but also with an attempted use of a negative pointer.
2017-10-17 21:29:19 -04:00
Thomas Harte
0c2dd62328
Various undefined behaviour fixes.
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Primarily around uninitialised variables, but also with an attempted use of a negative pointer.
2017-10-17 20:50:46 -04:00
Thomas Harte
78ee46270b
Transfers possession of keyboard mappings from the Mac side over to individual machines.
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Specifically by establishing an intermediate representation of a useful mix between the American and British IBM and Mac keyboard layouts, and routing through that.
2017-10-12 22:25:02 -04:00
Thomas Harte
edb9fd301c
Begins this project's conversion to functional-style casts.
2017-10-03 22:04:15 -04:00
Thomas Harte
da082673d7
Drives now have a finite number of heads.
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The Amstrad volunteers itself to be single sided. Everything else stays as it was.
2017-09-15 21:18:36 -04:00
Thomas Harte
d3c385b471
Separates the 8272's drive selection signalling from actual drive ownership.
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Thereby returns working motor control to the CPC.
2017-09-11 21:25:26 -04:00
Thomas Harte
96bf133924
Withdraws requirement for DiskController users to specify a PLL multiplier or to provide rotation speed.
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In the latter case because it's no longer of any interest to the controller, and in the former because I'd rather it be picked automatically.
2017-09-10 22:56:05 -04:00
Thomas Harte
0622187ddf
Strips Controller of all capabilities now housed on the Drive.
2017-09-10 19:23:23 -04:00
Thomas Harte
57bfec285f
Makes it optional whether the Z80 supports the wait line. If the wait line isn't in use, runtime costs are decreased because the optional wait cycles need not be iterated over.
2017-08-26 23:08:57 -04:00
Thomas Harte
e7ad79c79a
Breaks apart the CPC's 6845 bus handler to obey phase 1 and phase 2, and now back-dates interrupts when appropriate.
2017-08-26 14:07:51 -04:00
Thomas Harte
6e99169348
Permits the 6845's bus state to be examined by an owner, eliminating the need to buffer it in the bus handler. But more than that it allows the CRTC to decide when it adjusts the various outputs respective to the main phase. So a net effect of the change is that the CPC now sees vsync a cycle earlier, because my current reading of the 6845 datasheet is that it is set at the end of phase 1, not the beginning of the next phase 1.
2017-08-26 12:59:59 -04:00
Thomas Harte
ee71be0e7e
Added the option not to include ready line support in the 6502 core, and took advantage of it in the Electron, Oric and Vic-20 implementations. Also tagged those as forceinline and/or override final where applicable.
2017-08-21 21:56:42 -04:00
Thomas Harte
cde29c4bf4
Added forceinlines and properly declared finals and overrides.
2017-08-21 21:07:10 -04:00
Thomas Harte
e1aded0d95
Allows Z80 users to opt out of support for the bus request line. Which both now do.
2017-08-21 20:43:12 -04:00
Thomas Harte
0cbc1753b9
Quick fixes: the binary tape player now considers talk to the sleep observer only if motor control changes. The Amstrad CPC no longer attempts to use the component argument to identify the caller, since this will often be that of the superclass and not that of the derived class known to the CPC.
2017-08-20 13:18:46 -04:00
Thomas Harte
8f5ae4a326
The CPC now responds to tape-originating sleeper observations.
2017-08-20 12:21:02 -04:00
Thomas Harte
e88a51e75e
Worked logic all the way down to the CPC. If the 8272 announces that it is asleep, it is now no longer clocked. Also very slightly cut down on IRQ line chatter to the Z80.
2017-08-20 12:05:00 -04:00
Thomas Harte
85253a5876
Sought further to reduce the processing footprint of palette changes by updating only those table entries that are affected by a change.
2017-08-20 10:13:23 -04:00
Thomas Harte
911ee5a0d3
At least added a fast return.
2017-08-19 22:22:51 -04:00
Thomas Harte
57c5b38a6d
Step one towards cutting much of this cost: build only the table that's appropriate for the current mode, and at least declare when a more minimal change would be sufficient.
2017-08-19 22:19:46 -04:00
Thomas Harte
f68565a33f
Split the static analyser functionality so that it's possible just to ask for the set of media implied by a particular file. Extended ConfigurationTarget so that media alone can be pushed to a machine.
2017-08-17 10:48:29 -04:00
Thomas Harte
b476f06524
Slowed the typer, having discovered that otherwise it has problems transitioning from a shifted to an unshifted character.
2017-08-16 22:12:16 -04:00
Thomas Harte
3947347d88
Introduces active input handling for the AY and uses it in the CPC to give proper, active keyboard input, rather than push-on-select, which was only ever a temporary hack. Also maps a few more keys for the Amstrad.
2017-08-15 22:47:17 -04:00
Thomas Harte
334872d374
Clarified, slightly.
2017-08-14 12:47:11 -04:00
Thomas Harte
7ea703f150
Started making provisions for a DMA-compatible implementation. Re: the CPC, it sounds like DMA acknowledge might be permanently wired, causing DMA mode seemingly to work from the 8272's point of view.
2017-08-14 08:38:00 -04:00
Thomas Harte
1d8edf58dd
Ensured that a virtual destructor is declared, so that the various automatically-generated real constructors get in on the action.
2017-08-11 12:07:48 -04:00
Thomas Harte
4785e316ff
Now with exposition.
2017-08-11 11:36:03 -04:00
Thomas Harte
44da9de5b0
Tweaked typing timing expectations.
2017-08-11 11:35:28 -04:00
Thomas Harte
570d25214e
Made an initial attempt at typer support for the CPC.
2017-08-11 11:21:07 -04:00
Thomas Harte
cf810d8357
Minor: ensure the CRT is set to output as a monitor.
2017-08-10 14:42:47 -04:00
Thomas Harte
4961fda2a9
Ensured counter-intuitive CRTC writes get through, taking the opportunity to correct my handling of port IO in general: selecting multiple devices for input results in a logical AND (i.e. open collector mode), and both the CRTC and gate array will receive data from 'input's if applicable.
2017-08-10 12:39:19 -04:00
Thomas Harte
6a6e5ae79c
Forced users of the 6845 to be explicit about which type. So far with no effect.
2017-08-10 12:28:57 -04:00
Thomas Harte
484524d781
Implements RAM paging. The 6128 is now emulated.
2017-08-08 16:01:56 -04:00
Thomas Harte
a7103f9333
Disks are now communicated to the 8272. Which is able to handle four of them.
2017-08-06 13:24:14 -04:00
Thomas Harte
29288b690e
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.
2017-08-06 09:45:16 -04:00
Thomas Harte
3e984e75b6
Strung up an empty shell that eventually should contain the 8272, and added appropriate IO decoding to the Amstrad.
2017-08-05 19:45:52 -04:00
Thomas Harte
9e8645ca7a
Fixed ROM paging port decoding. It should have been fd00 if completely decoded, not df00, but also shouldn't be completely decoded.
2017-08-05 19:24:03 -04:00
Thomas Harte
caf3ac0645
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.
2017-08-05 19:20:38 -04:00
Thomas Harte
4b19cf60df
Added omitted semicolon.
2017-08-05 09:18:55 -04:00
Thomas Harte
b3788fed41
Fixed AY queuing behaviour as handled by the Amstrad. I think I need to come up with clearer semantics here.
2017-08-05 09:12:17 -04:00
Thomas Harte
a63aa80dc9
Merge branch 'master' of github.com:TomHarte/CLK
2017-08-04 16:51:52 -04:00
Thomas Harte
63f57c8c4f
Adjusted visible portion of frame; completely empirical, as I'm chasing a machine that shipped with a monitor.
2017-08-04 16:51:46 -04:00
Thomas Harte
f075fea78c
Introduces filtering of the CRTC's vsync signal into the gate array.
2017-08-04 16:36:55 -04:00
Thomas Harte
c0f0c68f4f
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.
2017-08-04 12:13:05 -04:00
Thomas Harte
d9097facf1
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.
2017-08-04 08:56:09 -04:00
Thomas Harte
b927500487
Clarified code a little, but this is mostly fiddling in the margins.
2017-08-03 22:00:30 -04:00
Thomas Harte
e71eabedf9
Fixed timer clearing tet.
2017-08-03 21:30:04 -04:00
Thomas Harte
42e70ef993
Adjusted slightly as per Z80 change, and to pull everything internally declared into the Amstrad CPC namespace.
2017-08-02 22:11:03 -04:00
Thomas Harte
d3bf8fa53b
Upped the documentation.
2017-08-02 20:37:26 -04:00
Thomas Harte
f5e2dd410e
Constrained output to the centre 90%.
2017-08-02 19:55:44 -04:00
Thomas Harte
e50adf1cc8
Were my TZX support up to it, this would likely be sufficient for tape emulation.
2017-08-02 13:50:14 -04:00
Thomas Harte
dcab10f53e
Ensured the AY's async queue doesn't just fill and fill.
2017-08-02 07:38:35 -04:00
Thomas Harte
f602f9b6ec
Adds an attempt to clock the AY.
2017-08-02 07:21:33 -04:00
Thomas Harte
4d5d5041df
Attempted to ensure a clean startup.
2017-08-01 22:18:42 -04:00
Thomas Harte
587eb3a67c
Factored interrupt counting out of the CRTCBusHandler.
2017-08-01 22:15:39 -04:00
Thomas Harte
8d39a20088
Added proper output of mode 3, were anything ever to try to use it.
2017-08-01 21:51:41 -04:00
Thomas Harte
4b6370eb86
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.
2017-08-01 21:47:52 -04:00
Thomas Harte
c6e340a8a2
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.
2017-08-01 21:21:59 -04:00
Thomas Harte
31c7153301
Corrected bit to colour mapping for modes 0 and 1. The total palette is still way off but there's consistency between modes now.
2017-08-01 20:52:42 -04:00
Thomas Harte
7e04d00cc1
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.
2017-08-01 20:39:10 -04:00
Thomas Harte
eca9586a0f
Fixed: input value is no longer overwritten by 0xff. The '0' key now works.
2017-08-01 20:19:02 -04:00
Thomas Harte
2e4577f741
Made a game attempt at implementing a (sticky) keyboard. No effect yet.
2017-08-01 17:52:05 -04:00
Thomas Harte
f5b278d683
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
Thomas Harte
e6854ff8db
Corrected typo: the input to an AY is BDIR, not BCDIR.
2017-08-01 17:06:57 -04:00
Thomas Harte
3b292273c7
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.
2017-08-01 17:05:11 -04:00
Thomas Harte
cb732e5d5f
Made an attempt to wire in an [unclocked] AY, in an endeavour to get to keyboard reading.
2017-08-01 17:01:58 -04:00
Thomas Harte
08ad35efd9
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.
2017-08-01 16:34:13 -04:00
Thomas Harte
58b98267fc
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.
2017-08-01 16:15:19 -04:00
Thomas Harte
a27946102a
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.
2017-08-01 15:49:16 -04:00
Thomas Harte
6ac7132799
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.
2017-08-01 15:16:13 -04:00
Thomas Harte
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.
2017-08-01 07:56:44 -04:00
Thomas Harte
933d69a256
Fixed slightly: the CPC wiki has a typo. It's 12 and 13 that move up to 14 and 15.
2017-08-01 07:51:13 -04:00
Thomas Harte
10a5581aea
Made first attempt at offering some sort of pictographic of actual RAM contents.
2017-08-01 07:34:12 -04:00
Thomas Harte
3ae699964f
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
Thomas Harte
42dd27c9b1
Shunted method bodies inline, given that there's no need for a declaration/definition distinction.
2017-07-31 22:39:25 -04:00
Thomas Harte
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
Thomas Harte
f742fd5d4a
Made basic attempt to get something on screen: white where the display is enabled, black for the border.
2017-07-31 22:13:20 -04:00
Thomas Harte
69b99fe127
Transferred ownership of the CRT to the CRTC bus handler, to give it easy access.
2017-07-31 22:04:52 -04:00
Thomas Harte
e28829bd1b
Corrected CRTC timing, gave it someone to talk to and a means with which to talk.
2017-07-31 20:14:46 -04:00
Thomas Harte
68ceeab610
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
Thomas Harte
68dca9d047
Made a first attempt at ROM paging, with pretty much the same scheme that'll be needed for 128kb support.
2017-07-31 19:37:28 -04:00
Thomas Harte
d88ca151f4
Added a first attempt at output port decoding. Just logging for now.
2017-07-31 19:25:10 -04:00
Thomas Harte
3c90218c3d
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
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
Thomas Harte
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
Thomas Harte
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
