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
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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.
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2017-08-01 07:24:29 -04:00 |
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Thomas Harte
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9d953421d8
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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
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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.
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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.
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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
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Added a first attempt at output port decoding. Just logging for now.
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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.
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2017-07-31 19:15:43 -04:00 |
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Thomas Harte
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afd409c883
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Ensured that ROM images are loaded and passed to the Amstrad CPC.
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2017-07-31 18:44:49 -04:00 |
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Thomas Harte
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9c04d851e4
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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.
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2017-07-31 07:29:50 -04:00 |
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Thomas Harte
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1d6fe11906
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Added an instance of Outputs::CRT::CRT. So progress is now: select CDT, up comes a blank window.
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2017-07-31 07:16:51 -04:00 |
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Thomas Harte
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c0f1313830
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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.
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2017-07-30 22:05:29 -04:00 |
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Thomas Harte
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4abd62e62b
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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.
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2017-07-27 22:05:29 -04:00 |
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Thomas Harte
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968d2bb8ba
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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.
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2017-07-27 21:53:45 -04:00 |
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Thomas Harte
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9ef232157b
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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.
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2017-07-27 21:38:50 -04:00 |
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Thomas Harte
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8848ebbd4f
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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.
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2017-07-27 21:10:14 -04:00 |
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Thomas Harte
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8361756dc4
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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.
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2017-07-27 07:40:02 -04:00 |
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Thomas Harte
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81a3899381
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Adjusted the Z80 formally to communicate in terms of half cycles rather than whole.
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2017-07-26 19:42:00 -04:00 |
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Thomas Harte
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cda223ffc0
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Added explicit signedness cast.
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2017-07-25 22:49:03 -04:00 |
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Thomas Harte
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966b5e6372
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Adapted the Z80's perform_machine_cycle to return Cycles.
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2017-07-25 22:25:44 -04:00 |
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Thomas Harte
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279c369a1f
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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.
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2017-07-25 22:21:09 -04:00 |
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Thomas Harte
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d9c6b3bcf7
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Corrected TIA's WSYNC lookahead to accept Cycles.
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2017-07-25 22:13:41 -04:00 |
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Thomas Harte
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296c7cec05
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Adopted flush widely.
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2017-07-25 20:42:51 -04:00 |
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Thomas Harte
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75d67ee770
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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.
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2017-07-25 20:20:55 -04:00 |
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Thomas Harte
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a1e9a54765
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Eliminated redundant uses of ClockReceiver and sought to ensure that proper run_fors are inherited all the way down.
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2017-07-25 20:09:13 -04:00 |
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Thomas Harte
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8d1dacd951
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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.
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2017-07-25 20:01:30 -04:00 |
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Thomas Harte
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40339a12e1
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Formalised the use of a cycles count with a divider, bringing a few additional plain-int users into the fold.
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2017-07-25 07:15:31 -04:00 |
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Thomas Harte
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90bf6565d0
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Reduced int/Cycle conversions in the Electron and on the Atari 2600, where the current framework makes it possible to do so.
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2017-07-24 22:53:13 -04:00 |
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Thomas Harte
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c1527cc9e2
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Reduced back-and-forth between Cycles and ints within the Oric.
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2017-07-24 22:46:31 -04:00 |
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Thomas Harte
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c77a83d86f
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The 6560 is now a ClockReceiver. This reduces to zero the number of remaining instances of the text run_for_cycles in this codebase.
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2017-07-24 22:38:35 -04:00 |
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Thomas Harte
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a6e377aa57
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The Electron's video is now a ClockReceiver.
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2017-07-24 22:36:42 -04:00 |
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Thomas Harte
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9435c1e12a
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The 1540 is now a ClockReceiver.
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2017-07-24 22:32:41 -04:00 |
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Thomas Harte
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efdac2ce8c
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The 6522 is now a ClockReceiver.
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2017-07-24 22:29:09 -04:00 |
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Thomas Harte
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2912d7055b
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The 6532 is now a ClockReceiver.
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2017-07-24 21:57:24 -04:00 |
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Thomas Harte
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55ecb0c022
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Converted the Microdisc into a ClockReceiver.
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2017-07-24 21:51:13 -04:00 |
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Thomas Harte
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13f7aa4063
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The TIA is now a ClockReceiver.
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2017-07-24 21:48:34 -04:00 |
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Thomas Harte
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915f587ef1
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Updated the Electron's tape class to be a ClockReceiver.
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2017-07-24 21:36:30 -04:00 |
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Thomas Harte
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b7f88e8f61
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Filter is now a ClockReciever, affecting all sound output devices.
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2017-07-24 21:29:13 -04:00 |
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Thomas Harte
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8a2bdb8d22
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Converted the TimedEventLoop and the things that sit atop it into ClockReceivers.
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2017-07-24 21:19:05 -04:00 |
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Thomas Harte
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b82bef95f3
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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.
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2017-07-24 20:10:05 -04:00 |
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