Gens4All with Z80 Emulation

[matador]

Thanks man. This incredible work.

[KmusDC]

Hello bro, excellent contribution, good to see updates for this magnificent emulator. I would like to know how to convert it to an iso for dreamshell. Greetings

as normal that should work use iso make tools once you get the files from abovr un scramble the 1St_read.bin normal stuff

thanks a lot. It works perfect.

[TapamN]

The example code I posted is equivalent to this:

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void pvr_tex_lmemset32(pvr_ptr_t dst, int l, size_t len) {
	//Set PVR DMA registers
	volatile int *pvrdmacfg = (int*)0xA05F6888;
	pvrdmacfg[1] = pvrdmacfg[0] = 0;
	
	//Convert read/write area pointer to DMA write only area pointer
	void *dmaareaptr = ((uintptr_t)dst & 0xffffff) | 0x11000000;
	
	sq_set32(dmaareaptr, l, len);
}

I've tested it, and it definitely works on real hardware. It's possible that some/all emulators don't support it.

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   //Set QACR registers
   volatile int *qacr = (int*)0xFF000038;
   qacr[1] = qacr[0] = 0x11;

How does this related to

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    /* Set store queue memory area as desired */
    QACR0 = ((((unsigned int)sbuf->vramData)>>26)<<2)&0x1c;
    QACR1 = ((((unsigned int)sbuf->vramData)>>26)<<2)&0x1c;

My qacr[0]/qacr[1] value is just the precalculated result of what's written to QACR0/QACR1. Also, all that needs to be done to generate the QACR value for a given pointer is "(unsigned int)ptr >> 24". The extra shifting and masking is unnecessary.

In your sh4 lib

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#define NONCACHED(a) (typeof (&(a)[0]))(((unsigned int)(a)) |  (1 << 29))
#define CACHED(a)    (typeof (&(a)[0]))(((unsigned int)(a)) & ~(1 << 29))
#define OCI_BANK0(a) (typeof (&(a)[0]))(((unsigned int)(a)) & ~(1 << 25))
#define OCI_BANK1(a) (typeof (&(a)[0]))(((unsigned int)(a)) |  (1 << 25))

That's not SQ stuff. It's for controlling how the SH4's cache is accessed.

[Ian Micheal]

Thank you TapmN! I understand now thank you have it working on hardware your a Genus you know it

[Ian Micheal]

I have no idea how you come up with this or even thought of it lol

[fafadou]

You are very good @tapamN, awesome work.

[Ian Micheal]

I have been using this for years i use it few of my ports I came up with

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void dc_txr_dma_cpy(void *dest, void *src, int n)
{
	long i = n/32;
	char	*ptr=dest;


	do 
	{
		asm("ocbp @%0" : : "r" (ptr));
		ptr += 32;
	} while (-- i);

		pvr_txr_load_dma(dest, src, n,0,NULL,0);

}

[Ian Micheal]

Your SQ way is faster then pvr dma block trasnfer This is my benchmark using SDL dreamhal 1.0

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TapmN SQ ```32x32 blits (blits/sec):   3276.8  4275.57  3091.32   4371.4 ```

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 ``` Pvr DMA 32x32 blits (blits/sec):  3056.72  3934.68  2868.35  3927.13 ```

[KmusDC]

https://youtu.be/2r9Dkiq2-IY

[dcsteve]

Look 8 minutes into that video. Contra Hard Corp is perfect. Sound and drums are spot on crystal clear.