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Re: why sb emulation require virtual 86 mode

Pure hardware solution requires chipset support, and all that support is variable within old chipsets and completely absent in things past Pentium III era. For example with many chipsets, access to a chipset peripheral such as DMA controller will not be visible on PCI bus so there isn't anything to …

Re: Weird memory layout on generic Trident 9440

You get the approximate pixel clock requirement by (X res * Y res * Refresh rate Hz * blanking overhead). 1.3 is a good blanking overhead figure. The actual amount of pixels per line is longer than what is visible and there are a small handful of more lines total, the excess is blanking+sync area. …

Re: Weird memory layout on generic Trident 9440

Might have been enough video memory for 1024 x 768-24b, but I don't think the 108Mhz pixel clock in the TGUI9440-3 was powerful enough for that. I think it may have tapped out @ 1076x768-16b interlaced. https://datasheet.datasheetarchive.com/originals/distributors/Datasheets-32/DSA-639114.pdf Ok, …

Re: Yamaha YMF71x SB Pro Mixer Bug Issue Fix

At best you have to sever the MIDI TX line and add a switch to choose between onboard and WB header. Though an electronic method is also possible using a multiplexer chip and taking advantage of the fact that all WB cards connect a row of grounds together, so you can separate one of them on the host …

Re: Yamaha YMF71x SB Pro Mixer Bug Issue Fix

LIke real SBpro and Yamaha DACs for the FM chips, there is only single actual DAC which output is multiplexed to create a stereo output, and the sample & hold capapcitors hold the output steady while the other channel is being updated. Lack of those capacitors will add high freq noise on the output …

Re: Creative AWE64 CT4500 upgraded to 2MB of RAM

I don't think this will succeed, but since you most probably are not going to reuse the old chip just cut its pins off (I use a razor knife for such stuff when I must do it), then remove the pins one by one and solder in new chip. Though you could also heat the pin and then push it sideways until it …

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