http://tech.groups.yahoo.com/group/ET-3400/ Heathkit ET-3400 Resources Wed, 06 Jan 2010 07:23:42 GMT eytankaziberdov http://tech.groups.yahoo.com/group/ET-3400/message/242 http://tech.groups.yahoo.com/group/ET-3400/message/242 I know using a GAL really does feel kinda "perverse" on old stuff, I always get that same feeling, which is why I always make 2 schematics for anything I've Mon, 04 Jan 2010 20:11:12 GMT granz_consult http://tech.groups.yahoo.com/group/ET-3400/message/241 http://tech.groups.yahoo.com/group/ET-3400/message/241 Dan, Yeah, I do plan to wire it up. At least in individual sections at a time, that will let me know about my logic. eytankaziberdov suggested a GAL, and Mon, 04 Jan 2010 20:06:45 GMT granz_consult http://tech.groups.yahoo.com/group/ET-3400/message/240 http://tech.groups.yahoo.com/group/ET-3400/message/240 I did think about using a GAL, but something seems kinda "perverse" about using a GAL in 1970's technology - extra strange, since I had no trouble with EEPROM Mon, 04 Jan 2010 19:40:47 GMT jkarpy@... http://tech.groups.yahoo.com/group/ET-3400/message/239 http://tech.groups.yahoo.com/group/ET-3400/message/239 I am looking for someone to repair my ET-3400A. My son is just starting with Microprocessors and I just don't have time to repair it. I think the EPROM code is Mon, 04 Jan 2010 17:03:30 GMT hopperdhh@... http://tech.groups.yahoo.com/group/ET-3400/message/238 http://tech.groups.yahoo.com/group/ET-3400/message/238 Hi Art, This looks like a very useful addition to the ET3400. I think you should hand wire it before you commit to a board layout -- unless you think it would Mon, 04 Jan 2010 16:52:20 GMT eytankaziberdov http://tech.groups.yahoo.com/group/ET-3400/message/237 http://tech.groups.yahoo.com/group/ET-3400/message/237 Nothing for schematic capture out there that doesn't require an install.. there is a simple PCB layout tool, that for the life of me I can't remember it's name Mon, 04 Jan 2010 04:04:17 GMT Whipaway http://tech.groups.yahoo.com/group/ET-3400/message/236 http://tech.groups.yahoo.com/group/ET-3400/message/236 Hi Sean, welcome to the group. The ET-3400 was the original, and as time went on an improved version was made called the ET-3400A. One motivation for Heathkit Mon, 04 Jan 2010 03:16:47 GMT kk4ts_slash_7 http://tech.groups.yahoo.com/group/ET-3400/message/235 http://tech.groups.yahoo.com/group/ET-3400/message/235 Hi, I'm Sean, and I'm new to the group. I was wondering if anybody could tell me what the differences are and what Heathkit's motivations were for changing the Sun, 03 Jan 2010 23:08:58 GMT granz_consult http://tech.groups.yahoo.com/group/ET-3400/message/234 http://tech.groups.yahoo.com/group/ET-3400/message/234 Hey everyone, I have just posted a schematic for the upgrade I mentioned quite a while back. This is to give: * 2 blocks of 4K EEPROM for MikBUG (or SWTBUG, Sun, 03 Jan 2010 22:59:34 GMT http://tech.groups.yahoo.com/group/ET-3400/message/233 http://tech.groups.yahoo.com/group/ET-3400/message/233 Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the ET-3400 group. File : /Granz/ET-3400 Mon, 21 Dec 2009 21:53:48 GMT Vic Blosser http://tech.groups.yahoo.com/group/ET-3400/message/231 http://tech.groups.yahoo.com/group/ET-3400/message/231 I'm not sure what would be best myself.  I've noticed that there are files with .s19 extension (Motorola) .hex (Intel) ASCII and .bin (binary).  Also, Mon, 21 Dec 2009 20:55:13 GMT Stuart Johnson http://tech.groups.yahoo.com/group/ET-3400/message/230 http://tech.groups.yahoo.com/group/ET-3400/message/230 Correction: The version of TASM I used was a DOS program; it would run under MSDOS, IBMDOS, etc. The current version of TASM (3.2) is compiled with Visual C Mon, 21 Dec 2009 20:36:38 GMT Ethan Dicks http://tech.groups.yahoo.com/group/ET-3400/message/229 http://tech.groups.yahoo.com/group/ET-3400/message/229 ... Another good cross assembler is AS - http://john.ccac.rwth-aachen.de:8000/as/ I found it because I was hunting for something that could handle the Mon, 21 Dec 2009 20:10:41 GMT Stuart Johnson http://tech.groups.yahoo.com/group/ET-3400/message/228 http://tech.groups.yahoo.com/group/ET-3400/message/228 You might want to check out TASM (for DOS, runs under Windows in a DOS box), found at: Squak Valley Software - Telemark Cross Assembler (TASM) Home Page As far Mon, 21 Dec 2009 19:21:19 GMT Stuart Johnson http://tech.groups.yahoo.com/group/ET-3400/message/227 http://tech.groups.yahoo.com/group/ET-3400/message/227 For Windows I use Notepad++ for text, frhed for HEX. For OS X I use TextWrangler for text and hex. All are free. Notepad++ is found at: .:: NOTEPAD++ ::.