Andromeda Research Labs does support this ER1400 device:
www.arlabs.com
EPROM Programmer Device Support <#>
Device support includes EPROMs, FLASH EPROMs, EEPROMs, SERIAL EEPROMs, SPI FLASH EPROMs, FRAMs, SERIAL FRAMs, BIPOLAR PROMs and MICROCONTROLLERS.
🔗 https://www.arlabs.com/device.html https://www.arlabs.com/device.html
and with these adapters - the In-Circuit reader looks particularly interesting:
www.arlabs.com
EPROM and DEVICE Programmer Technology Family Adapters and Converters <#>
Programmer adapters allow the EPROM+ system to support additional parts and packages including eeproms, serial eeproms, flash eproms and microcontrollers.
🔗 https://www.arlabs.com/adapters.html#ASEREE2_adapter https://www.arlabs.com/adapters.html#ASEREE2_adapter
John :-#)#
On 2025-04-18 8:25 a.m., John Robertson via Jukebox-list wrote:
Don,
I missed this device on the ES2 schematics, thanks for getting the background information compiled below - that is a HUGE help!
On 2025-04-18 7:37 a.m., organists1--- via Jukebox-list wrote:
According to the datasheet I pulled down from alldatasheets.com this is a rewriteable prom.
Well, as it is an EAROM - Electrically Erasable Read Only Memory - this runs in MOS technology, so it requires negative voltages relative to ground for programming and reading.
It specifies the memory retention is 10 years. If it doesn't have a battery, how can a time period of retention be specified, unless that is the supposed "wear out" period?
That is the minimum length of time the charge was expected to last on internal gates.
For programming I purchased a USB connectable TL866 unit. I do not know if it is capable of 31vdc though.
This device (TL866) does NOT like the ER1400 as able to program. The ER1400 is very old tech, no modern burner can handle it...
This unit has been updated several times since I bought mine.
http://autoelectric.cn/EN/TL866_main.html
I found UTsource has a few in used condition:
https://www.utsource.net/sch/ER1400.html
$1.84each minimum 2.
Good price!
There also for sale on eBay in the $5+ range.
https://www.ebay.com/sch/i.html?_nkw=ER1400+ic&_sacat=0&_from=R40&am...
Here is some general info I found. You'll need to translate from Dutch to English, but here is the pertinent info:
https://www.circuitsonline.net/forum/view/162626
I have here a REVOX Tuner B261 (c. 1982) which uses a Mask Programmed Philips uProcessor (type MAB 8440 P) icm an antique "kind of EEPROM" (Yype GI ER1400), seesheet, to tune to FM transmitters and store all kinds of data from the stations "permanent" in an Electronic Memory.
These CMOS primordial memory ER1400 chips are apparently described with 31V DC.
NEGATIVE 31VDC, that is the problem with modern programmers, they are all Positive to Ground based...
The trick is programming. The data sheets provides the process, and it is possible that the arlabs.com programmer can be modified to handle this device.
I'll look into it as I have a number of ancient programmers including the arlabs one.
John :-#)#
This kind of memory was apparently called an EAROM (Electrically Alterable Read Only Memory): only a thousand times can be written to a memory site and electrically they were not really reliable over the years...
Don Resor
-----Original Message----- From: NORMAN MACRAE via Jukebox-list jukebox-list@lists.netlojix.com Sent: Friday, April 18, 2025 3:18 AM To: Jukebox mailing list jukebox-list@lists.netlojix.com Cc: NORMAN MACRAE nmacrae23@btinternet.com Subject: [Jukebox-list] Re: NSM EA ROM Programming
It's an ER1400. I have a datasheet, there is no internal battery on that one. The Stamanns sell them and there is a note on their website saying to program them as detailed in the manuals. I didn't get it there though, their shop is currently closed.  According to the NSM manuals, there is a default code of all zeroes to enter the program and a one-off option to change the code which MUST then be remembered. I had no idea whether the code had been changed which is why I went the route of replacing the ROM when I couldn't access the program. I have successfully altered the program on these in the past but I have never needed to do one from scratch. Typically the problem I was expecting was a location with a corrupt entry. There is actually very little wrong with this ES2 jukebox - if I attempt to access the program and abort it (ie toggle the cabinet switch), it then it will work fine until power off. There is a guy here in the UK who only does NSMs, I have messaged him so I will let you know what he responds. It is Easter weekend so it will likey be next week (hopefully).  Norman.  _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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