log vdp.h @ 1366:c74a2f31ae5f

age author description
Thu, 04 May 2017 22:47:51 -0700 Michael Pavone Fix transition from active to inactive display
Wed, 03 May 2017 21:28:40 -0700 Michael Pavone Implement the effect of VDP test register usage on the top and bottom borders. Fixes the remaning issue with the border dissolve in the "Ninja Escape" scene of Overdrive 2
Thu, 27 Apr 2017 23:08:49 -0700 Michael Pavone Fixes to sprite phase 2 so that sprite X reads use the exact same slot as on hardware in the case that there are fewer than the max number of sprites on each line. Re-read sprite Y from SAT cache during phase 2 and properly mask the calculated row. Fixes remaining issues with spinning cube scene in Overdrive 2.
Wed, 26 Apr 2017 22:16:12 -0700 Michael Pavone Small tweak to how SAT cache updates are done. Mostly fixes the rotating cube scene in Overdrive 2
Fri, 21 Apr 2017 01:22:52 -0700 Michael Pavone Fairly major rework of how active/passive is handled along with how the V30 mode bit is handled. Allows the vertical border extension trick in Overdrive 2 to work right
Tue, 18 Apr 2017 19:27:10 -0700 Michael Pavone Initial stab at implementing the output disable/layer selection bits of the VDP test register
Sun, 16 Apr 2017 16:40:04 -0700 Michael Pavone Initial work on handling the 128KB VRAM mode bit and some basic prep work for VDP test register support
Mon, 06 Mar 2017 00:23:35 -0800 Michael Pavone Initial stab at horizontal border emulation. Only works for H40 and still has a few minor holes to fill
Sun, 15 Jan 2017 15:07:24 -0800 Michael Pavone Initial work on emulating top and bottom border area
Thu, 05 Jan 2017 00:36:23 -0800 Michael Pavone Implemented Mode 4 H conter latching
Wed, 04 Jan 2017 20:43:22 -0800 Michael Pavone Don't lock up CPU if performing a read with writes configured when in PBC mode. Allow access to VDP debug commands from Z80 debugger in PBC mode. Handle Mode 4 in VDP debug print functions
Sun, 01 Jan 2017 21:06:32 -0800 Michael Pavone Update Mode 4 rendering to match logic analyzer captures
Tue, 27 Dec 2016 11:31:17 -0800 Michael Pavone Somewhat broken implementation of Mode 4
Thu, 22 Dec 2016 19:51:25 -0800 Michael Pavone Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
Mon, 28 Nov 2016 22:45:46 -0800 Michael Pavone Clean up symbol visiblity and delete a ltitle bit of dead code
Mon, 22 Aug 2016 09:46:18 -0700 Michael Pavone Cleanup the separation of render backend and VDP code in preparation for having extra debug windows. Make determination of H40/H32 based on number of lines in each mode.
Mon, 02 May 2016 23:08:20 -0700 Michael Pavone Fix GST savestate loading to deal with SAT cache to fix sprite corruption on savestate load. Clear out Z80 native_pc so the Z80 state does not get hosed when loading a savestate while the emulator is already running
Sat, 30 Apr 2016 15:31:48 -0700 Michael Pavone Implement SAT cache. Causes some graphical corruption in Overdrive due to an unrelated bug.
Sun, 24 Apr 2016 01:24:38 -0700 Michael Pavone Implemented VDP read prefetch and made DMA copy not use the FIFO any more. Now up to 114 out of 122 passing on VDP FIFO Test ROM
Tue, 12 Apr 2016 21:38:24 -0700 Michael Pavone Remove the int number argument to vdp_int_ack since it is no longer used
Thu, 28 Jan 2016 09:10:14 -0800 Michael Pavone Shift slot number to slot behavior mapping by six slots in H40 mode. This makes the line change slot align with the point at which the display turns on and off at the end of the active display area. Also fixed a regression in which an external slot got accidentally changed into a sprite draw slot
Fri, 13 Nov 2015 22:56:59 -0800 Michael Pavone Selecting a second game from the menu now works
Thu, 21 May 2015 00:55:46 -0700 Michael Pavone Restore the other 2 debug display modes
Tue, 19 May 2015 23:23:53 -0700 Michael Pavone Small correction to VBLANK flag timing. Fixed some inconsistencies in interrupt timing calculation.
Sat, 16 May 2015 23:04:57 -0700 Michael Pavone First pass at emulating a vscroll latch. Titan's Overdrive demo seems to depend on the scroll value being latched early in the line before the HINT gets a chance to change it
Mon, 11 May 2015 00:28:47 -0700 Michael Pavone Sync fixes and logging to fix more sync issues
Sun, 04 Jan 2015 23:05:37 -0800 Michael Pavone Some small synchronization improvements that do not seem to fix anything
Wed, 18 Jun 2014 16:30:19 -0700 Michael Pavone Fix most of the breakage caused by the vcounter/hcounter changes
Tue, 17 Jun 2014 19:01:01 -0700 Michael Pavone Partially working switch to having a vcounter and hslot counter in the context rather than trying to derive them from the cycle count. This should allow for more accurate handling of mid screen mode switches. Interrupt timing is broken currently though
Mon, 07 Oct 2013 10:02:08 -0700 Mike Pavone Initial implementation of sprite overflow and sprite collision status register flags
Tue, 17 Sep 2013 09:45:14 -0700 Mike Pavone Implement HV counter latch
Tue, 17 Sep 2013 00:11:45 -0700 Mike Pavone Fix DMA fill so that it does not cause observable changes to the FIFO. Get DMA copy mostly correct from an observable ffect perspective. DMA copy probably does not reflect internal implementation still given that evidence seems to suggest no FIFO usage at all.
Sun, 15 Sep 2013 22:20:43 -0700 Mike Pavone Implement FIFO as a ring buffer so the behavior of reads from invalid CRAM and VSRAM bits can be implemented properly
Fri, 13 Sep 2013 19:22:46 -0700 Mike Pavone Properly delay 68K on VDP reads. Dummy VDP test port implementation. Initial stab at handling undefined bits of VSRAM and CRAM.
Tue, 10 Sep 2013 23:31:08 -0700 Mike Pavone Added copyright notice to source files and added GPL license text in COPYING
Tue, 10 Sep 2013 00:29:46 -0700 Mike Pavone Implement FIFO latency and improve DMA accuracy
Fri, 26 Jul 2013 19:55:04 -0700 Mike Pavone Added support for saving savestates. Added gst savestate format test harness
Mon, 15 Jul 2013 23:07:45 -0700 Mike Pavone Restore one of the VDP debugging modes
Fri, 12 Jul 2013 19:11:55 -0700 Mike Pavone Implement the scroll ring buffer properly without memcpy
Sun, 30 Jun 2013 11:45:58 -0700 Mike Pavone Make VDP render in native pixel format of the renderer for a modest performance gain and to make it easier to use OpenGL for rendering
Sat, 29 Jun 2013 17:15:08 -0700 Mike Pavone Add support for loading GST format savestates
Sat, 22 Jun 2013 21:19:43 -0700 Mike Pavone Initial work on interlace
Wed, 15 May 2013 22:37:04 -0700 Mike Pavone Fix background color regsiter number
Tue, 14 May 2013 00:40:10 -0700 Mike Pavone Update Z80 vint timing
Mon, 13 May 2013 21:06:08 -0700 Mike Pavone Added some basic VDP debugging features to debugger. Fixed DMA enable bug
Sat, 11 May 2013 22:45:05 -0700 Mike Pavone Remove z80_ram reference in SDL renderer to get stateview compiling again. Print out the sprite list in stateview.
Fri, 10 May 2013 22:57:56 -0700 Mike Pavone Initial stab at horizontal interrupts and improving accuracy of vertical interrupts. Also added the VINT pending flag to status port.
Mon, 22 Apr 2013 19:39:38 -0700 Mike Pavone Implemented shadow hilight mode.
Sun, 06 Jan 2013 20:49:42 -0800 Mike Pavone Fix order of SR and PC saved in an exception stack frame
Tue, 01 Jan 2013 07:06:57 -0800 Mike Pavone Make writes to control and data port block when DMA is in progress
Mon, 31 Dec 2012 11:26:57 -0800 Mike Pavone Fix VDP reads
Sun, 30 Dec 2012 22:39:41 -0800 Mike Pavone Implemented HV counter
Sun, 30 Dec 2012 01:15:16 -0800 Mike Pavone Fix bug that was causing DMA fills to lock up under certain circumstances
Fri, 21 Dec 2012 20:56:32 -0800 Mike Pavone Implement DMA (untested)
Wed, 19 Dec 2012 22:15:16 -0800 Mike Pavone Fix issue in which VDP would have trouble emptying FIFO because the VDP cycle count got reset at end of frame.
Tue, 18 Dec 2012 19:51:33 -0800 Mike Pavone Fix CRAM and possibly VSRAM writes
Tue, 18 Dec 2012 02:16:42 -0800 Mike Pavone Get Flavio's color bar demo kind of sort of working
Sun, 09 Dec 2012 18:40:45 -0800 Mike Pavone Add debug render mode and fix vertical flip bit for bg tiles
Sun, 09 Dec 2012 00:03:15 -0800 Mike Pavone Implement sprite index >= sprite limit triggers sprite limit behavior
Sat, 08 Dec 2012 23:49:51 -0800 Mike Pavone Initial H32 mode support