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Code Issues Projects Releases Wiki Activity
4,610 Commits 8 Branches 121 Tags 496 MiB
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Commit Graph

646 Commits

Author SHA1 Message Date
Thomas Harte
1fc88c4eff Corrects off-by-one error in line fetching coroutines. 2018-10-16 21:36:31 -04:00
Thomas Harte
58ca74c68a Resolves right-side TMS sprite droppages. 2018-10-16 21:25:08 -04:00
Thomas Harte
b4f871a2ef Corrects first line sprite row selection. 2018-10-16 21:16:29 -04:00
Thomas Harte
0f7bf6d6c6 Resolves attempt to output graphics on the line one before the display. 2018-10-16 21:02:31 -04:00
Thomas Harte
5dfe7d8596 Corrects most of TMS sprite drawing. 2018-10-16 20:49:04 -04:00
Thomas Harte
231009b901 Makes faulty attempt to reintroduce TMS-mode sprites. 2018-10-16 20:00:06 -04:00
Thomas Harte
1c5f939aea Reintroduces tiles and some element of sprites in regular TMS mode. 2018-10-14 21:52:13 -04:00
Thomas Harte
c1e6406fc9 Corrects sprite accumulation. 2018-10-14 19:56:09 -04:00
Thomas Harte
d66979c68f Switched to a very large number of buffers, and resolved stupid attempt to reassign a reference. 2018-10-14 18:19:11 -04:00
Thomas Harte
6c09abc6cb Makes a flawed attempt to reformulate this exactly as two separate processes on a common clock with an interchange buffer. 
Specifically because closer inspection of the TMS modes shows it isn't quite valid to model output of one line as having fully completed prior to fetching of the next. So some sort of extra buffer is required. At which point it is most natural to continue with the logic that each fetch routine is oriented around the fetching process for a single line, and each output routine has the same view, suggesting separate read/write addresses.

Something is wrong though, as video data is being output too rapidly (I think) and with occasional sync issues (again: subject to investigation).
 2018-10-14 16:23:45 -04:00
Thomas Harte
9e52ead09a Ensures sprite scanning doesn't improperly set collision flag; that slot 151 is filled. 2018-10-12 19:50:48 -04:00
Thomas Harte
9ab0c54426 Eliminates faulty attempt to satisfy SMSVDP vertical counter test. 2018-10-12 18:57:07 -04:00
Thomas Harte
f6af6778ab Moves scrolling latch to proper position and implements 4-window fetching offset. 2018-10-11 22:36:27 -04:00
Thomas Harte
6a94dda60d Selects potentially-correct interrupt times. 2018-10-11 21:42:09 -04:00
Thomas Harte
82b7944599 Fixes horizontal counter wrapping. 2018-10-11 20:37:29 -04:00
Thomas Harte
52e02db5c8 Introduces horizontal counter latching and reading. 
Then makes a new guess at frame IRQ position. But gets it wrong. Hmmm.
 2018-10-11 19:56:32 -04:00
Thomas Harte
9a933993f5 Added TODO. 2018-10-10 22:17:17 -04:00
Thomas Harte
062b2ae8d3 Corrects calculation of [NTSC, 192 line] current row. 2018-10-10 22:15:38 -04:00
Thomas Harte
9f69dbf31a Adds half-updating of RAM pointer. 
This emulator now passes the first screen of the SMS VDP test.
 2018-10-10 21:59:08 -04:00
Thomas Harte
63fb3f03d1 Corrects address loading upon accesses of registers other than 0. 2018-10-10 21:47:48 -04:00
Thomas Harte
2e379b0834 Adds latching of scroll values. 2018-10-10 21:28:18 -04:00
Thomas Harte
f00f6c8c23 Allows the frame interrupt to be placed anywhere in the frame. 2018-10-10 21:07:39 -04:00
Thomas Harte
50e23f4a2e Fixes 16px-high sprites. 2018-10-10 20:34:00 -04:00
Thomas Harte
acdc84e08c Improves test slightly, and fixes line interrupt reload value setting. 2018-10-09 22:14:35 -04:00
Thomas Harte
c128ddb549 Introduces a first unit test for line interrupts and corrects backup behaviour. 2018-10-09 21:49:21 -04:00
Thomas Harte
dccf17e770 Makes a first serious attempt at Master System line interrupts. 2018-10-09 20:51:09 -04:00
Thomas Harte
2d8ab72e22 Fixed proper starting position for (interrupted) tile drawing. 2018-10-08 23:13:37 -04:00
Thomas Harte
748366c70e Corrects buffer overrun when the horizontal scroll lock is on. 2018-10-08 23:06:22 -04:00
Thomas Harte
7a74fe2ff7 Corrects tile plotting window and eliminates a redundant local. 2018-10-08 22:56:31 -04:00
Thomas Harte
e410302237 Switches to real SMS line output composition. 
Including setting the sprite collision bit.
 2018-10-08 22:43:10 -04:00
Thomas Harte
bca2161a05 Fixes TMS text mode for the new addressing order. 2018-10-07 21:09:01 -04:00
Thomas Harte
5f789092be Flips sprite priority in the temporary renderer. 
The better to test other issues in the interim.
 2018-10-07 19:16:35 -04:00
Thomas Harte
6975ed22c0 Doubles down on address-storage format, and implements the vertical scrolling lock. 2018-10-07 18:55:35 -04:00
Thomas Harte
3bead07043 Introduces proper indirection for sprite patterns. 
This seems to work, so the onus is now back on the rendering loop.
 2018-10-07 17:15:42 -04:00
Thomas Harte
ee20e42372 Makes initial attempt at collecting sprite contents. 
With test plotting, indicating some sort of issue.
 2018-10-07 16:53:25 -04:00
Thomas Harte
df411b4ede Corrects storage of visible sprites. 2018-10-07 16:40:32 -04:00
Thomas Harte
bfb9d8ccb6 At least attempts to use proper addressing for sprite info fetches. 2018-10-07 14:32:20 -04:00
Thomas Harte
338aec2930 Groups background fetches and experimentally seeks to daub sprites as white. 2018-10-06 22:07:04 -04:00
Thomas Harte
e6510dc87b Attempts to get at least as far as picking visible sprite indices. 2018-10-06 19:27:19 -04:00
Thomas Harte
7830cda912 Implements line querying and most of line interrupts. 2018-10-04 22:50:35 -04:00
Thomas Harte
aac97a8983 Re-revokes fine scroll on the top two lines when requested. 2018-10-04 19:18:15 -04:00
Thomas Harte
ca26dfcd61 Correct Master System palette writes. 2018-10-04 19:12:31 -04:00
Thomas Harte
858721a7a5 Added left border hiding. 2018-10-04 18:52:23 -04:00
Thomas Harte
89db1d6a6a Switches to a more accurate means of left-padding. 2018-10-04 18:44:49 -04:00
Thomas Harte
de4e5c40aa Implements horizontal scrolling lock. 2018-10-03 23:28:33 -04:00
Thomas Harte
05248ab990 Starts to reimplement Master System output. 2018-10-03 23:13:21 -04:00
Thomas Harte
252f47a425 Ensures no pixel output on line one before end, and adds a temporary debugging test. 2018-10-02 22:59:20 -04:00
Thomas Harte
be52b31b5c Attempts fully to revive text mode. 2018-10-02 22:05:58 -04:00
Thomas Harte
23c3fa6993 Fixed: it's the SMS that has 8 sprites, not text mode (which has none). 2018-10-02 22:01:43 -04:00
Thomas Harte
499fc62187 Sets things up for implementation of the inner mode-specific logic. 2018-10-02 21:58:09 -04:00
Thomas Harte
1dd5272190 Ensures real-time output of all areas, to ensure proper palette response. 2018-10-02 21:18:28 -04:00
Thomas Harte
5361120353 Restores a stable frame. 2018-10-02 21:05:30 -04:00
Thomas Harte
60bab8fdf1 Starts to reformulate TMS collection as coroutines. 
For the time being, thereby breaks all video. A static screen of the border colour is all you'll see.
 2018-10-01 23:03:17 -04:00
Thomas Harte
91aa8f9295 Amps up colour content a little. 2018-09-30 20:47:26 -04:00
Thomas Harte
23191efc05 Starts writing and referring to colour RAM for colours. 2018-09-29 19:50:13 -04:00
Thomas Harte
0d8af010b6 Takes a stab at tile reversal and vertical scrolling. 2018-09-28 22:37:10 -04:00
Thomas Harte
7b9bb772ca Corrected to give a not-exactly-indexed-correctly approximation of what's on display. 2018-09-28 21:03:51 -04:00
Thomas Harte
f7e211c245 Makes first attempt to put something vaguely like the Master System tile map on screen. 2018-09-28 20:39:14 -04:00
Thomas Harte
35c2e74af8 Attempts to establish a coroutine-ish structure for access patterns. 
The Master System mode, inevitably, is the test case.
 2018-09-27 22:33:41 -04:00
Thomas Harte
19482a563f Attempts to explicitly make room for the SMS VDP mode. 2018-09-27 21:22:57 -04:00
Thomas Harte
9683c8f664 Advances towards the Master System actually receiving interrupts. 2018-09-23 15:58:23 -04:00
Thomas Harte
e7f4babf41 Starts taking steps towards SMS/GG and V9938/9958 support. 
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
a38639d099 Eliminates the concept of an iCoordinate. 
Real-life precision appears not to support the idea of sub-sample pixel storage.
 2018-09-12 20:05:39 -04:00
Thomas Harte
31b048f966 Ensures all bools start in a valid state. 2018-09-10 22:21:03 -04:00
Thomas Harte
7b9c1bb69c Makes minor layout improvements. 2018-09-09 21:02:31 -04:00
Thomas Harte
70c4d6b9b3 Adds a one second delay between controller and drive motor off. 2018-08-03 21:13:18 -04:00
Thomas Harte
98bb5bd9f1 Ensures flux bits are observable for two cycles rather than one; it should be 1us. 2018-07-31 23:01:11 -04:00
Thomas Harte
92065813ef Ensures only the first 8px of sprites is output in 8x8 mode. 
Also adds a little extra documentation.
 2018-07-15 22:21:29 -04:00
Thomas Harte
cd464fc7de Corrects status logging. 2018-06-26 20:53:08 -04:00
Thomas Harte
df8c896193 Removes unused state and implements AND output readback. 2018-06-26 19:31:16 -04:00
Thomas Harte
59f8eeb05a Ensures the AY goes high impedance when not in read mode. 2018-06-25 20:48:24 -04:00
Thomas Harte
5ab4cfee84 Factors out repeated hex-size setting. 2018-06-21 19:27:54 -04:00
Thomas Harte
a9eb0d02c6 Returns sanity to 8272 logging. 2018-06-20 23:02:32 -04:00
Thomas Harte
adca862166 Finally makes an initial pass at logging macros. 2018-06-18 22:37:19 -04:00
Thomas Harte
dde9b73a22 Creates the through-path that will be necessary for RWTS acceleration. 2018-06-09 12:51:53 -04:00
Thomas Harte
076fa55651 Corrects: flux set is no-flux incoming. 
This restores good sleeping behaviour.
 2018-06-03 08:11:17 -04:00
Thomas Harte
1a9cea050e Minor: ensure AY registers *read* as 0 from reset, as well as being 0. 2018-06-01 19:48:42 -04:00
Thomas Harte
35e84ff1a8 Corrects NTSC quadrature phase. 2018-05-31 21:40:46 -04:00
Thomas Harte
75f9e3caeb Resolves incorrect bracketing. 2018-05-28 17:48:35 -04:00
Thomas Harte
928aab13dc Introduces more granular clocking announcements to the Disk II. 
As well as making it accept the clock rate it'll actually receive, to supply to the drives, so that they spin at the proper speed.
 2018-05-28 17:19:29 -04:00
Thomas Harte
db8d8d8404 Commutes Sleeper to ClockingHint::Source, making state more granular. 2018-05-27 23:17:06 -04:00
Thomas Harte
086b801c29 Mildly rearranges to avoid unnecessary call. 2018-05-22 21:50:07 -04:00
Thomas Harte
e482929da8 Enhances the Disk II's ability to sleep. 
Also enables Disk II sleep observation in the Oric.
 2018-05-19 23:15:28 -04:00
Thomas Harte
ed06533e60 Implements write support out of the Disk II. 2018-05-18 22:07:58 -04:00
Thomas Harte
7b7beb13a3 Eliminates the fiction of setting and getting registers. 
The Disk II seems lower level than that; it will read the data bus whenever it likes, it is the programmer's responsibility to keep up with that. It also reserves the right not to load the bus regardless of whether it receives a read or write access.
 2018-05-17 21:39:11 -04:00
Thomas Harte
c46007332a Switches to returning the shift register contents on every even read. 2018-05-17 20:18:34 -04:00
Thomas Harte
908d3b0ee5 Slightly wrong as to the details, but gets the controller trying to output. 
At an initial look, I think the shift register should end up on the data bus for all odd accesses. Need to investigate more thoroughly.
 2018-05-16 22:37:22 -04:00
Thomas Harte
8a031b1137 Eliminates 'data' register as it doesn't exist; rejigs state machine command set. 2018-05-16 22:09:59 -04:00
Thomas Harte
1aba9f807e Ensures proper upward propagation of sleeping from first start. 2018-05-16 22:07:54 -04:00
Thomas Harte
4c49963988 Switches to proper handling of the motor control and write protection. 
Per Understanding the Apple II the drive looks write protected  while phase 1 is enabled.
 2018-05-16 21:44:09 -04:00
Thomas Harte
ad9b0cd4e3 Eliminates all endashes. 2018-05-13 15:43:03 -04:00
Thomas Harte
5d6b5d9f10 Eliminates all emdashes in cross-platform code. 2018-05-13 15:34:31 -04:00
Thomas Harte
0b771ce61a Removes all instances of the copyright symbol. 2018-05-13 15:19:52 -04:00
Thomas Harte
d703328114 Adds missing #include for memcpy. 2018-05-12 17:54:13 -04:00
Thomas Harte
bc464e247f The 1540 and, by extension, the Vic-20 are now activity sources. 2018-05-11 22:24:33 -04:00
Thomas Harte
a43ca0db35 Makes the Apple II an activity source. 2018-05-10 22:17:13 -04:00
Thomas Harte
c3144382c5 Shuffles the Disk II ROM at load time into B.A.P. form. 
Only if required. In order to support various potential forms of supplied ROM.
 2018-05-09 22:03:59 -04:00
Thomas Harte
c3a2f7717b Makes attempt to implement support for the Pravetz 8D + 8DOS. 
i.e. the Disk II wired up to the Oric, with some ROM swaps.
 2018-05-08 22:05:43 -04:00
Thomas Harte
f65c65569a Makes disk head position explicitly something with sub-integral precision. 
Also as a drive-by fix, corrects accidental assumption of 10 sectors for all MFMSectorDump descendants.
 2018-05-06 23:17:36 -04:00
Thomas Harte
aacf26f05d Removed logged comment. 2018-04-30 22:03:09 -04:00