Data I/O Series 22 EPROM Programmer help

From: Ian Primus <ian_primus_at_yahoo.com>
Date: Mon Oct 13 08:04:33 2003

On Monday, October 13, 2003, at 02:44 AM, Tothwolf wrote:

> On Sun, 12 Oct 2003, Ian Primus wrote:
>
>> I have an ancient Data I/O Series 22 programmer that I have been
>> attempting to get working. I have the manual, and I managed to get it
>> to
>> power up.
>
>> I connected a VT220 terminal, and have been able to control the
>> programmer (to an extent) from the terminal. I can type the commands
>> for
>> copy, etc. But, the manual states that I should get some feedback on
>> the
>> terminal screen, as well as on the programmer's readout.
>
> Does the programmer want hardware flow control?

The manual indicates that hardware handshaking is an option. I have
tried setting the terminal to "No Xoff", and have used different
cables, including a 4 wire simple hardware handshake-less cable.

>> Has anyone had any experience dealing with an EPROM programmer like
>> this? What format is the data transferred in, and how can I
>> communicate
>> with the programmer from the computer. The manual is pretty cryptic
>> about it, and mentions that the programmer is capable of sending and
>> receiving data in no less than 20 formats, none of which seem like
>> anything I have heard of before.
>
> The manual is probably referring to the format of the data you wish to
> program into a chip. I usually just use a raw binary format unless I
> need
> something else for some reason.
>
>> What is the 'standard' method of transferring data two and from a
>> serial
>> EPROM programmer? Should I be able to see data on a terminal if I dump
>> the data to the serial port, or is it in some non-ASCII format that
>> the
>> terminal (and Linux) can't render? I am lost here. Any suggestions
>> would
>> be appreciated.
>
> There may not really be any one "standard" way of transferring data
> to/from
> programmers, but a common method is kermit with a terminal program on
> the
> host computer.
>
> -Toth

The more I tinker with this, the more I am suspecting a hardware
problem. While trying to revive the power supply, I was measuring
voltages that were pretty far off, all of them too low. Now, the power
supply seems to have stabilized, and the voltages are consistently
close to correct. They are a fuzz low, but it's within the
specifications that the manual gives. (i.e. 15 volts is about 14.8
volts, but it's close enough). I measured voltages at the 1488 and 1489
chips, and they are just about what the data sheet says is nominal
(Nominal is 9V, and -9v, I'm reading about 8.9v and -8.89v). But, from
the looks of the solder and some residual flux on the top of the board,
it almost looks like the 1488 has been replaced before. If this chip is
bad, I would assume that it would prevent me from seeing any output,
but the input would still work, since the 1489 is obviously
functioning. If I feel adventurous later this afternoon, I think I am
going to try to desolder the 1488 and replace it with a socket. I know
I have another 1488 or two kicking around here, so I'll see if that
does any good.

Ian Primus
ian_primus_at_yahoo.com
Received on Mon Oct 13 2003 - 08:04:33 BST