[Techtoolslist] EPROM Emulator Questions

[John Robertson]

One could make an emulator using a Raspberry Pi:

https://www.sbprojects.net/projects/pi-epsim/

All you need is to make a PCB using KiCad or similar.

Pis are pretty cheap, and I suspect you could compress the design onto a 
blob that fits on the UUT socket.

John :-#)#

On 2019/07/19 8:00 a.m., Jess Askey wrote:
> My vision is that I could have 8 of them plugged into all the EPROM sockets on a board like this..  😊  Then I can live debug!
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> [cid:image002.jpg at 01D53E10.77CC3C50]
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> -----Original Message-----
> From: Techtoolslist<techtoolslist-bounces at flippers.com>  On Behalf Of Phillip Eaton
> Sent: Thursday, July 18, 2019 11:24 PM
> To: Technical Tools Mail List<techtoolslist at flippers.com>
> Subject: Re: [Techtoolslist] EPROM Emulator Questions
>
>
>
> We had something very similar at my company in the 90s, it was a bit smaller black grey potted block with an rs232 cable sticking out.
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> Compared with the Dataman S3 and S4 we had, it was just as fast to use for emulation and much cheaper.
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> I'd probably buy one if they were available again at the right price, but I don't have the capacity/capability to help create one unfortunately.
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> On Fri, 19 Jul 2019, 05:03 Jess Askey, <jess at askey.org<mailto:jess at askey.org>> wrote:
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>> Here is a picture of it and the innards... there is an older CPLD on
>> the other side of the PCB and it looks like it just writes the binary
>> content to the RAM (shown) and then it runs free with the ability to
>> monitor what is going on. The software supports the standard 24/28/32
>> pin configurations so you can make it work in anything from a 2716 up
>> to like a 27C010. I tried to get ahold of John Olsen who ran Itasca
>> (according to my instruction pamphlet) but he is no where to be found.
>> It's not terribly complicated. The plastic body is cheaply available.
>> [cid:image001.png at 01D53DAC.12AC7920]
>> -----Original Message-----
>> From: Techtoolslist <techtoolslist-bounces at flippers.com<mailto:techtoolslist-bounces at flippers.com>> On Behalf Of
>> Jess Askey
>> Sent: Thursday, July 18, 2019 8:40 PM
>> To: Technical Tools Mail List <techtoolslist at flippers.com<mailto:techtoolslist at flippers.com>>
>> Subject: [Techtoolslist] EPROM Emulator Questions
>> John's AdCOM question got me thinking a little bit....
>> So I have an old Itasca Systems NoROM Eprom emulator, it is sorta a
>> genius little device because it is literally a small black 'Extended 32-Pin DIP'
>> and it only sticks up about 1.5 Inches. It has a Serial Port built in
>> with an RJ-12 (6/8Pin?) so the cable is lightweight. They stopped
>> making it in
>> 2000 or so and I really just want to make more of them (functionally).
>> Some improvements would be...
>> 1. Switch to USB + daisy chain so you can literally have dozens of
>> these on a PCB if really needed.
>> 2. An improved interface for sending data to the device(s) 3. Nice in
>> place debugging and sniffing
>> Anyone interested in working on a project like this with me? I can do
>> the software side but Im not really there on the FPGA end. I have good
>> details on the packaging of the ITASCA one and I can post pics if you
>> want. They no longer make it or are in existence so I don't want to
>> duplicate it per se, just build something with core functionality in the same form factor.
>> Email me if interested....jess at askey.org<mailto:jess at askey.org<mailto:jess at askey.org%3cmailto:jess at askey.org>>
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