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1521 Commits

Author SHA1 Message Date
Thomas Harte
8a699b6072 Kills setup_output definitively, saving some indirection. set_scan_target takes its place. 2018-11-14 21:52:57 -05:00
Thomas Harte
6d277fecd5 Makes ScanTarget a little more communicative and orthogonal. 2018-11-10 19:52:57 -05:00
Thomas Harte
55da1e9c0f Simplifies semantics a little and starts accepting a single buffer of pixel data. 2018-11-06 22:23:38 -05:00
Thomas Harte
014da41471 Ensures scan positions are communicated with a specified range, and switches manner of pixel clock communication. 2018-11-04 21:06:25 -05:00
Thomas Harte
f6562de325 Possibly adds enough for the Electron and ZX80 to start outputting dummy lines. 
Let's see!
 2018-11-03 23:40:39 -04:00
Thomas Harte
b40211d2c0 Starts to bend 'CRTMachine' to a world farther from owning the GPU relationship. 2018-11-03 21:54:25 -04:00
Thomas Harte
da4d883321 Adds first, incomplete attempts to talk to a ScanTarget from the CRT. 
Does away with the hassle of `unsigned` while I'm here; that was a schoolboy error.
 2018-11-03 19:58:44 -04:00
Thomas Harte
d1fc39d6e5 Attempts to carry on even if no BIOS is found. 2018-10-26 21:19:16 -04:00
Thomas Harte
a8645f80bf Introduces 'non-exclusive' emulator-space keyboards. 
i.e. sets of keys that don't amount to an entire keyboard in the modern sense. Experimentally used by the Master System for its reset key.
 2018-10-24 21:59:30 -04:00
Thomas Harte
e3fd63b2d7 Adds composite/RGB selection for the Master System. 2018-10-23 22:30:24 -04:00
Thomas Harte
00e7958a97 Separates request for an SMS2 VDP from current graphics mode. 
Thereby fixes various minor segments of Codemasters games.
 2018-10-23 22:19:45 -04:00
Thomas Harte
0822c96ce0 Implements the proper row counter values for > 192 row modes. 2018-10-19 22:37:56 -04:00
Thomas Harte
f49718e94b Ensures Codemasters games have the proper initial state. 2018-10-19 22:10:14 -04:00
Thomas Harte
6fff514901 Honours the region by implementing Japanese (no BIOS) and European (PAL) paths. 2018-10-19 21:37:05 -04:00
Thomas Harte
c365cca38a Makes order of operations explicit. 2018-10-18 22:37:04 -04:00
Thomas Harte
10d9cbdeb1 Adds an extra LOG to track the memory map as a potential cause of emulation failure. 2018-10-18 21:48:37 -04:00
Thomas Harte
57f03e660c Ensures console output only in debug builds. 2018-10-18 21:16:56 -04:00
Thomas Harte
6a2db52adb Ensures safe Megacart cartridge sizes too. 2018-10-18 21:09:05 -04:00
Thomas Harte
34e13d0d4d Clears top bit when reading the keypad and ensures no undefined behaviour reading the cartridge. 2018-10-18 21:05:58 -04:00
Thomas Harte
0278d5b61c Restores SG1000 compatibility. 2018-10-18 19:13:15 -04:00
Thomas Harte
52e02db5c8 Introduces horizontal counter latching and reading. 
Then makes a new guess at frame IRQ position. But gets it wrong. Hmmm.
 2018-10-11 19:56:32 -04:00
Thomas Harte
24644f1dd1 Adds a low-pass filter, picked entirely by ear, and switches to composite output, at least for now. 2018-10-07 18:39:03 -04:00
Thomas Harte
76f3b9f6ba Fixed: paging writes don't obstruct RAM. 2018-10-06 14:26:00 -04:00
Thomas Harte
7830cda912 Implements line querying and most of line interrupts. 2018-10-04 22:50:35 -04:00
Thomas Harte
e9328d819e Switches to RGB output, at least for development. 2018-09-30 20:47:03 -04:00
Thomas Harte
2e4c4c3e91 Makes some attempt to implement paging. 
This causes several of the 32kb games to be recognised by the BIOS and permitted to start, so it really really may be time to stop deferring work on the VDP.
 2018-09-24 21:34:42 -04:00
Thomas Harte
7515fa8a98 Ensures the SG1000 gets an unadulterated TMS and SN. 2018-09-23 22:24:29 -04:00
Thomas Harte
5b9e7213dd Adds a couple of joystick inputs. 
SG1000 titles all seem to work now.
 2018-09-23 21:55:07 -04:00
Thomas Harte
2253341904 This now goes far enough for the only SG1000 game I'm testing to start up. 
Which hopefully gives me as much as I need to implement joypads, etc, and definitively get to just the VDP being outstanding.
 2018-09-23 17:42:42 -04:00
Thomas Harte
e155dc8d6e Adds fairly standard memory map indirection. 2018-09-23 17:36:30 -04:00
Thomas Harte
00b2db4fb9 Ensures the Master System is informed when it should pretend to be an SG1000. 2018-09-23 16:34:47 -04:00
Thomas Harte
f59386f523 Adds just enough input logic that the Sega sound now plays. 2018-09-23 16:05:37 -04:00
Thomas Harte
38a1fde3bf Attempts to permit Master System interrupts. 2018-09-23 00:07:46 -04:00
Thomas Harte
40c7a63fb5 Makes a first attempt at Master System IO decoding. 2018-09-22 23:45:29 -04:00
Thomas Harte
d9e65cd758 Ensures neither the ColecoVision nor the MSX processes mid-cycles. 2018-09-21 22:53:35 -04:00
Thomas Harte
e511261b04 Adds a Master System class, so that SMSs can end up somewhere. 2018-09-21 22:13:07 -04:00
Thomas Harte
0d01346ad4 Advertises SMS support and goes as far as realising it needs to spawn a Master System. 2018-09-20 22:04:28 -04:00
Thomas Harte
e7f4babf41 Starts taking steps towards SMS/GG and V9938/9958 support. 
Specifically: routine namespace stuff, plus the intention to move to a table-based operation+cost version of timing. Reordering works fine for the TMS, and probably would also for the SMS/GG, but it'd be problematic with the command engine of the V9938/9958 and maintaining a consistent set of code is easier.
 2018-09-17 22:59:16 -04:00
Thomas Harte
a8b116e217 Turns down the Apple II brightness a little. 
So that light blue is more like a blue.
 2018-09-17 20:08:20 -04:00
Thomas Harte
868cd5cb09 Improves alignment request. 2018-09-12 20:27:02 -04:00
Thomas Harte
dec18d9acc Restores full pixel output to the Electron. 2018-09-12 20:25:30 -04:00
Thomas Harte
a7508bc2ae Switching explicitly to one pixel per sample eliminates the need for a bookender. 2018-09-12 20:11:17 -04:00
Thomas Harte
a38639d099 Eliminates the concept of an iCoordinate. 
Real-life precision appears not to support the idea of sub-sample pixel storage.
 2018-09-12 20:05:39 -04:00
Thomas Harte
c6e94bc2a6 Adds missing #include. 2018-09-11 21:55:03 -04:00
Thomas Harte
09dafb1a79 Simplifies and corrects MSX pasting behaviour. 
Now including mapping \n -> \r.
 2018-09-11 21:46:28 -04:00
Thomas Harte
36ff2105fb Updates C-style (bool) casts. 2018-09-11 20:37:15 -04:00
Thomas Harte
5445081c96 It's eight pixels that aren't written in double output mode, not four. 2018-09-10 21:38:05 -04:00
Thomas Harte
6e9cd5cb21 Resolves over-brightness created by over-composition. 2018-09-09 20:30:43 -04:00
Thomas Harte
8d79a1e381 Corrected fat low-res implementation. 
As per comment of awanderin that "the odd addresses don't get their pixels auto-shifted by the hardware as with normal lo-res".
 2018-09-09 10:06:21 -04:00
Thomas Harte
d70f5da94e Attempts an implementation of the undocumented low res + annunciator 3 graphics mode. 2018-09-08 20:51:15 -04:00
Thomas Harte
afeec09902 Gets explicit about DHIRES being annunciator 3; implements four-colour high res mode. 2018-09-06 23:23:19 -04:00
Thomas Harte
0526ac2ee2 Slightly increases const correctness. 
The converters from source data to output pixels do not modify the source data. It's a shame there's no `restrict` in C++.
 2018-09-05 11:36:40 -04:00
Thomas Harte
8b661fb90f Introduces an extra level of indirection for text mapping. 2018-09-05 10:26:08 -04:00
Thomas Harte
dab7d3db1b Merge branch 'master' into 40ColumnTextCorruption 2018-08-30 20:24:47 -04:00
Thomas Harte
d53b38ec7e Correction: 0xc011 et al get the keyboard value in bits 0 to 6 and the switch value in bit 7. 2018-08-30 20:18:36 -04:00
Thomas Harte
2e04c4442c Adds mirrors for keyboard input and the audio toggle. 2018-08-27 21:14:21 -04:00
Thomas Harte
0599d9602e Ensures no out-of-bounds accesses to inverses on a IIe. 2018-08-26 23:02:31 -04:00
Thomas Harte
234bef2a88 Adds default to make it explicit that fetch_address is initialised. 2018-08-24 22:26:03 -04:00
Thomas Harte
1f491e764e Nudges visible area slightly to the right. 2018-08-24 22:08:11 -04:00
Thomas Harte
114a43a662 Corrects improper indexing for byte shift. 2018-08-24 21:58:43 -04:00
Thomas Harte
97a89aaf4d Factors out the stuff of deferred action interleaving, as I suspect it'll come in handy. 2018-08-24 20:04:26 -04:00
Thomas Harte
61e46399dc About face! There should be no delay on serialisation, but a delay on interpretation-affecting soft switches. 2018-08-22 21:56:45 -04:00
Thomas Harte
e802f6ecc2 Rearranges draw loop around a fixed-size 568-sample line buffer. 2018-08-19 22:31:04 -04:00
Thomas Harte
4209f0e044 Moves memory collection into a separate loop. 2018-08-18 21:54:24 -04:00
Thomas Harte
33576aa2c4 Uses const to ensure output_* are properly constrained. 2018-08-18 21:36:48 -04:00
Thomas Harte
17bf1a64bf Moves the stuff of generating pixels out of the main loop. 2018-08-18 18:44:31 -04:00
Thomas Harte
f8d46f8f3d Merge branch 'master' into AppleDelay 2018-08-18 14:11:21 -04:00
Thomas Harte
be01203cc1 Starts to expand the range of supported 6502s. 
This fully implements the NES 6502 because, well, it's virtually no extra work, and ensures that RDY takes effect on write cycles on 65C02s.
 2018-08-13 22:17:22 -04:00
Thomas Harte
4d1d19a464 Introduces an intermediate buffer for Apple II video data. 2018-08-12 20:36:08 -04:00
Thomas Harte
cb47575860 Eliminates stdout chatter. 2018-08-11 22:57:54 -04:00
Thomas Harte
434d184503 Corrects deserialisation order in double low res mode. 2018-08-11 22:53:06 -04:00
Thomas Harte
7374c665e8 Corrects regression in video flushing. 2018-08-11 19:57:39 -04:00
Thomas Harte
60ab6f0c2a Entrusts IIe-esque character logic fully to the ROM. 2018-08-11 18:45:39 -04:00
Thomas Harte
a13eb351da Implements the Enhanced IIe, other than some text selection errors. 2018-08-11 10:26:30 -04:00
Thomas Harte
76a73c835c Forces 6502 consumers to declare which model — the original, 65C02 or 65SC02. 
All present machines use a regular 6502.
 2018-08-06 20:06:07 -04:00
Thomas Harte
de68e70246 Fixes various IIe video deficiencies. 
Specifically:
* the double-high resolution switches should be read/write; and
* the other IIe-specific switches should cause a video update for real-time effect.
 2018-08-05 17:47:23 -04:00
Thomas Harte
ce14cc8677 Flips meaning of analogue input bits, correcting most joystick titles. 
Mysteriously, some functioned correctly before this. But they continue to do so.
 2018-08-05 17:36:01 -04:00
Thomas Harte
55f2fccf5e Extends correct text handling to 80-column mode. 2018-08-04 22:25:29 -04:00
Thomas Harte
26624d7652 Fixes vertical blank signal; it should be the other way around. 2018-08-04 20:57:02 -04:00
Thomas Harte
85fb4773b0 Tweaks Apple key mapping and implements reset_all_keys. 2018-08-04 20:31:37 -04:00
Thomas Harte
099d66804e Makes colour burst phase explicit. 2018-08-04 19:29:34 -04:00
Thomas Harte
086596c28e Adds reading of vertical blank and implements the full IIe keyboard logic. 
i.e. there are now two Apple keys, and shift isn't assumed.
 2018-08-04 19:17:04 -04:00
Thomas Harte
3aeb4213fe Implements the C010 read value. 2018-08-04 17:57:02 -04:00
Thomas Harte
558b96bc05 Corrects IIe text display. 2018-08-04 16:52:29 -04:00
Thomas Harte
e97cc40a2c Corrects typo in Cx-page ROM paging. 2018-08-04 12:44:58 -04:00
Thomas Harte
c4f86cc324 The Disk II now being its proper speed, withdraws the quickload option. 2018-08-03 21:20:21 -04:00
Thomas Harte
74a2f717b3 Turns down the composite signal amplitude a little, to help colour distinctness. 2018-08-01 18:52:42 -04:00
Thomas Harte
c91eaaf8da Takes a stab at double low-res graphics. 2018-07-31 21:45:09 -04:00
Thomas Harte
a36f37d240 Introduces a 1/14th delay in output of double high res. 2018-07-31 21:29:51 -04:00
Thomas Harte
c773d3501a Implements the INTC8ROM switch. 
Finally causing the Zellyn tests to pass! Is this nightmare behind me?
 2018-07-31 19:00:46 -04:00
Thomas Harte
5810f9b3f9 Fixes high resolution address range and switching logic. 2018-07-30 23:23:18 -04:00
Thomas Harte
3f56683342 Fixes order of deserialisation between auxiliary and base RAM. 2018-07-30 23:08:45 -04:00
Thomas Harte
16ccbdefd6 Of course, | has higher precedence than ?. Classic! 2018-07-30 23:08:22 -04:00
Thomas Harte
e9aaa5bbdf Factors out the page-mapping function. 
For one less potential source of failure.
 2018-07-30 22:23:48 -04:00
Thomas Harte
ecb26e3281 Corrections: slot_C3_rom_ works the other way around; 80STORE doesn't affect most of RAM but does always affect the text screen. 
Also factored out `set_zero_page_paging` for consistency.
 2018-07-30 19:54:25 -04:00
Thomas Harte
5aa0b17720 Improves IIe paging further. 2018-07-29 23:02:27 -04:00
Thomas Harte
632b37ecec Attempts an implementation of auxiliary memory. 2018-07-29 10:41:12 -04:00
Thomas Harte
c905de2e40 Restores IIe ROM-over-card paging. 2018-07-28 13:31:25 -04:00
Thomas Harte
bc2afe69e1 Accepting that memory mapping on a IIe is more complicated than I anticiapted, introduces mapping for all pages. 
Also picks a name for the Unenhanced Apple IIe ROM.
 2018-07-28 13:02:49 -04:00
Thomas Harte
894998b163 Merge branch 'master' into IIe 2018-07-28 10:54:04 -04:00
Thomas Harte
3c33ccd730 Eliminates various blank lines. 2018-07-28 10:52:34 -04:00
Thomas Harte
5f2b9b2d5a Implements the alternative zero page soft switch. 2018-07-25 22:10:21 -04:00
Thomas Harte
5c4506a9db Talks the IIe into proceeding to a beep and an improperly-formed logo. 2018-07-25 21:43:12 -04:00
Thomas Harte
55a6431fb3 Puts in enough logic to be able to launch a non-functional IIe. 2018-07-25 18:58:34 -04:00
Thomas Harte
ede2696a77 Edges further towards implementing the IIe video subsystem. 
All video-specific switches are in place, and mostly honoured, and a IIe machine configuration is advertised at least.
 2018-07-24 22:15:42 -04:00
Thomas Harte
59b9e39022 Starts the process of supporting the Apple IIe graphics modes. 
Albeit that I'm not yet even up on the proper soft switches.
 2018-07-23 22:14:41 -04:00
Thomas Harte
e339d169c5 Ensures the joystick doesn't obstruct tape input. 2018-07-12 22:10:05 -04:00
Thomas Harte
58484e8f37 Adds joystick support for the MSX. 2018-07-12 21:42:47 -04:00
Thomas Harte
8503589828 Corrects failure to retain OS. 2018-07-10 22:05:50 -04:00
Thomas Harte
efd812cf22 Ensures no buffer overrun when installing the OS ROM. 2018-07-10 21:54:36 -04:00
Thomas Harte
57f161e64c Corrects documentation of the media target. 2018-07-10 21:42:09 -04:00
Thomas Harte
0897210969 Neither cartridge machine should be a media target; their media can't be changed at runtime. 2018-07-10 21:40:13 -04:00
Thomas Harte
7e58a44771 Renames ConfigurationTarget to MediaTarget as per its newly-reduced interface. 2018-07-10 21:32:28 -04:00
Thomas Harte
3862fdb44c Simplifies initialisation procedure for all machines. 
With the side effect of allowing every machine to try to load only the ROMs that it needs.
 2018-07-10 20:00:46 -04:00
Thomas Harte
c97c5fa03a [Re-]recalibrates CRT retrace period and affected view windows. 
In the hope of moving the CPC closer to the real CTM visible area.
 2018-07-05 22:07:18 -04:00
Thomas Harte
640a84d456 Shift the h-within-v pulse to eliminate a curved top line. 2018-06-24 11:27:18 -04:00
Thomas Harte
04f6cb1750 Merge branch 'master' into AppleIIEqualisation 2018-06-23 23:10:29 -04:00
Thomas Harte
a93f8103ad Zooms out the CPC a little more. 
To fix the maximum amount of content that I can, at least for now.
 2018-06-23 22:15:34 -04:00
Thomas Harte
55ab305dbf Introduces equalisation pulses for the Apple II. 2018-06-23 22:11:39 -04:00
Thomas Harte
52c9f9e89e Merge branch 'master' into CPCJoysticks 2018-06-23 16:43:49 -04:00
Thomas Harte
1c6af279b2 Picks more appropriate cropping now that I'm obeying HSYNC-as-blank. 2018-06-23 16:40:17 -04:00
Thomas Harte
9968342a11 Ensures the pixel collection test is inline with other decisions. 2018-06-23 16:18:33 -04:00
Thomas Harte
c248ecde48 Introduces joystick support for the CPC. 2018-06-21 22:46:10 -04:00
Thomas Harte
154c89e041 Introduces a missing separator. 2018-06-21 20:01:04 -04:00
Thomas Harte
d45f1a793d Introduces composite/RGB selection for the Amstrad CPC. 2018-06-21 20:00:49 -04:00
Thomas Harte
1f8b69a5b0 Attempts to honour the full CRTC 'sync' period, placing blank and the colour burst. 2018-06-20 22:38:54 -04:00
Thomas Harte
acb74185d5 Revokes test logging. 2018-06-19 19:39:09 -04:00
Thomas Harte
1bdc718527 Ensures the MSX reports the proper number of drives. 2018-06-18 22:15:52 -04:00
Thomas Harte
685a80f95b Ensures the Electron Plus 3 properly announces drives to an activity observer. 
Does away with lazy allocation as not all that helpful, and liable to cause complexity.
 2018-06-18 21:49:57 -04:00
Thomas Harte
6a3702a5c7 Reduces space for floating point accuracy errors. 2018-06-16 22:22:40 -04:00
Thomas Harte
7728adfc5a Eliminates repetition of the 10 constant. 2018-06-14 17:23:47 -04:00
Thomas Harte
51da21b844 Formally introduces keyboard-as-joystick for the Mac, and fixes discovered joystick issues. 
Specifically:
* digital to analogue conversion not returning to centre;
* Apple II axes being the wrong way around; and
* Apple II buttons using improper selection logic.
 2018-06-13 19:22:34 -04:00
Thomas Harte
0be19d8de7 Ensures analogue channels which are already charging don't abide by c070. 2018-06-13 18:16:02 -04:00
Thomas Harte
f26e4734b3 Adds use of joystick input in the Apple II. 2018-06-12 22:21:43 -04:00
Thomas Harte
f1b430338e Makes the Apple II a joystick machine. 
Albeit that the values supplied to its joysticks do not currently make it into the emulated state.
 2018-06-11 22:16:32 -04:00
Thomas Harte
2954373115 Introduces an intermediary for digital <-> analogue conversion. 2018-06-11 21:35:03 -04:00
Thomas Harte
42d21ea3a9 Merge branch 'master' into Joystick 2018-06-10 21:08:59 -04:00
Thomas Harte
7d761f145f Corrects typo that mapped Apple II options to the Electron. 2018-06-10 21:05:14 -04:00
Thomas Harte
3ea2a4ccb8 Moves the joystick class towards accepting analogue inputs. 2018-06-10 20:45:52 -04:00
Thomas Harte
69da00fcfb Modifies test slightly for usual RWTS16 location. 
Also eliminates messy print logging.
 2018-06-10 18:41:09 -04:00
Thomas Harte
d576ff1172 Exposes DOS 3.3 acceleration as an option. 
Albeit with an unhelpful label in the macOS GUI for now.
 2018-06-10 18:28:29 -04:00
Thomas Harte
af54666c23 Implements RWTS acceleration. 2018-06-10 17:58:16 -04:00
Thomas Harte
12c59ede09 Adds writeback of track location. 2018-06-09 20:34:12 -04:00
Thomas Harte
b4d0d4fff6 Starts building out some fast-loading infrastructure for DOS 3.3. 2018-06-09 17:29:14 -04:00
Thomas Harte
dde9b73a22 Creates the through-path that will be necessary for RWTS acceleration. 2018-06-09 12:51:53 -04:00
Thomas Harte
fb4bb21bf6 Ensures an objective copy of the bus address is kept, and forwarded to cards. 2018-06-08 20:12:15 -04:00
Thomas Harte
d380595ad4 Unrolls the loops for slightly fewer conditionals. 2018-06-03 07:27:03 -04:00
Thomas Harte
d84b8700a3 Switches the Apple II to one byte per pixel. 
Just trying to get it right for now; optimisation to come.
 2018-06-02 22:03:45 -04:00
Thomas Harte
80b281d9f1 Switches back to whole bytes per pixel, owing to persistent precision problems at 1bpp. 
Also fixes the inaccurately-named `cycles_since_update_`.
 2018-06-02 18:25:00 -04:00
Thomas Harte
69dc3cc4d8 Switches to using the same varying for byte and subpixel selection. 2018-06-01 22:52:29 -04:00
Thomas Harte
0833412df9 Corrects port for ZON-X reads. 2018-06-01 19:45:37 -04:00
Thomas Harte
35e84ff1a8 Corrects NTSC quadrature phase. 2018-05-31 21:40:46 -04:00
Thomas Harte
8dd7c6ef23 Eliminates 'reversed_c' as I no longer believe low-resolution colour numbers are reversed. 
Also gets explicit about phase.
 2018-05-29 22:30:45 -04:00
Thomas Harte
b2464598d0 Forces the Apple II bus handler call inline. 2018-05-28 18:21:01 -04:00
Thomas Harte
6812a001d8 Teaches the Oric to apply a lighter Disk II touch when possible. 2018-05-28 18:20:43 -04:00
Thomas Harte
928aab13dc Introduces more granular clocking announcements to the Disk II. 
As well as making it accept the clock rate it'll actually receive, to supply to the drives, so that they spin at the proper speed.
 2018-05-28 17:19:29 -04:00
Thomas Harte
f3fe711542 Attempts to reduce FDC costs. 2018-05-27 23:55:04 -04:00
Thomas Harte
db8d8d8404 Commutes Sleeper to ClockingHint::Source, making state more granular. 2018-05-27 23:17:06 -04:00
Thomas Harte
7c3dd55e5c Corrects typo and improves exposition. 2018-05-24 18:57:35 -04:00
Thomas Harte
1b43381be0 Corrects meaning of the Microdisc's paging control. 2018-05-24 18:53:02 -04:00
Thomas Harte
a4d7703efd Adds missing #include. 2018-05-23 22:28:00 -04:00
Thomas Harte
f9c25372c2 Ensures cards get messaged regardless of memory area. 2018-05-22 21:49:34 -04:00
Thomas Harte
ea92363e6c Attempts to get the Apple II to honour the AppleII::Card select constraints appropriately. 2018-05-22 20:34:59 -04:00
Thomas Harte
015f692bd3 The Disk II card now commutes Disk II sleep activity to select constraints. 2018-05-22 19:51:39 -04:00
Thomas Harte
80d34f5511 Specs out a new AppleII::Card interface. 
Doesn't yet fully implement it on the Apple II side though.
 2018-05-21 20:54:53 -04:00
Thomas Harte
e482929da8 Enhances the Disk II's ability to sleep. 
Also enables Disk II sleep observation in the Oric.
 2018-05-19 23:15:28 -04:00
Thomas Harte
7b7beb13a3 Eliminates the fiction of setting and getting registers. 
The Disk II seems lower level than that; it will read the data bus whenever it likes, it is the programmer's responsibility to keep up with that. It also reserves the right not to load the bus regardless of whether it receives a read or write access.
 2018-05-17 21:39:11 -04:00
Thomas Harte
b3f4d0ed8c Imposes a three-cycle penalty for SN76489 access. 
This is my reading of (i) the SN76489 data sheet; plus (ii) the ColecoVision schematic.
 2018-05-16 19:06:03 -04:00
Thomas Harte
7c2721d54d Adjusted number again. But we'll see. 2018-05-15 20:43:13 -04:00
Thomas Harte
8907d0a9a7 Adds a low-pass filter to the Apple II's audio. 2018-05-14 21:56:14 -04:00
Thomas Harte
5107c7c23d Ensures all keypresses are entered as upper case. 2018-05-13 22:40:28 -04:00
Thomas Harte
4dbd1f1358 Corrects Disk II ROM visibility. 2018-05-13 22:36:02 -04:00
Thomas Harte
dea9892a85 Attempts to implement vapour lock bus behaviour. 2018-05-13 18:53:32 -04:00
Thomas Harte
7226d8d4f7 Eliminates all instances of µ. 2018-05-13 15:46:14 -04:00
Thomas Harte
ad9b0cd4e3 Eliminates all endashes. 2018-05-13 15:43:03 -04:00
Thomas Harte
5d6b5d9f10 Eliminates all emdashes in cross-platform code. 2018-05-13 15:34:31 -04:00
Thomas Harte
0b771ce61a Removes all instances of the copyright symbol. 2018-05-13 15:19:52 -04:00
Thomas Harte
2252c29495 Switches the Oric to string insertion at the time of consumption. 
To avoid issues around keyboard scanning being decoupled from consumption via IRQ, but not buffered. Keys pressed while BASIC is otherwise busy are just lost.
 2018-05-13 14:02:46 -04:00
Thomas Harte
39c0bc6c47 Factors string serialisation with \n\r conversion out of the Apple II and reuses it with the Oric. 2018-05-13 13:57:19 -04:00
Thomas Harte
a6b8e88406 Implements type_string for the Apple II. 2018-05-13 11:30:04 -04:00
Thomas Harte
d0fd4dd4db The MSX is now an activity source. 
Completing the set.
 2018-05-12 17:32:53 -04:00
Thomas Harte
3ba6b6f1ee Makes the Oric an event source. 2018-05-11 23:05:36 -04:00
Thomas Harte
bc464e247f The 1540 and, by extension, the Vic-20 are now activity sources. 2018-05-11 22:24:33 -04:00
Thomas Harte
c23f6d8d19 Corrects type for array accesses. 2018-05-11 21:46:30 -04:00
Thomas Harte
39d779edf0 Makes CPC an activity source. 2018-05-11 21:45:46 -04:00
Thomas Harte
a43ca0db35 Makes the Apple II an activity source. 2018-05-10 22:17:13 -04:00
Thomas Harte
ef19a03efc Drives can now deliver activity events. 2018-05-10 21:54:10 -04:00
Thomas Harte
85e1610627 Merge branch 'master' into ActivityReceiver 2018-05-10 20:49:32 -04:00
Thomas Harte
d16ae84d0b Reduces number of Apple II video flushes, to reduce processing cost. 2018-05-10 20:48:57 -04:00
Thomas Harte
95f859cf5c Merge branch 'master' into ActivityReceiver 2018-05-10 20:26:50 -04:00
Thomas Harte
312171fa59 Pulls out a couple of repeating constants. 2018-05-09 20:28:25 -04:00
Thomas Harte
c3a2f7717b Makes attempt to implement support for the Pravetz 8D + 8DOS. 
i.e. the Disk II wired up to the Oric, with some ROM swaps.
 2018-05-08 22:05:43 -04:00
Thomas Harte
70e6c3b2f6 Introduces the ActivityObserver protocol for LEDs, drive events, etc. 
The Electron's caps lock LED is the test case.
 2018-05-07 21:57:54 -04:00
Thomas Harte
f65c65569a Makes disk head position explicitly something with sub-integral precision. 
Also as a drive-by fix, corrects accidental assumption of 10 sectors for all MFMSectorDump descendants.
 2018-05-06 23:17:36 -04:00
Thomas Harte
d613c3c187 Adds an implementation of the language card. 2018-05-06 16:17:11 -04:00
Thomas Harte
4c4ab25d0e Attempts to rationalise Apple II address decoding. 2018-05-05 20:24:03 -04:00
Thomas Harte
723ee88043 Introduces configuration options for the Apple II. 
Specifically: II or II+? Disk II 13- or 16-sector? Or not at all?
 2018-05-03 19:37:32 -04:00
Thomas Harte
eecea93b3b Simplifies the test for resetting the ZX80/81 line counter. 2018-05-01 21:31:37 -04:00
Thomas Harte
f4097290c2 Made various corrections following a quick for-loop constness audit. 2018-04-30 22:23:57 -04:00
Thomas Harte
265bc80d44 Attempts to introduce sleeping to the Disk II. 2018-04-29 17:52:29 -04:00