[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [N8VEM-S100:3186] Re: GAL's and PALASM

To: n8vem-s100@googlegroups.com
Subject: Re: [N8VEM-S100:3186] Re: GAL's and PALASM
From: David Riley <frave...@gmail.com>
Date: Tue, 22 Apr 2014 22:48:45 -0400
Authentication-results: gmr-mx.google.com; spf=pass (google.com: domain of frave...@gmail.com designates 2607:f8b0:400d:c00::234 as permitted sender) smtp.mail=frave...@gmail.com; dkim=pass head...@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; bh=uwkE0w3OFA17F+c1OuOK79xhsPHFdzyp/hMOMbGDosU=; b=HA7zxw1y5L2+e2XqG3v5noFjIMewH2c9wyNCywq5Yf4e8Z+tbbheXspwoEG/hm3i7/ 32YZZb2+hVZcOvHT9J5r7B9Gjnv2VlE4sjHcwhsyai2Mx+dXUjLm0qGcq3bNGYxkQR/W 7TqEEH1bkvuqcPLV7RCRZFSqxsupwAz1Mm5D3IqrD3nxETozt2XBC5n2hmhaD4opj/Gc JDoFWJEfjXpzKnL06YmG6xtDX7NpcnDoejVomynOgq+E8WisdNTO4gMis+kmUWmSpcke e+Kb4ZwZcOqmInori8LXTc3cbf2gNakZShoihR0T4O+w+hkw9ds5BZkxHUMeTzlEbkxf 83NQ==
In-reply-to: <1b8bb5f8-c255-4725-b03b-e565b9d1d10b@googlegroups.com>
References: <c2d2c7b9-8df4-438b-a9c4-bc4286bc66a2@googlegroups.com> <ccd746f7-8e54-4c4c-9345-3d17da1d2f66@googlegroups.com> <000001cf5cc9$f59d6ab0$e0d84010$@vitasoft.org> <1b8bb5f8-c255-4725-b03b-e565b9d1d10b@googlegroups.com>

On Apr 22, 2014, at 10:30 PM, nbreeden wrote:

> I however ran into issues with the AMD parts. If I add a NOT (IE: OUTP1 = /INP1 + INP2) it compiles fine however the part doesn't work on the breadboard; the outputs stay high. Removing the NOT fixes the issue. Note that the part verifies OK in the programmer.
> 
> I'm wondering if I need to pick a different part in PALASM? This might be an issue with the fitter not providing the right JED data for the AMD part?

This may be a bit labor intensive, but you can always look at the bitfile and compare it against the fuse maps available in the datasheet.  GALs are relatively simple devices to understand; you may need to cook up a quick Python script or the like to pull out individual fuse bits if you don't want to be doing a lot of mental math and poking around in a hex editor.

Basically, it's possible that it's just generating the wrong fuse values for the part.

- Dave

References:
- GAL's and PALASM
  - From: monahanz <mon...@vitasoft.org>
- Re: GAL's and PALASM
  - From: nbreeden <nbre...@me.com>
- RE: [N8VEM-S100:3116] Re: GAL's and PALASM
  - From: "John Monahan" <mon...@vitasoft.org>
- Re: [N8VEM-S100:3116] Re: GAL's and PALASM
  - From: nbreeden <nbre...@me.com>

Prev by Date: Re: Group Purchase of “V2-MSDOS Support Board”
Next by Date: Re: [N8VEM-S100:3183] Re: Group Purchase of "V2-MSDOS Support Board"
Previous by thread: Re: [N8VEM-S100:3116] Re: GAL's and PALASM
Next by thread: RE: [N8VEM-S100:3186] Re: GAL's and PALASM
Index(es):
- Date
- Thread