| --- Log opened Sat Aug 13 00:00:23 2016 | ||
| kc5tja | Well, that sucks. The S64X7 is too big to fit even on an iCE40-HX8K device. | 01:45 |
|---|---|---|
| kc5tja | Just *barely* won't fit. | 01:45 |
| kc5tja | I can probably widdle it down to fit on an 8K device by replacing the ALU with the hand-crafted ALU I wrote a while ago. | 01:46 |
| kc5tja | And I still need to implement a 64-bit to 16-bit Wishbone bridge. | 01:46 |
| kc5tja | I'll do that tomorrow. At least what I have should work on the Xilinx chip I have. | 01:47 |
| kc5tja | Managed to get S64X7 design to fit on HX8K device; Xilinx says a lot of latches exist, so the design can still be shrunk. | 15:07 |
| ZipCPU | kc5tja: Can you point me at any good MISC papers? | 16:49 |
| kc5tja | Not really; MISC was never taken seriously by industry or academia. Everything I know about MISC came from study of the (scattered) material on ultratechnology.com website. | 17:33 |
| kc5tja | Although, there is this book, where I saw the term first used. https://users.ece.cmu.edu/~koopman/stack_computers/index.html | 17:34 |
| kc5tja | It was in reference to the MISC M17 CPU. | 17:34 |
| kc5tja | Although, my architecture is more closely related to the F21 than it is the M17. | 17:43 |
| ZipCPU | All of the MISC material I've found from Google searching, to include the M17, appears to be based around a stack machine. | 18:04 |
| ZipCPU | Is this your understanding of what a MISC machine is? | 18:05 |
| ZipCPU | Or ... perhaps accumulator based, but not register based. | 18:05 |
| kc5tja | Very nearly all MISC computers are stack architectures, and of those, almost all of those are built for Forth. | 18:33 |
| kc5tja | S64X7 is a Forth CPU, whereas my S16X4 is not. But both are MISC architectures. | 18:34 |
| kc5tja | I suppose some accumulator-based machines could fit the bill as well; PDP-8 comes to mind. I'd definitely say Data General Nova does too. | 18:35 |
| kc5tja | But, Nova is right on the edge of not being MISC. | 18:35 |
| --- Log closed Sun Aug 14 00:00:24 2016 | ||
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