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Author SHA1 Message Date
Thomas Harte 12f063c178 Hack in a stable sync. 2025-09-17 21:35:41 -04:00
Thomas Harte 888148d282 Reduce chatter. 2025-09-17 21:35:34 -04:00
Thomas Harte 7bba0b82ef Correct video address generation. 2025-09-17 21:26:13 -04:00
Thomas Harte 41196a862d Merge pull request #1565 from TomHarte/BBCKeyboard 2025-09-17 18:22:47 -04:00
Thomas Harte a99ed0e557 Add break key. 2025-09-17 17:26:28 -04:00
Thomas Harte 654981fb03 Clean up. 2025-09-17 17:24:08 -04:00
Thomas Harte c473c36d46 Add comma, etc. 2025-09-17 11:48:33 -04:00
Thomas Harte e863e61af8 Remove dead code. 2025-09-17 11:46:53 -04:00
Thomas Harte efb486dd1b Fill in much more of key map. 2025-09-17 11:46:29 -04:00
Thomas Harte 25b15fcdd1 Switch to map-based mapping. 2025-09-17 11:34:55 -04:00
Thomas Harte 1106fbb5ef Implement circular scan. 2025-09-17 10:44:53 -04:00
Thomas Harte 9e1a29f0ff Merge branch 'master' into BBCKeyboard 2025-09-16 23:16:03 -04:00
Thomas Harte b3c057f911 Increase logging, play about more. 2025-09-16 23:14:05 -04:00
Thomas Harte 1c33e9ead9 Attempt row scanning. 2025-09-16 23:03:25 -04:00
Thomas Harte d78f35b940 Take a swing at scanning versus not. 2025-09-16 22:29:00 -04:00
Thomas Harte 506236a5ed Merge pull request #1564 from TomHarte/BBCPixels 
Hard-code Mode 0 but hence get some pixels.
 2025-09-16 21:52:16 -04:00
Thomas Harte 18b32dbba3 Attempt keyboard input. 2025-09-16 21:51:25 -04:00
Thomas Harte 26e40564dc Establish keyboard state. 2025-09-16 21:11:27 -04:00
Thomas Harte b6e8421a0a Hard-code Mode 0 but hence get some pixels. 2025-09-16 20:57:21 -04:00
Thomas Harte 03c5a3b325 Merge pull request #1563 from TomHarte/BBCACIA 
BBC: Add ACIA.
 2025-09-16 20:38:43 -04:00
Thomas Harte a1f33d3fc6 Redisable test code. 2025-09-16 17:54:42 -04:00
Thomas Harte b8fca7db80 Merge branch 'master' into BBCACIA 2025-09-16 17:54:17 -04:00
Thomas Harte 6ea70cd245 Merge pull request #1562 from TomHarte/BBCCRTC 
Add some degree of a CRTC.
 2025-09-16 17:53:49 -04:00
Thomas Harte 683fea675e Add ACIA. 
Probably with incorrect clock, and connected to nothing.
 2025-09-16 17:50:54 -04:00
Thomas Harte 811a010a60 Fix: keys are now unpressed. 
Some sort of text is now 'output' (though not yet displayed by the emulator) and then an endless loop on the ACIA begins.

So the next PR will need to add that.
 2025-09-16 17:25:13 -04:00
Thomas Harte 019526332d Declare no tube, optimistically watch for characters. 2025-09-16 16:25:41 -04:00
Thomas Harte 1e90387198 Add extra curly brackets. 2025-09-16 16:25:29 -04:00
Thomas Harte 84d6bb47ea Log more. 2025-09-16 15:32:42 -04:00
Thomas Harte 512179d92a Handle clock-rate change correctly in onward signalling. 2025-09-16 13:04:03 -04:00
Thomas Harte 04344a3723 The OS isn't writeable. 2025-09-16 12:47:55 -04:00
Thomas Harte d032207473 Made some attempt at 1Mhz CRTC clocking. 2025-09-16 12:46:44 -04:00
Thomas Harte b33dc2779d Correct RAM visibility. 2025-09-16 12:24:48 -04:00
Thomas Harte 28699a1af5 Correct clock selection bit. 2025-09-16 09:15:08 -04:00
Thomas Harte ff3fe135a3 Convince myself that this isn't a case of present but invisible content. 2025-09-16 07:36:59 -04:00
Thomas Harte ff69709926 Disable interlace support. 2025-09-15 23:53:36 -04:00
Thomas Harte 2162822cec Eliminate C++23 extension. 2025-09-15 23:42:57 -04:00
Thomas Harte 34330baaa0 Add comment on keyboard. 2025-09-15 23:42:47 -04:00
Thomas Harte 28d8aab7e5 Forward Port A correctly. 2025-09-15 23:36:07 -04:00
Thomas Harte 6a91c89126 Introduce a colour burst. 2025-09-15 23:32:20 -04:00
Thomas Harte c350f6fe5e Fix interrupting sync. 2025-09-15 23:28:38 -04:00
Thomas Harte 493bf0a666 Proceed to a solid blank display. 2025-09-15 23:27:04 -04:00
Thomas Harte 0305203e61 Wire up vertical sync interrupt. 2025-09-15 23:21:06 -04:00
Thomas Harte 71d7b1dfad Add a ticking-but-diconnected CRTC. 2025-09-15 23:16:42 -04:00
Thomas Harte 69748a1f1b Merge pull request #1561 from TomHarte/BBC6522s 
BBC Micro: add 6522s.
 2025-09-15 22:39:08 -04:00
Thomas Harte 39c2db38b7 Improve logged IO detail. 2025-09-15 22:29:22 -04:00
Thomas Harte f499de3622 Add sideways ROM paging. 2025-09-15 22:26:02 -04:00
Thomas Harte e8a16a8fce Attempt to incorporate SN76489. 2025-09-15 22:17:40 -04:00
Thomas Harte 81f2952c97 Log just enough to see that this looks like an SN76489 write. 2025-09-15 22:03:37 -04:00
Thomas Harte dcf9de1a01 Add IO access to the 6522s. 2025-09-15 21:26:36 -04:00
Thomas Harte 95f57f4eeb Add VIA instances, flesh out 1Mhz space. 2025-09-15 21:23:34 -04:00