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4,129 Commits 8 Branches 121 Tags 496 MiB
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137 Commits

Author SHA1 Message Date
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