For Sale: 27C400 EPROM emulators (beta) issue D

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derkom
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by derkom » Wed Jan 29, 2020 11:05 am

Received mine up in the arctic wilderness today. Thanks!

Squirrel61
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by Squirrel61 » Sat Feb 01, 2020 9:27 pm

Mine arrived today. I soldered some header pins on the USB connection points and connected a cable made from an old keyboard's USB cable. The menu system seems to be working fine, including programming with verify.

Tomorrow I'll dig up an A500 board and test if it is also working as an EPROM, but I have no doubts.

Thanks a lot Chris!

dalek
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by dalek » Sun Feb 02, 2020 12:51 pm

Received mine just before the weekend - got a chance to test it today :)

At first I used a long poor quality cable and had issues with USB3 and programming certain roms (diagrom). Switched to a much shorter better quality cable and all is good!

Not sure if you are still taking feature requests, but my other switcher "solution" is Keir's and it supports a buzzer which will sound a certain number of beeps depending on which slot is selected. Could you give the spare pin the ability to do that?

Great quality btw, loving it!

terriblefire
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by terriblefire » Sun Feb 02, 2020 2:10 pm

I'm completely struggling with cabling. My pc isnt anywhere near the bench so motherboard headers arent useful.

basically i cant use it without some kind of cable to program it with.
———
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cmorley
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by cmorley » Sun Feb 02, 2020 8:36 pm

terriblefire wrote:
Sun Feb 02, 2020 2:10 pm
I'm completely struggling with cabling. My pc isnt anywhere near the bench so motherboard headers arent useful.

basically i cant use it without some kind of cable to program it with.
Motherboard headers would be fine for installing in a computer case then a long A-A cable.

I use a standard USB micro cable and a cheap adapter - either solder them on or with pins.
viewtopic.php?f=29&t=2485&p=32429#p32427

Squirrel61
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by Squirrel61 » Mon Feb 03, 2020 10:31 am

terriblefire wrote:
Sun Feb 02, 2020 2:10 pm
I'm completely struggling with cabling. My pc isnt anywhere near the bench so motherboard headers arent useful.

basically i cant use it without some kind of cable to program it with.
Maybe a USB repeater cable can help you, something like this:
https://www.ebay.co.uk/itm/5M-USB-Activ ... 2250736325

They're also available in 10m length.

cmorley
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by cmorley » Fri Mar 27, 2020 10:06 am

Royal Mail increased their prices by around 8% so new postage rates from:

£2.25 UK, £4.20 Europe, £4.90 World 1, £5.10 World 2 (sorry Oz :( )

Tracked is normally an option but not right now because my local Post Office is closed until further notice.

I'll put stuff in the post box if I go out for shopping but no trips out otherwise until the government relaxes the CV19 rules, sorry.

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rubber_jonnie
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by rubber_jonnie » Fri Mar 27, 2020 10:39 am

@cmorley I'll take one for now please, kit form.
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PaulJ
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by PaulJ » Fri Mar 27, 2020 1:30 pm

terriblefire wrote:
Sun Feb 02, 2020 2:10 pm
I'm completely struggling with cabling. My pc isnt anywhere near the bench so motherboard headers arent useful.

basically i cant use it without some kind of cable to program it with.
Just tested the io gear usb extenders with a 25 ft cable on the eprom-emulator and they worked flawlessly.
u2e.jpg
u2e.jpg (140.06 KiB) Viewed 2329 times
iog.jpg
iog.jpg (106.69 KiB) Viewed 2329 times

cmorley
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Re: For Sale: 27C400 EPROM emulators (beta) issue D

Post by cmorley » Fri Mar 27, 2020 2:28 pm

Good to know. I have a 5m USB3 extension here and I found that many of my USB peripherals (JTAG programmers and the like) refuse to work with it. Circa 5m is the limit for USB2 spec because of propogation delay IIRC.

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