Did you ever get this converter working? Did it take much work? Thanks!...
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Ethan Dicks
erd_6502
May 24, 2010 3:11 pm
... Yes. Fail. What to watch for is if your remote device can put characters on your laptop but nothing you type is received by the remote device. It's a ...
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s shumaker
traveler8811
May 24, 2010 3:03 pm
Ethan, it's a bit off the current topic but I'm curious. Have you had any experience with using laptop USB as the source (through a converter) for a serial...
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Ethan Dicks
erd_6502
May 24, 2010 2:38 pm
... Most modern machines will handle "3-wire" communications just fine, but you have to tell your terminal app that you want that. Typically there is a...
364
wa9hsl
May 24, 2010 2:26 pm
Here are some things to check on the Serial port. One is that the jumpers are set correctly for RS-232. The expansion is also designed for the 20 ma current...
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rwagg@...
rwagg...
May 24, 2010 2:35 am
The Tiny Basic tests didn't pass. I bought an EPROM burner and dumped the contents of the ROM. It's not a Tiny Base ROM, I compared it to the ROM dump found...
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wa9hsl
May 23, 2010 2:06 am
Just for curiosity, why do you need to replace the existing Tiny Basic eprom? Is it not working correctly or at all? What happens when you do the monitor...
361
whipaway
May 16, 2010 12:11 am
The eprom you need is a 2716, and probably any device that can program a 2716 will be fine to use. If you are going to get into programming these devices, you...
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rwagg@...
rwagg...
May 15, 2010 11:13 pm
Thank you for the feedback, I don't know anything about creating ROMs so the more detail the better. Is there a specific PROM burner and PROM that I should...
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wa9hsl
May 13, 2010 11:07 am
There are at least two different ways that Tiny Basic was dumped in the files section. The "S1S9" format is understood by your monitor. Try this command: "P...
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whipaway
May 12, 2010 11:37 pm
You would use the image, along with an PROM programmer and a blank PROM to create a new PROM. ... From: rwagg@... <rwagg@...> Subject:...
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rwagg@...
rwagg...
May 12, 2010 10:56 pm
I see that the "image" of the EWA-3400 Tiny Basic ROM is available here, but I don't know what to do with it. I have an EWA-3400 for my ET-3400 trainer, and...
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carljenhfriends
Apr 7, 2010 1:19 pm
Maggie sent you a private message! Click here to check it out! <http://wach.zoomshare.com/files/girlrider.htm>...
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carljenhfriends
Apr 7, 2010 1:18 pm
Maggie sent you a private message! Click here to check it out! <http://wach.zoomshare.com/files/girlrider.htm>...
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Ethan Dicks
erd_6502
Apr 6, 2010 7:47 pm
... Thanks for the tip, but an inverter wouldn't be needed... just a socket stacked in another socket with certain pins missing, then pullups and pulldowns to...
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whipaway
Apr 6, 2010 7:40 pm
You won't be able to read the ROM contents with an EPROM burner directly due to the way the CS0, CS1, CS2 and CS3 are set up. Some of the logic levels are...
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Ethan Dicks
erd_6502
Apr 6, 2010 6:29 pm
... Good to know. I'll take a stab at checking combinations of those, and also check the ROM contents in an EPROM burner. Between the two, something should ...
351
Peter B. Nelson
peterbnelson
Apr 6, 2010 6:24 pm
Ethan, good news. Your ET-3400 is functional with only two 2112 memory chips*. So, if you have four, you should be able to test just two at a time. By my...
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Peter B. Nelson
peterbnelson
Apr 5, 2010 9:07 pm
Yes, Deoxit is contact cleaner. I would do that procedure before bothering with anything else. -Peter...
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gbongi1
Apr 5, 2010 8:07 pm
Hi thanks for the input. I went over the troubleshooting section now I just need to execute it. Isn't Deoxite the same as Contact cleaner? I will check all the...
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kevin asato
kc6pob
Apr 5, 2010 7:24 pm
Have you checked the reset and oscillator circuits to see if they are running appropriately? 73,kevinkc6pob ... From: Ethan Dicks <ethan.dicks@...> ...
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Ethan Dicks
erd_6502
Apr 5, 2010 6:31 pm
... I don't have an ETA-3400MIO. I have a base original-rev ET-3400. It has a 6800 uP and four 2112 SRAMs. I have bins of 2114s (I used to work at a place...
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Peter B. Nelson
peterbnelson
Apr 5, 2010 5:49 pm
Ethan, Regarding the 2114 chips - doh! - I feel like a dummy for not zooming in on the picture and spotting that myself. But that's not why I'm writing... ...
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Peter B. Nelson
peterbnelson
Apr 5, 2010 4:56 pm
Doug, the parts you found in eBay are totally unrelated to our Heathkit ET-3400/A systems. They are for general industrial use, to prevent damage and fires...
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Ethan Dicks
erd_6502
Apr 5, 2010 4:50 pm
... The pictures show that the memory chips are 2114s. Those are 1Kx4, so eight of them is 4Kbytes. ... Very handy. It's tempting to whip up a small board...
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Wings
wingon695
Apr 5, 2010 4:11 pm
Hi Peter, Can you tell me the application of ETA 3400-K20-H Thermal Magnetic Circuit Breakers I saw in ebay? Thanks, Doug ________________________________ ...
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Peter B. Nelson
peterbnelson
Apr 5, 2010 4:08 pm
I had very similar problems with mine, and the solution was simple. [CAIG DeOxit Cleaning Solution Spray, 5% spray 5oz] Get a can of Deoxit (available from...
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Peter B. Nelson
peterbnelson
Apr 5, 2010 3:48 pm
These are pretty rare, coming up for auction only a few times per year. In case anyone is interested, the eBay auction number is 230458241479. ...
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whipaway
Apr 3, 2010 9:07 pm
In the files section, under ET-3400 Assembly Manual, ET3400 Part 3 of 4, pages 93 thru 106 is a troubleshooting procedure with charts. ... From: gbongi1...
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gbongi1
Apr 3, 2010 5:57 pm
Hi I have been looking through the "files" section and have yet to find a document containing any troubleshooting mechanisms. I have had my 3400 for some time...
