Any IDE busmaster controllers for ISA?

Reply 20 of 23, by Marco

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douglar wrote on Yesterday, 21:03:

[*]Switching to a caching ISA controller will do memory mapped transfers instead of PIO transfers which can get you 4MB/s with some latency overhead when accessing data that's not in the cache.
[/list]

Sorry to get back on this. Do you have any proof of that memory mapped transfer? I couldn’t find one sign of that 😒 thank you

1) VLSI SCAMP 311 | 386SX25@TI486SXLC2-50@63 | 16MB | CL-GD5434 | CT2830| SCC-1 | MT32 | WDC160GB/7200/8MB | ~~Fast-SCSI AHA 1542CF + BlueSCSI v2/15k U320~~
2) SIS486 | 486DX/2 66(@80) | 32MB | TGUI9440 | LAPC-I

Reply 21 of 23, by mkarcher

Posted on Today, 20:27

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douglar wrote on Today, 14:17:

And the BIOS is here: http://www.bitsavers.org/pdf/siig/SIIG_CI-1050/

Thanks for posting the BIOS. This is a standard EIDE LBA BIOS, no signs of DMA anywhere. It also includes some kind of setup/low-level format program which can be invoked by calling offset 9 in that BIOS. Does the card ship with a a driver disk that contains a DMA driver?

Reply 22 of 23, by Grzyb

Posted on Today, 20:43

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Marco wrote on Today, 20:07:

douglar wrote on Yesterday, 21:03:

[*]Switching to a caching ISA controller will do memory mapped transfers instead of PIO transfers which can get you 4MB/s with some latency overhead when accessing data that's not in the cache.
[/list]

Sorry to get back on this. Do you have any proof of that memory mapped transfer? I couldn’t find one sign of that 😒 thank you

My ISA graphics - on normal, non-overclocked bus - does achieve about 4 MB/s:
Re: Fast Ethernet on ISA

Nie rzucim ziemi, skąd nasz root!

Reply 23 of 23, by douglar

Posted on Today, 21:17

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Grzyb wrote on Today, 20:43:

Marco wrote on Today, 20:07:

douglar wrote on Yesterday, 21:03:

[*]Switching to a caching ISA controller will do memory mapped transfers instead of PIO transfers which can get you 4MB/s with some latency overhead when accessing data that's not in the cache.
[/list]

Sorry to get back on this. Do you have any proof of that memory mapped transfer? I couldn’t find one sign of that 😒 thank you

My ISA graphics - on normal, non-overclocked bus - does achieve about 4 MB/s:
Re: Fast Ethernet on ISA

Right, the ISA Caching controllers transfer in a similar way to the ISA graphics cards, and that's how the ISA caching controllers get 4MB/s when reading from the cache. I can post some screen shots if you like.

It's also how FreddyV can get close to 2MB/s on his 8 bit cards or how the VLB Caching controllers get 16MB/s when reading from the cache.

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