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Code Issues Projects Releases Wiki Activity
10,206 Commits 8 Branches 121 Tags 496 MiB
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Commit Graph

90 Commits

Author SHA1 Message Date
Thomas Harte
465ecc4a78 Attempts to implement proper floating bus behaviour. 
As per http://sky.relative-path.com/zx/floating_bus.html
 2021-03-24 20:23:33 -04:00
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
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
6da099d7e1 Ensures the enter key is cleared before fast-loading tapes have loaded. 2021-03-22 22:42:10 -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
3ef2715eee Implements the ROM version of fast loading. 2021-03-22 19:04:38 -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
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
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
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
07a63d62dd Adds some quick arithmetic on the clock speed. 2021-03-20 11:19:44 -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
2ee478b4c4 Goes some way towards wiring up Spectrum options. 2021-03-19 22:17:20 -04:00
Thomas Harte
a482ce1546 Adds a tape player. 2021-03-19 11:12:50 -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
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
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
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
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
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