XU1541 and more USB stuff
in [Commodore]
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From: Suudy on 31 Jan 2008 14:14 On Jan 30, 8:14 am, BruceMcF <agil...(a)netscape.net> wrote: > Are there any minimal-Forth-processor-on-chip soft cores for Actel > parts? I haven't seen any. But there is no reason that a Forth kernel couldn't be integrated and run on the available ARM or 8051 cores. > Oh, and 65C02 machine code cores, or is that too big? Too big? I don't think size is an issue. The issue is the availability of cores. The Actel site doesn't list any 65xx cores. It only has ARM, 8051, and the already public LEON SPARC core. And if the parts can fit the LEON or ARM, it certainly can handle a 65C02. Though Opencores has a core that supports the 6502, 65C02, and 65C816 cores. It claims to be cycle accurate with the 6502, but incomplete for 65C02. It is a micro-coded state machine, so it requires some internal ROM for the microcode. It doesn't look overly complex, and eliminating the 16450 that is included could shrink it even more. See http://www.opencores.org/projects.cgi/web/t65/overview Also, Sierra Circuit provides a 65C02 core (in addition to a bunch of the uP cores). I don't know what they charge, but it may be trivial for a pre-synthesized netlist, rather than a source-code license. Check out http://www.sierracircuit.com/ Pete |