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OpenRakis / Spice86

Reverse engineer and rewrite real mode DOS programs!
Apache License 2.0
219 stars 18 forks source link

Feature request: Extended DMA Controller emulation #247

Open maximilien-noal opened 1 year ago

maximilien-noal commented 1 year ago

The DMA Controller is sufficient for Dune, but is clearly incomplete.

maximilien-noal commented 1 year ago

A mandatory read: https://martypc.blogspot.com/2023/05/exploring-dma-on-ibm-pc.html

And here is the Intel white paper about the DMA controller: Intel-8237-dma.pdf

maximilien-noal commented 1 year ago

Notes about 'DMA 64K boundary crossings' and such:

https://www.os2museum.com/wp/pc-dos-1-1-from-scratch/