SpritesMind.Net

Stef wrote:and honestly FM SFX are generally crappy, better to stand with PSG or PCM.

For example all sfx in RRR is FM! (except larry)
Sonic using FM/PSG too (I'm not sure about PSG)
All I can say: if sfx is crappy -> then it's just poor made.

Any timing of transfer-DMA will be in same func that starts it. In other words, it's not spread around.
So, I don't see any reason to take off account DMA, except if you want to do some DMA copy/fill.

You can grab opcode lengths & opcode timings from any emulator source,
then get gens r57shell mod and put timings into lua, then setup break on PC on whole ROM, and count each opcode timing.

btw joypad & dma should be in same gemsdmastart() gemsdmaend() block.
You don't need to stop z80 for joypad. All you need is guarantee no access to m68k bus. That is done by this funcs.

I'm not sure why you're trying to figure out the pipeline stages, I've already finished that, the information is in my VHDL operator unit at https://github.com/sauraen/YM2612/blob/master/Source/operator.vhd . There are five stages that actually do work, one that just stores the value, and an additi...

Is there in fact an internal /6 divider on the clock line Yup, this has been known for a while. It takes 24 INTERNAL clock cycles to evaluate everything, which is 144 external clock cycles. Hmm, if /6 then 24 cycles for whole processing? We have 6 channels 4 operators = 24 operators in total. Also,...

From this thread . Here it is: // abcd d0, d1 static u8 abcd(u8 d0, u8 d1, u8 flags_in, u8* flags_out) { u8 res; asm volatile ("move %4,%%cc\n" "abcd %3,%0\n" "move %%sr,%1\n" : "=d" (res), "=d" (*flags_out) : "0" (d1), "d" (d0), "d" (flags_in) : "cc" ); return res; } Somewhere online is good docs a...

It does make a difference to my VHDL code, though--otherwise the channels will all work, but which channel's registers and values are being used by which units on what cycles will be all mixed up. (E.g. I might have ch3 op4 getting its envelope attenuation value from ch6 op4 or from ch3 op3.) But i...

Anyway you overcomplicating things. Sorry if I'm being captian obvious :D Let say 1) We have 3 workers. 2) Each has different profession. So, he can do only single type of job. 3) They can't do several jobs at once. 4) They do only single type product. 5) Time to make any kind of job are equal betwe...

I'm not sure to understand... What to precalculate ? Let say we have function T getPlayerCollision(int x, int y) It returns value of type T, representing collision type/data. It answers to question: "what kind of collision is for player if player located at position x, y?" It may use loops inside, ...

It's not slow. Just count in cycles of M68k
Maximum that you can do is... precalculate all that data into single array.

I just wanna warn you. If you wanna make full disassembly of some game, it will took for you several years. (solo) I'd say months is closer to accurate, depending on the size of the ROM and complexity of the code. Of course, the skills of the user also factors on the speed they can resolve code. Ye...

I just wanna warn you.
If you wanna make full disassembly of some game, it will took for you several years. (solo)

if it's unchangable array (with const modifier), then it will be inside of ROM, so up to 4 megabytes in size (subtract your code size (size of assembly)) ROM limit is 4 megabytes. if it's changable array (without const modifier), then it will be inside of RAM, so up to 64 kilobytes. 0x10000 bytes. B...

write equations, how much should be scroll on top of road.
and you'll see your bug.
reason is because you're calculating from bottom.