katatsumuri (@RoboMuu) header
katatsumuri (@RoboMuu) profile picture

electric snail

Joined December 2013
Replying to @intel
@intel Why have you let the old altera.com links rot? FPGAs have long product cycles, and even obsolete parts need support. The first step to re-implementing an old design on new hardware is reproducing the design on the original hardware. altera.com/products/boards_a…
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If Intel spent a fraction of the effort they put into rebranding PDFs (don't get me started on changing the binary content of a reference PDF without revision notes) into keeping old documentation, this wouldn't be a problem.
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Luckily AMD has kept Xilinx mostly intact. I hope they continue to do so. I just wish Xilinx tools were as good as pre-Intel versions of Quartus.
A new ebay find arrived this week! GiDEL PROCe-III80-B with a mysterious PSDB_FIBER mezzanine board.
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The PSDB_FIBER mezzanine card has a SFP cage and a camera link connector. There's also a second unpopulated SFP cage footprint. As far as I can tell, the SFP should connect to a remote SFP-to-camera-link module.
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Here's the pinout for SPI FLASH + FIRMWARE header
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Every time I use these port definitions, I try to read them aloud without laughing. DIPADIP... DOPADOP... BEEP BOOP From the Xilinx RAMB36E1 port descriptions:
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I should also call out the classics RSTRAMARSTRAM and RSTREGARSTREG.
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Here's a view of the routed board in KiCad. 4 Layers from JLCPCB. I designed the address/data busses to be pin compatible with the MC68020 board I brought up last week.
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While unnecessary, I've challenged myself to route all non-power signals on two layers without vias. "This board is full of through hole parts, I shouldn't need any more holes!"
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JLCPCB 4 layer boards (up to 100mm * 100mm) are so cheap ($10.56 shipped vs $4.99) that I don't see the point of wasting time and risking signal integrity to fit power into two layers. Ground + Power planes are great!
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I find it is often easier to keep 5V CPLDs handy rather than a library of 7400 series logic. The complex buffering was needed to allow remapping pins to be compatible with both AS6C4008 (RAM) and SST39SF040 (Flash)
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A new UP2 breakout arrived. What's under that heat sink?
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Despite being out of spec, it seems to work. This is a capture of A[15:0] clocked on TSn (transaction start)
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I'm using the EPF10K70 as ROM + control, running a tight loop. The event capture above shows: 0x0200 0x0204 0x0208 0x020C 0x0210 (prefetch?) 0x0000 (idle cycle?) Here's the loop manually encoded in verilog:
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