824 Commits

Author	SHA1	Message	Date
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