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These datasheets were kindly scanned in from the original paper documentation produced by Acorn in the late 1980s. Also included is the VIDC20, the graphics controller chip from the RiscPC era.
The scans were then converted to PDF form for download below. Many thanks to everyone who helped in getting these
historical resources online. If you have a problem with any of this material being online, contact us immediately.
The chipset described below formed the basis of the hardware driving modern RISC OS during the Acorn era, from
the A310 to the RiscPC.