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Commit Graph

851 Commits

Author SHA1 Message Date
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
9d953421d8 After a quick check, added a couple of other _delegate initialisations. I should probably find a way to template this. 2017-08-01 07:07:43 -04:00
Thomas Harte
763e3b65d1 Ensured a proper initial value for delegate_. 2017-07-31 22:46:06 -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
c2253c1e0f Fixed multiplier: the dot clock I've used to instantiate the CRT is the pixel clock, not the character clock. 2017-07-31 22:17:46 -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
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
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
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
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
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
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