Another milestone is finally reached wiith Scrapyard Dog's sewer level finally being correctly emulated. This level was another main driver for me to create this emulator after seeing Mothrayas' TAS of this game contain a pretty bad graphical glitch in this level.
What this glitch comes down to is DMA timing around what is called 'holey DMA.' Basically DMA can be told to ignore certain address blocks, and when it does so there is no DMA read penalty for addresses in that block.
Except, there is a penalty for the first read in order to identify that block in the first place. Getting this (and pretty much everything else DMA related) right is what fixes scrapyard dog.
EDIT: @MESHUGGAH: I unified the controller definitions between EMU7800 and A7800Hawk (at least for 2 button and joystick controllers) so you should be able to compare movies now I think.
- I can't test it with controller (with cursor). Controllers joystick: can't shoot. I also had a random glitch from changing light gun to joystick, reset core, start game, white screen every 3rd-4th frame (like an autofire) without any input pressed/shown in display
Does Mesen have a TAS Editor and a way to watch Ram Addresses? I will write up what I am looking for later on and we can go from there. Thanks!
Just a little question, because I never test it, but in cores that support light gun or equivalent in BizHawk, is it possible to use the mouse for it?
I rewrote the Maria renderer in A7800Hawk to make it pixel accurate. Now the one stray line in Kung Fu Master is fixed.
This also brought with it a dramatic simplification of the code, which makes it much more managable.
As accuracy picks up the core is starting to slow down a bit though. I used to be stable 240 FPS at 4x speed, but now I'm maxed out at 200 or so. I'll try to recover a bit of that slowdown once all the bugs are worked out.
1. Alyosha, can I ask what documents you are using for implementing features? 2. For difficulty switch (previous post), I see this for PAL (probably ntsc same), schematic: http://imgur.com/9EmVuKd NTSC http://imgur.com/4WYWxtY I'm not sure what am I seeing, but does this mean these buttons (l diff, r diff, pause, select, reset) can be pressed at... every frame? every interrupt? vblank? 3. Remaining, non listed bugs - 7800 Birthday (homebrew) can't be started, same apply for EMU7800 - Spikes added (homebrew) boots! However, I think there should be a jump button (atleast I can't jump) (todo: check for source code) - Super Stunt Cycle boots! However, can't do much. (todo: download source code, check what should happen) - Snake (homebrew) - random lag frame fixed! But, for menu, you need to hold the buttons for 4 frames (todo: check for source code)
User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X)
AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.0 Mobile/14F89 Safari/602.1
Vector Block Result Duration
12 3 correct 605.50ms
13 3 correct 736.20ms
14 3 correct 1437.90ms
15 3 correct 2853.40ms
16 3 correct 5656.80ms
12 4 correct 712.40ms
13 4 correct 1429.50ms
14 4 correct 2523.90ms
15 4 correct 5049.20ms
16 4 correct 10088.10ms
12 5 correct 1261.30ms
13 5 correct 2504.90ms
14 5 correct 5020.10ms
15 5 correct 10069.90ms
16 5 correct 20147.80ms
Status: Done.