Reply 60 of 72, by weedeewee
retardware wrote on 2021-10-17, 19:07:I do not find it anymore in my history, and Kontron seems to have redone their site.
It was mentioned in an article about a particular board, with BIOS screens etc how ISA stuff gets set up, including IRQs and DMA.The only thing I still found is this whitepaper: https://www.kontron.com/resources/collateral/ … paper_pc104.pdf
They talk about ISA starting page 3. How they specifically chose the amd A55E chipset/hub for the integrated PCI controller allowing access to the lower memory map and configured to " have all unused PCI
cycles are mapped to ISA" and on page 6 there is mention of the implementation of Distributed DMA to get the ISA DMA working, allowing configuration in the BIOS.
Seems to be a system from around 2011.
Very interesting read.
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