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Re: [B2-devel] Video in 24-bit addressing mode
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From: Simon F. <sg...@ar...> - 2017-09-10 22:33:52
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Hi. Sorry I didn't reply earlier - spam filters. :( I'm definitely using 24-bit mode. I'm building to use X11, configured in banked mode. The ROMs are assuming the framebuffer lives at the end of RAM. Moreover, the framebuffer is not aligned to a 64K bank, so the existing framebuffer banking code doesn't work. I've written a pull request that copies these writes to the framebuffer - https://github.com/cebix/macemu/pull/131. A slightly more "Basilisk-II-style" solution might be to map the framebuffer somewhere else into the 24-bit address space in 24-bit mode and tweak the ROM to write there instead, but that's beyond my knowledge. Cheers, Simon. On 21 August 2017 at 23:49, Ricky Zhang <zha...@gm...> wrote: > 1. Only virtual addressing a.k.a memory bank supports 24 bit mode. First > of all, you need to confirm you are in 24bit mode. > > 2. I assume you use SDL, the virtual addressing mode divides memory into > banks (RTFM https://github.com/cebix/macemu/wiki/Basilisk-II- > Core-Emulation-Analysis#virtual-addressing) and assign corresponding RAM, > ROM and frame buffer read/write function by map_bank function during > initialization. > > 3. I’m not sure what frame layout you use, but if you check any frame > buffer read/write function frame_host_xxx_xxx in src/uae_cpu/memory.cpp. > The mapping only applies difference between MacFrameBaseHost and > MacFrameBaseMac directly to guest Mac frame buffer address to get host > frame buffer. > > 4. I’m not sure how Macintosh guest OS handles 0xa0000000 in 24 bit > addressing. I hope someone can help us on this. > > 0530 void memory_init <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=memory_init>(void)0531 {0532 for(long i <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=i>=0; i <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=i><65536; i <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=i>++)0533 put_mem_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=put_mem_bank>(i <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=i><<16, &dummy_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=dummy_bank>);0534 0535 // Limit RAM size to not overlap ROM0536 uint32 <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uint32> ram_size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ram_size> = RAMSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMSize> > ROMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseMac> ? ROMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseMac> : RAMSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMSize>;0537 0538 RAMBaseDiff <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMBaseDiff> = (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)RAMBaseHost <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMBaseHost> - (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)RAMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMBaseMac>;0539 ROMBaseDiff <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseDiff> = (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)ROMBaseHost <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseHost> - (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)ROMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseMac>;0540 FrameBaseDiff <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=FrameBaseDiff> = (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)MacFrameBaseHost <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseHost> - (uintptr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=uintptr>)MacFrameBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseMac>;0541 0542 // Map RAM and ROM0543 if (TwentyFourBitAddressing <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=TwentyFourBitAddressing>) {0544 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&ram24_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ram24_bank>, RAMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMBaseMac> >> 16, ram_size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ram_size> >> 16);0545 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&rom24_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=rom24_bank>, ROMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseMac> >> 16, ROMSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMSize> >> 16);0546 } else {0547 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&ram_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ram_bank>, RAMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=RAMBaseMac> >> 16, ram_size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ram_size> >> 16);0548 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&rom_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=rom_bank>, ROMBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMBaseMac> >> 16, ROMSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=ROMSize> >> 16);0549 }0550 0551 // Map frame buffer0552 switch (MacFrameLayout <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameLayout>) {0553 case FLAYOUT_DIRECT <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=FLAYOUT_DIRECT>:0554 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&frame_direct_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=frame_direct_bank>, MacFrameBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseMac> >> 16, (MacFrameSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameSize> >> 16) + 1);0555 break;0556 case FLAYOUT_HOST_555 <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=FLAYOUT_HOST_555>:0557 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&frame_host_555_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=frame_host_555_bank>, MacFrameBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseMac> >> 16, (MacFrameSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameSize> >> 16) + 1);0558 break;0559 case FLAYOUT_HOST_565 <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=FLAYOUT_HOST_565>:0560 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&frame_host_565_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=frame_host_565_bank>, MacFrameBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseMac> >> 16, (MacFrameSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameSize> >> 16) + 1);0561 break;0562 case FLAYOUT_HOST_888 <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=FLAYOUT_HOST_888>:0563 map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(&frame_host_888_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=frame_host_888_bank>, MacFrameBaseMac <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameBaseMac> >> 16, (MacFrameSize <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=MacFrameSize> >> 16) + 1);0564 break;0565 }0566 }0567 0568 void map_banks <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=map_banks>(addrbank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=addrbank> *bank, int start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start>, int size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=size>)0569 {0570 int bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr>;0571 unsigned long int hioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=hioffs> = 0, endhioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=endhioffs> = 0x100;0572 0573 if (start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start> >= 0x100) {0574 for (bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> = start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start>; bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> < start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start> + size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=size>; bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr>++)0575 put_mem_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=put_mem_bank> (bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> << 16, bank);0576 return;0577 }0578 if (TwentyFourBitAddressing <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=TwentyFourBitAddressing>) endhioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=endhioffs> = 0x10000;0579 for (hioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=hioffs> = 0; hioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=hioffs> < endhioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=endhioffs>; hioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=hioffs> += 0x100)0580 for (bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> = start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start>; bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> < start <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=start>+size <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=size>; bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr>++)0581 put_mem_bank <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=put_mem_bank>((bnr <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=bnr> + hioffs <http://192.168.2.213/lxr/ident/bii?v=15Aug2017&_i=hioffs>) << 16, bank);0582 }0583 0584 #endif /* !REAL_ADDRESSING && !DIRECT_ADDRESSING */ > > > > On Aug 21, 2017, at 5:33 PM, Simon Frankau <sg...@ar...> wrote: > > Hi. > > I'm trying to use Basilisk II to emulate a Mac Classic - I want to emulate > a Mac running in 24-bit mode. My attempts to make it work using unpatched > source didn't work. I'm not sure how it's intended to work, but I saw: > > const uint32 MacFrameBaseMac = 0xa0000000; > > in cpu_emulation.h. In 24-bit mode this aliases with 0x000000, and on the > Classic the framebuffer is expected to live at 0x3fa700. > > Given this, I'm not sure how the display is expected to work in Basilisk > II for a Classic or other 24-bit mode Macs. I've created a patch to make > the Classic framebuffer work (and it boots up 6.0.8 ok). However, I wanted > to check if I've missed something silly, and if there's just a flag I > should be specifying to make it work. If not, what's the appropriate way to > suggest a patch? > > Thanks, > Simon. > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot______ > _________________________________________ > basilisk-devel mailing list > bas...@li... > https://lists.sourceforge.net/lists/listinfo/basilisk-devel > > > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > basilisk-devel mailing list > bas...@li... > https://lists.sourceforge.net/lists/listinfo/basilisk-devel > > |
