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2334 Commits

Author SHA1 Message Date
Thomas Harte
0ac11fc39e Add floating bus. 2021-03-23 17:09:42 -04:00
Thomas Harte
3d0503a35e Adds a genuine Spectrum mapping, tweaks timing. 2021-03-23 16:59:43 -04:00
Thomas Harte
ad8cb52f11 Improves const correctness. 2021-03-23 16:59:26 -04:00
Thomas Harte
496a294c71 Adds clocking observers for the tape and FDC. 2021-03-23 16:38:04 -04:00
Thomas Harte
465c74ab86 Adds the Spectrum side of typing. 
The character mapper itself needs some Spectrum logic.
 2021-03-23 10:44:43 -04:00
Thomas Harte
4e8f82a39c Adds ZX Spectrum activity indicators. 2021-03-23 10:32:22 -04:00
Thomas Harte
d0776b58cf Tweaks timing empirically. 2021-03-22 23:20:49 -04:00
Thomas Harte
6da099d7e1 Ensures the enter key is cleared before fast-loading tapes have loaded. 2021-03-22 22:42:10 -04:00
Thomas Harte
60e77785e8 Makes an attempt to provide the necessary hook for floating bus behaviour. 2021-03-22 22:34:28 -04:00
Thomas Harte
19cd6a55d3 Rejigs the way video is counted to orient it around fetch times. 2021-03-22 22:18:38 -04:00
Thomas Harte
08432dd94b Adds automatic media starts. 2021-03-22 20:12:03 -04:00
Thomas Harte
3c1131a84b Attempts to implement the +3. 2021-03-22 19:36:05 -04:00
Thomas Harte
c0abdf1b86 Factors out the CPC's simple FDC adaptor. 2021-03-22 19:12:10 -04:00
Thomas Harte
3ef2715eee Implements the ROM version of fast loading. 2021-03-22 19:04:38 -04:00
Thomas Harte
4a12d7086d Makes another guess at total colour phase. 2021-03-22 17:24:38 -04:00
Thomas Harte
a6b75b8637 Attempts improvements to video fetch timing. Alas, a lot of guess work here. 2021-03-22 15:59:03 -04:00
Thomas Harte
bdb3bce8d6 Corrects semantics on contended-timing calculation. 2021-03-22 15:48:51 -04:00
Thomas Harte
a26716919c Switches to an is-in-video test that allows for video memory being paged twice. 
This is trivially possible even in plain 128kb mode.
 2021-03-22 15:46:02 -04:00
Thomas Harte
8dbc7649aa Adds note-to-self re: FDC. 2021-03-22 09:15:00 -04:00
Thomas Harte
42a9dc7c2b Minimises video flushing, moves it to the proper time. 2021-03-22 09:02:49 -04:00
Thomas Harte
7965772745 Moves contention delays up to the time of MREQ going active. 2021-03-21 23:04:20 -04:00
Thomas Harte
f37f89a7d3 Merge branch 'master' into ZXSpectrum 2021-03-21 22:44:37 -04:00
Thomas Harte
d987e5a9d7
Merge pull request #887 from TomHarte/ZX80Wait 
Ensures no signalling to wait by a ZX80, ever.
 2021-03-21 22:44:11 -04:00
Thomas Harte
c097ed348a Ensures no signalling to wait by a ZX80, ever. 2021-03-21 22:38:50 -04:00
Thomas Harte
0f9ab53ea0 Resolves GCC warnings from dangling Apple IIgs work. 2021-03-21 22:36:18 -04:00
Thomas Harte
dd7419282d Resolves GCC warnings from dangling Apple IIgs work. 2021-03-21 22:25:14 -04:00
Thomas Harte
7562917740 Adds the Spectrum to the macOS New... menu. 2021-03-21 21:50:50 -04:00
Thomas Harte
3925eee575 Attempts more relaxed decoding of AY accesses. 2021-03-21 21:03:35 -04:00
Thomas Harte
6482303063 Reduces code duplication slightly. 2021-03-21 20:34:58 -04:00
Thomas Harte
9ce1dbaebb Switches to partial decoding for paging registers; permits video address changes after paging is locked. 2021-03-21 20:23:00 -04:00
Thomas Harte
064667c0c3 Corrects asymmetrical flash, ensures consistent burst phase. 2021-03-21 20:22:27 -04:00
Thomas Harte
58be770eaa Factors out some boilerplate. 
When I'm confident this is correct, I can fix up the other call sites.
 2021-03-21 00:14:48 -04:00
Thomas Harte
1b0f45649e Improves contended timing. 
Still not quite on the money, but this was an overt bug.
 2021-03-21 00:00:18 -04:00
Thomas Harte
42bfabbe8c The implication seems to be of a fixed phase swing. 
I'm enquiring further.
 2021-03-20 23:46:13 -04:00
Thomas Harte
07a63d62dd Adds some quick arithmetic on the clock speed. 2021-03-20 11:19:44 -04:00
Thomas Harte
26911a16e8 Lengthens sync, better to conform to PAL; experiments with fixed-phase colour burst. 
I need to get hold of real documentation here.
 2021-03-20 10:38:21 -04:00
Thomas Harte
cf9a5d595b Completes piping of audio. 2021-03-19 23:33:46 -04:00
Thomas Harte
7729f1f3d0 Attempts automatic Spectrum tape control. 2021-03-19 22:43:48 -04:00
Thomas Harte
7d59ff6d8f Builds in a colour burst, producing colour composite. 2021-03-19 22:25:37 -04:00
Thomas Harte
2ee478b4c4 Goes some way towards wiring up Spectrum options. 2021-03-19 22:17:20 -04:00
Thomas Harte
bb0d35e3d0 Minor formatting/layout fixes. 2021-03-19 22:17:03 -04:00
Thomas Harte
a482ce1546 Adds a tape player. 2021-03-19 11:12:50 -04:00
Thomas Harte
a35e1f4fbe Starts to make formal Spectrum accommodations. 2021-03-19 11:06:09 -04:00
Thomas Harte
2371048ad1 Formally separates keyboard code. 
With an eye to formalising the Spectrum/ZX81/ZX80 differences.
 2021-03-19 10:36:08 -04:00
Thomas Harte
93b9ea67e6 Takes a run at contended timings. 2021-03-19 08:49:56 -04:00
Thomas Harte
f8c9ef2950 Add necessary header for memset. 2021-03-19 00:00:59 -04:00
Thomas Harte
87fac15cc4 This is going to remain purely a template; no .cpp. 2021-03-18 23:51:45 -04:00
Thomas Harte
2d51924a3c Wires up Spectrum keyboard. 
The machine now appears to be fully interactive and functional. Timing and media aside, that is.
 2021-03-18 23:51:21 -04:00
Thomas Harte
c3d96b30d7 Factors out a little of the ZX81's keyboard logic. 2021-03-18 23:45:57 -04:00
Thomas Harte
44240773ef Corrects address generation, ink/paper selection. 
Seemingly to give a correct +2a boot. Time to add a keyboard and find out, I guess.
 2021-03-18 23:30:48 -04:00
Thomas Harte
ed587a4db5 Provides a better no-port-here value. 2021-03-18 23:14:39 -04:00
Thomas Harte
020a04006e Adds flashing, randomises initial RAM contents. 2021-03-18 23:07:51 -04:00
Thomas Harte
622a8abf7f Takes a stab at pixel output. 2021-03-18 22:57:10 -04:00
Thomas Harte
871bac6c8a Marks out and approximately centres a pixel region. 2021-03-18 22:41:20 -04:00
Thomas Harte
fe3e8f87e7 Takes a shot at an all-border output. 2021-03-18 22:29:24 -04:00
Thomas Harte
87fc7c02e8 Provides a base pointer for video output. 2021-03-18 22:04:41 -04:00
Thomas Harte
f2620e6afb Adds a CRT. Not yet clocked. 2021-03-18 21:54:42 -04:00
Thomas Harte
ab2ad70885 Takes a run at interrupts. 2021-03-18 21:29:52 -04:00
Thomas Harte
135134acfd Adds a shell for video emulation. 2021-03-18 12:47:48 -04:00
Thomas Harte
5664e81d48 It appears the +2a and +3 have a different clock rate. 2021-03-18 12:41:24 -04:00
Thomas Harte
c353923557 This can be constexpr. 2021-03-18 12:40:59 -04:00
Thomas Harte
b830d62850 Adds quick notes on port FE. 2021-03-18 12:32:54 -04:00
Thomas Harte
17f551e89d Attempts a full audio wiring. 2021-03-18 12:23:54 -04:00
Thomas Harte
4a4da90d56 Implements some of the memory map, and instantiates audio objects. 2021-03-18 12:14:48 -04:00
Thomas Harte
404c1f06e6 Insert missing space. 2021-03-18 10:44:01 -04:00
Thomas Harte
730bfcd1fd Stumbles towards a memory map. 2021-03-18 10:43:51 -04:00
Thomas Harte
97249b0edd Slow walks further towards a functioning Spectrum. 2021-03-18 10:18:17 -04:00
Thomas Harte
5a1bda1d82 Performs boilerplate towards a ZX Spectrum class. 2021-03-17 23:38:55 -04:00
Thomas Harte
9bec91c2b9 Correct further namespace references. 2021-03-17 22:56:03 -04:00
Thomas Harte
3d1775d853 Correct namespace. 2021-03-17 22:52:23 -04:00
Thomas Harte
814c057570 Update further path references. 2021-03-17 22:46:25 -04:00
Thomas Harte
b63ca16ce2 Attempts to hatch a Sinclair namespace. 2021-03-17 22:40:29 -04:00
Thomas Harte
cdc19c6990 Adds TODO. 2021-03-15 11:39:15 -04:00
Thomas Harte
1a5dafae00 Slightly neatens. 2021-03-15 11:37:03 -04:00
Thomas Harte
d368dae94a Adds tape motor LED. 2021-03-12 23:09:51 -05:00
Thomas Harte
7d778bc328 Formally introduces fast tape support as an option. 
It doesn't feel that fast yet though.
 2021-03-12 22:57:02 -05:00
Thomas Harte
7a8317ad81 It seems a full CRC is in play. 2021-03-12 22:45:48 -05:00
Thomas Harte
a32a2f36be Advances to correctly reading bytes. 
Something is still amiss though. Maybe I'm supposed to update the checksum?
 2021-03-12 19:15:35 -05:00
Thomas Harte
cd215ef521 Stumbles towards supporting fast tape loading. 
Right now: in a non-optional manner.
 2021-03-12 18:42:17 -05:00
Thomas Harte
67408521cd Makes absolutely sure not to try to use quickboot workaround for Mac 128kb/512kb. 
Albeit that it should be harmless; it's just seeding RAM.
 2021-03-06 22:34:35 -05:00
Thomas Harte
f05260b839 ZX80/1: fix initial key state, wait line when NMI disabled. 2021-03-06 21:59:45 -05:00
Thomas Harte
7b164de6fd Reenables interrupts. 2021-03-06 18:53:39 -05:00
Thomas Harte
24e68166c6 Minor clean-ups of my temporary cruft. 2021-03-06 17:11:06 -05:00
Thomas Harte
b72474f418 Reduces debugging shout outs a touch. 2021-03-03 20:53:05 -05:00
Thomas Harte
38046d49aa Increases debugging noise. 2021-03-03 20:52:14 -05:00
Thomas Harte
4601421aa6 This conditional is gone. 2021-03-03 20:52:01 -05:00
Thomas Harte
2f45e07d82 Further consolidates region map, now that shadowing is orthogonal. 2021-02-28 15:22:36 -05:00
Thomas Harte
496b6b5cfc Introduces a further 128 bits of storage to eliminate the conditional in IsShadowed. 2021-02-28 15:14:32 -05:00
Thomas Harte
8604b1786e Simplifies banks $02+ to a single region. 2021-02-27 23:34:51 -05:00
Thomas Harte
267e28e012 Adds various bits of debugging detritus. 2021-02-27 22:27:57 -05:00
Thomas Harte
631a8a7421 Adds bitset header. 2021-02-27 22:13:49 -05:00
Thomas Harte
7dcb0553e4 Switches to a target-centric view of shadowing. 2021-02-27 22:13:10 -05:00
Thomas Harte
2a7ea9f57c Merge branch 'master' into AppleIIgs 2021-02-26 21:31:18 -05:00
Thomas Harte
9781460c41 Thanks to a hint from the MAME guys: finally completes Macintosh 128kb and 512kb emulation (!) 2021-02-26 21:22:35 -05:00
Thomas Harte
55c9d152e9 Slightly smarter: this does branchless shadowing without additional storage. 2021-02-24 18:46:41 -05:00
Thomas Harte
6cf9099ce1 Don't clear the mouse data full flag until both registers have been read. 2021-02-23 21:57:02 -05:00
Thomas Harte
e6dc39f6f0 Makes an attempt at mouse event transmission. 2021-02-19 22:48:15 -05:00
Thomas Harte
28ce675c96 Takes a further stab at ::CommandDataIsValid. 2021-02-19 22:22:14 -05:00
Thomas Harte
3d91b0a31b Fixes keyboard data return. 
Input sort of works now! Except that key repeat is way out of control.
 2021-02-19 21:55:06 -05:00
Thomas Harte
5d1970d201 Adds a hacky different guess at how register access might work. 2021-02-19 21:46:18 -05:00
Thomas Harte
72d7901c88 Takes a shot at the keyboard data full flag. 
Just a guess. But likely?
 2021-02-19 20:06:12 -05:00
Thomas Harte
60cfec6a65 Amongst ever more cruft, adds a couple of extra asserts. 2021-02-18 22:49:48 -05:00
Thomas Harte
2e9065b34c Increases number of fixed initial values. 2021-02-18 22:48:53 -05:00
Thomas Harte
e42843cca0 This may temporarily exhaust my wit for asserts. 2021-02-16 22:47:46 -05:00
Thomas Harte
3336a123f8 Asserts even more overtly. 2021-02-16 22:33:28 -05:00
Thomas Harte
28bd620e7f Adds joystick support to the IIgs. 2021-02-16 19:39:22 -05:00
Thomas Harte
b117df3367 Factors out joystick logic. 2021-02-16 19:17:32 -05:00
Thomas Harte
fa8236741d Takes a shot at an ADB mouse. 2021-02-15 20:49:16 -05:00
Thomas Harte
e16d5f33d1 Adds service requests. The microcontroller now appears to consume keyboard events. 2021-02-15 20:33:10 -05:00
Thomas Harte
e773b331cd Implements register 2 listen. 2021-02-15 15:05:46 -05:00
Thomas Harte
99c21925f4 Makes attempt at keyboard mapping. 2021-02-15 15:00:12 -05:00
Thomas Harte
eccf5ca043 Makes first effort to wire up the ADB vertical blank input. 
However: looking at the disassembly, I'm not sure it really is wired to INTR. So work to do.
 2021-02-14 22:20:58 -05:00
Thomas Harte
24af62a3e5 Sets a default handler of 1. 2021-02-14 22:20:07 -05:00
Thomas Harte
52cf15c3e6 Attempts to route out modifier state. 2021-02-14 21:15:31 -05:00
Thomas Harte
a791680e6f Implements set_status as per advice. 2021-02-14 21:04:20 -05:00
Thomas Harte
6e53b4c507 Corrects centralised ADB decoder. 
I still think it's appropriate to do this in only a single place, given that using it is optional.
 2021-02-14 20:41:05 -05:00
Thomas Harte
52c38e72f6 Starts seeking to automate register 3 handling. 
Immediate pitfall: byte capture on the bus side isn't working correctly.
 2021-02-14 20:37:33 -05:00
Thomas Harte
a51d143c35 Corrects reactive-device transmission logic. 
Albeit that I'm still not properly responding to register 3 stuff, so the ADB bus needn't believe anything is out there. Also, without VSYNC being piped to the microcontroller it may well just not be polling anyway.
 2021-02-14 18:54:22 -05:00
Thomas Harte
17e9305282 Starts adding a keyboard. 2021-02-13 23:16:45 -05:00
Thomas Harte
c284b34003 Resolves inability of ADB microcontroller to read its own ROM (!) 2021-02-13 17:53:40 -05:00
Thomas Harte
2ab3bba695 Attempts GLU register latching, restoring expected startup sequence. 2021-02-13 17:38:42 -05:00
Thomas Harte
2c4dcf8843 Edges towards implementing an ADB device. 2021-02-12 21:50:24 -05:00
Thomas Harte
ea40b2c982 Takes a stab at implementing device response. 2021-02-12 18:56:43 -05:00
Thomas Harte
adfdfa205f Starts to establish the means by which I'll implement ADB devices. 2021-02-12 18:42:12 -05:00
Thomas Harte
33abdc95aa Adds a helper for decoding ADB commands. 
Still very noticeably to do: any sort of standard part for devices to respond to the bus.
 2021-02-10 21:39:33 -05:00
Thomas Harte
6ca8aa99fc Commit SDL and Qt project files; improve commenting. 2021-02-10 21:28:32 -05:00
Thomas Harte
17bac4c8cf Starts to formalise the ADB bus. 2021-02-10 21:24:31 -05:00
Thomas Harte
46bd20b5e0 Attempts to simplify ADB bit parsing. 
On-line output still looks reasonable, albeit that the microcontroller suddenly seems to be interested in devices F and 3 rather than 2 and 3.
 2021-02-08 22:08:49 -05:00
Thomas Harte
93a80a30d3 With correct divider appears to get reset requests posted. 2021-02-07 23:05:01 -05:00
Thomas Harte
77b1efd176 Sets sensible 'reset' values. 2021-02-07 21:53:57 -05:00
Thomas Harte
acfab1dfb3 Starts to make some effort at timers. 2021-02-06 21:02:44 -05:00
Thomas Harte
6526c645a5 Merge branch 'master' into AppleIIgs 2021-02-02 21:29:38 -05:00
Thomas Harte
1e041f1adf Flips conditionals to ensure 65802 safety. 2021-02-02 20:52:34 -05:00
Thomas Harte
beb514b231 Adds an additional mapping for copy. 2021-02-02 20:37:15 -05:00
Thomas Harte
f57e897085 Corrects visibility of SCSI output. 2021-02-02 20:24:39 -05:00
Thomas Harte
9f202d4238 Adds SCSI interrupt support. 2021-02-01 17:40:11 -05:00
Thomas Harte
1a40cc048e Niceties: include AP6 ROM for hard-disk users; show SCSI activity indicator. 2021-01-31 21:41:11 -05:00
Thomas Harte
53514c7fdc Ensures non-breakage of Qt interface. 2021-01-31 21:28:55 -05:00
Thomas Harte
274b3c7d24 Handles SCSI changes on-demand. 2021-01-31 21:24:54 -05:00
Thomas Harte
906b6ccdb7 This appears to be sufficient for the Electron to _read_ SCSI. 
So that's step one.
 2021-01-31 18:36:29 -05:00
Thomas Harte
8db289e229 Adds some notes-to-self on SCSI and a route to using Acorn's ADFS. 2021-01-31 13:12:59 -05:00
Thomas Harte
2860be7068 Permit a longer pause at startup for Electron commands that start with shift, control or func. 2021-01-31 12:25:22 -05:00
Thomas Harte
b5ecd5f7ef Merge branch 'master' into AppleIIgs 2021-01-31 11:47:40 -05:00
Thomas Harte
4636d8dfb7 Adds support for installing the AP6 ROM and/or sideways RAM. 2021-01-30 19:38:19 -05:00
Thomas Harte
b8c6d4b153 Rips out my high-level ADB microcontroller protocol implementation. 
Adds just enough that the main computer validates the ADB controller as present and talking.
 2021-01-30 17:53:27 -05:00
Thomas Harte
f50e8b5106 If I'm going to maintain the max_address approach, & is 'correct'. 
% +1 would be 'more correct', but I think this approach is probably misguided.
 2021-01-27 18:31:11 -05:00
Thomas Harte
dcc2fe0990 Improves M50470 entry-point detection, adds test output. 2021-01-26 21:29:17 -05:00
Thomas Harte
56111c75ae Makes first efforts towards disassembly. 2021-01-26 19:52:30 -05:00
Thomas Harte
fc4bda0047 Experimentally flipping interpretation of the output bit gives something closer to coherent. 2021-01-25 22:02:39 -05:00
Thomas Harte
c8beb59172 Attempts properly to track ADB bus activity. 
Output is not yet a valid ADB stream. Work to do.
 2021-01-25 17:43:22 -05:00