First post, by TheLazy1
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Member
This mainly concerns a Dos/Win3.1 486 system, but is there any point?
The target disk being a 2GB compactflash drive.
Reply 1 of 5, by noshutdown
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Oldbie
i would regard this completely useless, considering a 486 cpu can only handle about 30MB/s IO bandwidth, which is far below the 133MB/s bandwidth of pci bus, thats why some people say that 486s don't meet what it takes to use a pci bus.
Reply 2 of 5, by nforce4max
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l33t
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Performance wise it is pointless unless it is caching then maybe there will be a neat little boost. Beyond that the only advantage is being able to use larger drives.
On a far away planet reading your posts in the year 10,191.
Reply 3 of 5, by Old Thrashbarg
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Oldbie
I wouldn't assume that an ATA133 card would even work at all. A lot of the PCI 486 chipsets had issues with newer cards...
Reply 4 of 5, by swaaye
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l33t++
I had a Promise SATA150 TX2 working on my MSI 486 board (SiS 497). That has 2x SATA 1 and 1x UDMA 133.
Unfortunately very few 486 chipsets properly support PCI DMA transfers to reduce CPU load. That was really what I wanted to get with a PCI card, since the onboard IDE controllers of those days were PIO-only and/or ISA-based.
Reply 5 of 5, by TheLazy1
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Member
wrote:I had a Promise SATA150 TX2 working on my MSI 486 board (SiS 497). That has 2x SATA 1 and 1x UDMA 133.
Unfortunately very few 486 chipsets properly support PCI DMA transfers to reduce CPU load. That was really what I wanted to get with a PCI card, since the onboard IDE controllers of those days were PIO-only and/or ISA-based.
Ah!
That's what I meant, I should've been more clear on the PIO vs UDMA thingy.
😁