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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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
