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1095 Commits

Author SHA1 Message Date
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
3831fbaca2 Ensured the ZX80 and '81 also provide the necessary hook for destruction. 2017-08-11 12:11:01 -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
4ecd093891 Fixed test for termination of a key sequence; the previous error will have seen this reduce all multi-key sequences to just the one, and expand single-key sequences to "probably" two, posting an out-of-bounds code to the machine at completion. 2017-08-11 11:35:14 -04:00
Thomas Harte
dd4bc87d52 Fixed: should be a full-path #ifdef guard, given that this is one of the classes named relative to its namespace. 2017-08-11 11:21:33 -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
33ed27c3ad Minor tidiness: included missing headers, and spaced out the ROM type and key lists for readability. 2017-08-03 12:45:42 -04:00
Thomas Harte
575b1dba75 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. 2017-08-03 12:38:22 -04:00
Thomas Harte
bbb17acf3a 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. 2017-08-03 11:50:50 -04:00
Thomas Harte
ad3a98387f 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. 2017-08-03 11:42:31 -04:00
Thomas Harte
2f2071be8a These should actually both be in the public header, as the types are used in an exposed method. 2017-08-02 22:18:30 -04:00
Thomas Harte
6d510e4e70 Made it no longer public knowledge that any sort of Typer is involved in being a ZX80/81. 2017-08-02 22:17:22 -04:00
Thomas Harte
8e0736fbe6 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. 2017-08-02 22:16:09 -04:00
Thomas Harte
681d1e2f8d Breaking its typer for now, adapted the ZX80/81 to having a Z80, not being one. 2017-08-02 22:12:59 -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
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
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
Thomas Harte
d46da6ac9d Added documentation. 2017-07-22 17:31:12 -04:00
Thomas Harte
dddb30477b Used a different inner-loop variable, for clarity. 2017-07-21 21:52:08 -04:00
Thomas Harte
37459a3ebc Fixed parameter shadowing. 2017-07-21 21:51:18 -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
2471ef805b Fixed signed/unsigned comparison and potential negative table reference. 2017-07-21 20:45:49 -04:00
Thomas Harte
a3e0024980 Chopped time accumulation out of the default Tape process because it's proving to be sufficiently expensive for a TZX as not to be worthwhile. Introduced a cheaper position capturing/restoring method. 2017-07-21 18:55:03 -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
b3861ff755 Reduced copying of Pulses. 2017-07-16 19:49:31 -04:00
Thomas Harte
1d3ae31755 Abstracted the concept of an Acorn shifter away from being a PLLParser. The Acorn tape parser now skips using that class and uses the shifter. The actual Electron also uses the shifter. So the two are completely aligned. Net result: the Electron should successfully load exactly when static analysis was successful. 2017-07-16 19:24:01 -04:00
Thomas Harte
f931cd582d Switched to use of std::vector in those few remaining places where I was still using a unique_ptr to a native type and newing for myself. So, some of my earliest bits of code. 2017-07-16 13:54:07 -04:00
Thomas Harte
481487f084 Oh yuck, it looks like I've repeated this same test in two different places. Must figure out where to factor it out to. But in the meantime, the emulated Electron has just loaded its first CSW. 2017-07-13 22:39:30 -04:00
Thomas Harte
ac59dd8b1d Added enough typing to issue a load command. No thoughts as to running yet though. 2017-07-09 22:07:12 -04:00
Thomas Harte
353c854734 Removed a TODO that is no longer appropriate. 2017-07-09 22:06:50 -04:00
Thomas Harte
3e5c209039 Added basic Typer support for the ZX80 and '81. 2017-07-09 22:00:34 -04:00
Thomas Harte
ed28260aaf Hardens the ZX80/81 video routines to ensure they never try to push data into the future and don't double-count time when pixels would ostensibly run into sync. You could previously see the CRT being handed negative run lengths if sync interrupted pixels or if a run of more than 320 pixels (my arbitrary buffer size) occurred, with corresponding poor behaviour given my use of unsigned numbers. 2017-07-09 19:33:05 -04:00
Thomas Harte
87658e83c1 Moved line counter reset logic; I think this is actually correct. 2017-07-09 00:05:30 -04:00
Thomas Harte
4509c3ce34 By observation, it appears that disabling vsync occurs on any port output whatsoever, as long as NMI isn't blocking it. 2017-07-08 21:01:52 -04:00
Thomas Harte
30e93979d2 Removed data work if sync is enabled; in that case no data is output. 2017-07-08 21:01:07 -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
22389a5d2d Merge branch 'master' into HiRes 2017-07-08 20:38:25 -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
46fff8e8a2 Ensured bit 8 is uniquely from the latched video byte, not an OR of that with the refresh address. 2017-07-06 22:48:48 -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
b842c5b8bb Merge branch 'master' into ZX81FastLoading 2017-07-06 22:03:24 -04:00
Thomas Harte
0c037627fc Typer fixes: the recipient no longer releases the caller, and a duplicate call to strlen and piece of arithmetic is corrected. 2017-07-06 21:38:56 -04:00
Thomas Harte
a72a2e0a1a Ensured tape doesn't proceed of its own volition when in fast-loading mode. 2017-06-23 20:21:37 -04:00
Thomas Harte
50375fb373 Ensured tape position is unaffected if the attempt at loading quickly fails. 2017-06-23 20:18:19 -04:00
Thomas Harte
cb105fdeb4 Took a first stab at high-res support. 2017-06-22 22:48:17 -04:00
Thomas Harte
acfd4dde36 Reduced port writes which can adjust programmatic sync, and prevented anything while NMI generation is active. Moved line counter increment from triggered by interrupt acknowledge to triggered by horizontal sync. In both cases, cribbing from my own earlier work. Initial results suggest that sync issues are resolved in third-party software. 2017-06-22 22:44:06 -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
b7c978e078 Added getters for most of the input lines, and attempted to round out the ZX81's wait logic. 2017-06-22 20:11:19 -04:00
Thomas Harte
52d9ddf9e5 Gave the binary tape player a more logical assignment of wave level to output level. Which miraculously appears to have been the issue with the ZX80/81 tape loading — the inconsistency of silences seems to have been the issue. 2017-06-21 22:13:24 -04:00
Thomas Harte
a6810fc3ef Removed some minor duplicity and ensured that hsync/NMI ends on the nominated cycle, not one afterwards. 2017-06-21 21:44:42 -04:00
Thomas Harte
15f6c51062 Added the most trivial implementation of the ZX81 wait line. 2017-06-21 21:28:14 -04:00
Thomas Harte
e1355d4b62 Restored proper video output. 2017-06-21 21:18:09 -04:00
Thomas Harte
4bf13610ce Reinstated interrupts by moving the refresh test back into the refresh cycle. 2017-06-21 21:03:39 -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
36e8a11505 Sought to simplify the way partial machine cycles are communicated, for ease of machine implementation. Also implemented the wait line. 2017-06-21 20:32:08 -04:00
Thomas Harte
e1a2580b2a Renamed BusOperation to MachineCycle::Operation. 2017-06-17 21:53:45 -04:00
Thomas Harte
08a542a324 Reenabled the fast-loading hack. 2017-06-15 18:30:12 -04:00
Thomas Harte
9b3d05e05f Simplified decoding logic. 2017-06-14 22:24:44 -04:00
Thomas Harte
d8e3103a2b Fixes: switched ZX80 and ZX81 timing to the correct way around, ensured that my wait takes effect if HALT **isn't** set, and made sure to recover from it. 2017-06-13 21:48:17 -04:00
Thomas Harte
76a64d13a0 Made a first attempt at ZX81 emulation. 2017-06-13 21:25:55 -04:00
Thomas Harte
1e975859c2 Started splitting ZX80 and ZX81 paths. Also the '80 fires its horizontal sync a little earlier than the '81, so pulled that back a little. 2017-06-13 20:09:09 -04:00
Thomas Harte
4c5261bfa0 Made first attempt to use the horizontal counter for something; here for sync timing only, even though I've gone exclusively with '81-style timing for now. 2017-06-12 22:28:30 -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
b9dbb6bcf8 Discovered my timing error: the I/R <-> A loads should take an extra cycle. This means the ZX80 now finally takes the correct 207 cycles per line. Fixed the video output wave to be clocked at the appropriate rate. 2017-06-12 18:55:04 -04:00
Thomas Harte
302c2e94de Corrected lingering hard-coded mask. So titles for memory configurations above 1kb now load. 2017-06-11 21:27:46 -04:00
Thomas Harte
06fe07932a While tidying up, killed an unused instance variable. 2017-06-11 21:21:26 -04:00
Thomas Harte
6913c7a018 This also can just use rom_mask_. 2017-06-11 19:29:20 -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
e5b30cdfbb Attempted to ensure appropriate resumption of processing after quick-reading a tape byte. 2017-06-11 17:28:47 -04:00
Thomas Harte
ba5f34f827 Narrowed view to the centre 80% of a frame. 2017-06-11 17:24:32 -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
d910a4fd38 Adjusted to signal an interrupt during the refresh cycle rather than weirdly just afterwards. Which cuts video timing down by 4 cycles a line. There still might be a problem here somewhere though, as I'm getting 206 cycles/line and the internet states it should be 207. 
Also: lots of printfs have grown temporarily as I try to figure out what I'm doing so wrong as to break loading.
 2017-06-11 13:32:20 -04:00
Thomas Harte
5626d35bc4 Tried flipping the bit meaning; decided at least to leave it in full-byte form. 2017-06-06 18:38:05 -04:00
Thomas Harte
63e0802f4e Ensured tape input appears on the returned value. 2017-06-06 18:16:27 -04:00
Thomas Harte
e3ee9604a5 Added comments. 2017-06-06 18:01:33 -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
ebbf6e6133 Surprisingly, I think this may actually be the correct output: stopped throwing away the I part of the refresh register and flipped black and white. 2017-06-06 09:03:09 -04:00
Thomas Harte
cba07dec7e Doubled up to display all eight pixels. To confirm that they are the wrong pixels. 2017-06-06 08:59:00 -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
ef4b2f963d Probably more-or-less corrected. But this is all a bit too interdependent. 2017-06-05 23:52:56 -04:00
Thomas Harte
97f3ff03b6 Restored white background and attempted to correct output timing deficiencies. Incomplete success. 2017-06-05 23:50:04 -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
23ca00fd9a Added memory fuzzing as a way to verify state being written by the Z80. Eventually discovered the HALT problem as fixed in the last commit, so have stripped away the caveman stuff again. 2017-06-05 10:36:07 -04:00
Thomas Harte
893f61b490 Attempted specifically to reproduce the 1kb ZX80 memory map in the hope of getting compact lines and in case mirroring is why I'm getting completely empty video reads. Still no action. 2017-06-05 09:38:49 -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
73654d51dd Wired up actually to run. 2017-06-04 18:37:13 -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
Thomas Harte
2562306802 Merge branch 'master' into Z80 2017-05-16 21:05:00 -04:00
Thomas Harte
2ee8a7056e Corrected TIA no longer to assume phase is an automatic quarter askew. 2017-05-16 20:43:28 -04:00
Thomas Harte
a5075d9eb5 Formalised the reasoning behind the colour phase fix-up and made it an opt-in per-caller value. Only the Oric currently needs to opt in. 2017-05-16 20:31:39 -04:00
Thomas Harte
eb8a2de5d6 Settled definitively on flush as more communicative than synchronise (and slightly more locale neutral); culled some more duplication from the Z80. 2017-05-15 07:38:59 -04:00
Thomas Harte
0808e9b6fb Pulled the 6502 into a CPU namespace, making it an instance of something that has micro-opcodes and schedules them, and factoring out the formulation of a register pair. 2017-05-14 22:08:15 -04:00
Thomas Harte
8e35e913bb Formally withdrew the 'load automatically' option for the Vic, having removed that option elsewhere. 2017-05-14 16:59:24 -04:00
Thomas Harte
5d91a2600d Permitted ROM-style PRGs that are not a power-of-two in size, and added extra safety checks on loading data from a tape. 2017-05-08 22:15:35 -04:00
Thomas Harte
cb66c7e2dc Performed some minor tidying. 2017-05-08 21:05:35 -04:00
Thomas Harte
61f8f2f18c Switched to a more straightforward way of exiting from tape data loading. 2017-05-08 20:58:55 -04:00
Thomas Harte
7b43ae0a92 Implemented a catch for loading the data portion of files. 2017-05-07 22:22:59 -04:00
Thomas Harte
2807e3134f Implemented speedy header finding. So that's half of it. 2017-05-07 20:32:48 -04:00
Thomas Harte
0771363f3b Removed one piece of unnecessary logging. 2017-05-06 22:22:03 -04:00
Thomas Harte
2edf73908c Temporarily disabled the existing fast loading implementation in pursuit of another, and started trying to correct the lack of connection between the userport VIA and the tape drive. 2017-05-06 22:00:12 -04:00
Thomas Harte
ed6b135015 Made final switch to permit high-sampling rate Atari audio. 2017-04-15 21:18:00 -04:00
Thomas Harte
f95015c7f6 Pulled out the divisor for audio. 2017-04-03 21:16:39 -04:00
Thomas Harte
814c0ada13 Fixed action counts for border motion. 2017-03-26 18:33:05 -04:00
Thomas Harte
dfc468f220 Locked down all initial state. 2017-03-26 15:47:04 -04:00
Thomas Harte
e01f3f06c8 Completed curly bracket movement. 2017-03-26 14:34:47 -04:00
Thomas Harte
3229502fa1 Standardised curly bracket placement across the Atari. 2017-03-23 21:59:16 -04:00
Thomas Harte
a26b87f348 Fixed: mistake was failure to count ready cycles. 2017-03-20 20:44:03 -04:00
Thomas Harte
4c3cc42c91 This gives a very noisy version of the real audio. 2017-03-20 20:38:29 -04:00
Thomas Harte
f3f4e1a541 Made a first, hacky, attempt at audio. 2017-03-20 19:35:51 -04:00
Thomas Harte
4722f6b5c4 Fixed sprite disappearance: test should be applied predecrement, not post — it relates to the address being used this access, not the next one. 2017-03-19 18:58:35 -04:00
Thomas Harte
7d8d1c7828 Fixed 'random' number generator. 2017-03-19 18:54:35 -04:00
Thomas Harte
4bb70e7d31 Resetting the mask upon low byte write appears to resolve some issues. 2017-03-19 18:49:37 -04:00
Thomas Harte
321030bb44 Added a slightly faulty but seemingly 'close' version of masking. 2017-03-19 18:28:06 -04:00
Thomas Harte
6c161b1150 This gives something that might be the correct background. 2017-03-19 17:49:48 -04:00
Thomas Harte
d5c37c8619 Shushed a little, so as to be able to see a reasonable amount of output during my lifetime. 2017-03-19 17:38:54 -04:00
Thomas Harte
7c66c36d3f Attempted at least to manage appropriate data storage. 2017-03-19 17:31:08 -04:00
Thomas Harte
031a68000a Added a class to contain the Pitfall 2 pager and a skeleton of initial work. 2017-03-18 22:08:47 -04:00
Thomas Harte
c3d82f88a5 Tidied up and commented on the Activision stack implementation. 2017-03-18 21:01:58 -04:00
Thomas Harte
c033bad0b9 Here's MNetwork! 2017-03-18 20:51:49 -04:00
Thomas Harte
c31d85f820 Re-emplaced the MegaBoy. Also cut detritus from the main Atari header. 2017-03-18 19:02:34 -04:00
Thomas Harte
217fbf257e CBS RAM Plus returns. 2017-03-18 18:56:20 -04:00
Thomas Harte
0b611a14b9 Tigervision paging returns. 2017-03-18 18:50:13 -04:00
Thomas Harte
df6861c9dc Parker Bros paging is back. 2017-03-18 18:21:01 -04:00
Thomas Harte
a4cd12394e Reinstated the Activision stack pager. 2017-03-18 18:03:48 -04:00
Thomas Harte
e0bca1e37b Reinstated the 16 and 32 kb Atari pagers, and ensured the 6532 always starts in a valid state. 2017-03-18 17:34:34 -04:00
Thomas Harte
55ce851bb2 Fixed types of the 8k cartridges, ensured the 6502 starts without an IRQ request history. 2017-03-18 17:04:01 -04:00
Thomas Harte
e8d34f2eb4 Having farmed out the bus, the Atari itself no longer is/owns a 6502. 2017-03-18 16:34:41 -04:00
Thomas Harte
bb3daaa99b Sought to reintroduce the Atari 8k paging scheme, at the same time deciding to do away with the copy and paste of holding on to ROM data. 2017-03-18 15:04:01 -04:00
Thomas Harte
36b58d03b7 Formalised read bus value guarantee from the 6502, fixed missing clock signal wiring on the Atari cartridge class, reintroduced CommaVid support. 2017-03-18 14:46:46 -04:00
Thomas Harte
7958459db9 In theory unpaged cartridges should now work. Time to debug. 2017-03-18 14:01:04 -04:00
Thomas Harte
14a76af0d3 Started trying to float out bus control to cartridges. 2017-03-17 20:28:07 -04:00
Thomas Harte
afbd9fd41b Fixed declared line length. 2017-03-14 21:33:38 -04:00
Thomas Harte
7302703039 Implemented the Activision stack paging scheme. 2017-03-14 20:24:05 -04:00
Thomas Harte
97a8a96593 Rejigged how the memory map is handled and implemented MNetwork support. 2017-03-14 20:07:54 -04:00
Thomas Harte
3b29276228 Implemented the MegaBoy paging scheme. 2017-03-14 17:40:01 -04:00
Thomas Harte
b3632a4e86 Institutes CBS RAM Plus emulation. 2017-03-14 17:25:10 -04:00
Thomas Harte
f0d944847b Fixed setting of the second 1kb. 2017-03-11 18:16:29 -05:00
Thomas Harte
add14fb43a Made an attempt to implement Tigervision paging. 2017-03-11 17:44:35 -05:00
Thomas Harte
33bda2d40c Switched to image inspection for RAM guesses rather than disassembly. Which fixes the other Parker Bros titles. 2017-03-11 13:04:23 -05:00
Thomas Harte
2b5e3a600e Made a first attempt at implementing the Parker Bros pager within the emulation. 2017-03-11 12:43:12 -05:00
Thomas Harte
9c72ce5bd2 Ensured a settling delay is permitted before an NTSC/PAL decision is made. To avoid false switches just due to startup. 2017-03-06 19:37:35 -05:00
Thomas Harte
79784a8e57 Followed tip: missiles are locked to the position after four output pixels, not four input pixels. 2017-03-04 22:23:50 -05:00
Thomas Harte
4751615623 Fixed NTSC colour cycle count, and hence the 2600's reported line lengths and phase offset. 2017-03-04 17:31:39 -05:00
Thomas Harte
d3257c345a Tested against public ROMs and corrected. Also moved the deferred adjustment into a more canonical place. 2017-03-04 17:00:28 -05:00
Thomas Harte
837cccdf83 Switched to deferred updates for the 6532. 2017-03-04 14:58:28 -05:00
Thomas Harte
93d1573481 Added a fix for certain homebrews. 2017-03-01 07:59:25 -05:00
Thomas Harte
893a5dd007 Added an artificial low pass filter, attempting to capture post-digital effects. 2017-02-28 21:29:55 -05:00