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Re: Dosbox composite mode not working for tweakmodes

I have tested Dosbox-X for the DMA issue in Crystal Dream. The Goldplay workaround detects what the demo tries to do with DMA, but it doesn't fix the issue... It stops after playing for about 1 second. Small update: originally I thought the problem was PIC-related, since you get the following …

Re: Dosbox composite mode not working for tweakmodes

Well, yes, I'd have to look into composite some more. There's this huge discussion thread on it, also discussing proper support for all palettes. I don't think that went into the mainline of Dosbox yet... certainly not yet in the latest release (0.74). But with all these huge threads it's difficult …

Re: A modern DOS Quake engine by Qbism

I wonder how well a C compiler will work with code like this. The texture addressing can be done quite efficiently in assembly. If you don't modify the assembly version, chances are, your optimizations work, but are barely enough to win back the time wasted by the C compiler in the innerloop. An …

Re:

Well that really depends. Some cards, like the S3 Vision 928 based Spea Mercury requires to have IRQ enabled such that Windows DCI acceleration works. Also PCI cards and newer use by default an IRQ. With "regular PC videocards" I meant the classic MDA/Hercules/CGA/EGA/VGA (the original IBM/Hercules …

Dosbox composite mode not working for tweakmodes

I was experimenting with tweakmodes in CGA, and found that composite mode apparently had some hardcoded width value, since the scanlines were shifted. I have located the bug in vga_draw.cpp. In the function VGA_CheckScanLength(void), there is the following code: case M_CGA16: vga.draw.address_add=80 …

Re: XT computer VGA IRQ

IRQ stands for Interrupt Request. An interrupt is a signal that hardware can send to well, interrupt the CPU, so that it can process the request from the hardware (such as incoming data, or signaling that a certain operation is complete or such). Regular PC videocards don't use interrupts. All …

Re: Old Finnish dos game

Does someone happen to know how to make this sigma in dosbox? Normal alt + something commands haven't worked so far. Copy-paste from Microsoft Word didn't work either. You probably need to select the proper codepage. MS-DOS predates unicode and all those fancy character sets. By default it starts …

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