Envelope-to: craig@sbc-85.com
Delivery-date: Wed, 06 Mar 2024 16:51:24 -0600
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From: "Howard Moulton Jr." <hwrdmltn@gmail.com>
Date: Wed, 6 Mar 2024 17:51:10 -0500
Message-ID: <CACZjXMoDRAE0WOcRj9PXQEmXvmPZRzGYNg1fdtzQTKFbSs6skg@mail.gmail.com>
Subject: Re: Private message regarding: Free for the postage "Add a serial
 port to a PROM socket" 2K version, bare board
To: craig@sbc-85.com
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Ok, I'll keep looking, thanks.

Howard

On 3/6/24, craig@sbc-85.com <craig@sbc-85.com> wrote:
> Thanks for the update Howard.  I send out 2 or 3 that same day and none h=
ave
> shown up so far.  You are the furthest away, but still... it has been a
> week.
> What I get for not using tracking.  Keep me updated and if they don't sho=
w
> by Monday I can refund your paypal.
>
> Regards
> craig
>
> -----Original Message-----
> From: Howard Moulton Jr. <hwrdmltn@gmail.com>
> Sent: Wednesday, March 6, 2024 11:19 AM
> To: craig@sbc-85.com
> Subject: Re: Private message regarding: Free for the postage "Add a seria=
l
> port to a PROM socket" 2K version, bare board
>
> Hey Craig,
>
> As of today, no show.
>
> Howard
> On 3/4/24, craig@sbc-85.com <craig@sbc-85.com> wrote:
>> Hi Howard,
>>
>> Did these show up?
>>
>> -----Original Message-----
>> From: Craig Andrews <andrewsofbg@gmail.com>
>> Sent: Tuesday, February 27, 2024 11:23 AM
>> To: Howard Moulton Jr. <hwrdmltn@gmail.com>
>> Subject: Re: Private message regarding: Free for the postage "Add a
>> serial port to a PROM socket" 2K version, bare board
>>
>> Hi Howard. I will drop in the mail this afternoon.
>>
>> Regards
>> Craig
>>
>>> On Feb 27, 2024, at 10:17=E2=80=AFAM, Howard Moulton Jr. <hwrdmltn@gmai=
l.com>
>>> wrote:
>>>
>>> =EF=BB=BFThanks Craig, my address is:
>>>
>>> Howard Moulton
>>> 54 Orleans St. Apt. 302
>>> Boston, MA 02128
>>>
>>> Thanks again, W1ARQ Howard
>>>
>>>
>>>> On 2/27/24, craig <andrewsofbg@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> Please send your mailing address.
>>>> You can PayPal the $1.25 for postage to andrewsofbg@gmail.com
>>>>
>>>> Regards
>>>> Craig
>>>>
>>>>
>>>>
>>>> On Tuesday, February 27, 2024 at 7:32:26=E2=80=AFAM UTC-8 hwrdmltn wro=
te:
>>>>
>>>> Ok, I'll byte, if no one else wants it. I love exploring
>>>> undocumented boards anyway, so I can add it to my arsenal of the
>>>> 9010a and the Agilent 1672G. Let me know, Thanks.
>>>>
>>>>> On 2/26/24, craig <andre...@gmail.com> wrote:
>>>>> I am fielding the same questions about these boards so it may be
>>>>> worth adding to this post.
>>>>> This is version 1.1 for 2K PROMs only (e.g., 1702As). There are
>>>>> some silkscreen mistakes that have been bugging me and maybe some
>>>>> other minor changes as noted in the user manual linked earlier.
>>>>> I am only tossing away these v1.1 of the 2K PROM version. Sorry,
>>>>> but I do
>>>>>
>>>>> not have any extras of the *other *version which handles 2708 and
>>>>> larger PROMs.
>>>>>
>>>>> These little adapter boards are an extremely powerful tool, but
>>>>> they are *not
>>>>> * plug-and-play. Especially when used for diagnostics and reverse
>>>>> engineering of undocumented systems.
>>>>>
>>>>> Once the system is up and running, bit banging out this adapter is
>>>>> as
>>>> easy
>>>>> as any other serial device. I have a number of 1702 based systems
>>>>> where these adapters are the primary means of communication.
>>>>>
>>>>> However, when using for reverse engineering or diagnostics, it is a
>>>>> bit
>>>> of
>>>>> an effort. For example, in 254 bytes of ramless code it is pretty
>>>>> much impossible to implement autobaud and still accomplish anything
>>>>> useful.
>>>>> That is even tight in a 2708. So my first 1702 *just *determines
>>>>> the bit delay value needed to bit bang the serial port. That uses
>>>>> ramless code that depends on nothing, and spits out the appropriate
>>>>> bit delay value to
>>>>>
>>>>> the terminal. Then *that *bit delay value needs to be programmed
>>>>> into the
>>>>>
>>>>> *next
>>>>> *EPROM that, again, uses RAMless code to map out the system RAM,
>>>>> and a third 1702 that just maps out the other PROM sockets. (Of
>>>>> course, the
>>>> code
>>>>>
>>>>> also depends on the processor so the 1702A library gets pretty big
>>>>> pretty
>>>>>
>>>>> quickly and i am always having to recycle 1702s when i need a
>>>>> different
>>>> bit
>>>>>
>>>>> rate than i already have.)
>>>>>
>>>>> Finally, once i have the complete RAM and PROM maps, then this
>>>>> becomes a simple adapter. At that point, I use it as a bootloader
>>>>> to download
>>>> binary
>>>>>
>>>>> files and as the primary COM port. The one in the photo for example
>>>>> is
>>>> off
>>>>>
>>>>> an intellec 8... just hook it up, turn it on, set the baud rate and
>>>>> start
>>>>>
>>>>> sending intel hex files. But getting to that point is not for the
>>>>> faint hearted and certainly requires the ability to program 1702s.
>>>>>
>>>>> let me know if there are other question.
>>>>> thanks
>>>>> craig
>>>>>> On Monday, February 26, 2024 at 1:04:01=E2=80=AFPM UTC-8 craig wrote=
:
>>>>>
>>>>>> This is a very niche item. I am throwing away a previous version
>>>>>> (silkscreen error)--- It plugs into a 2K PROM socket and creates a
>>>>>> bidirectional TTL serial port. It moves the existing PROM over to
>>>>>> a ZIF socket so all but the last two prom addresses are still
>>>>>> available. I use
>>>>>>
>>>>>>
>>>>>> them for diagnostics on systems without a serial port, for
>>>>>> bringing up boards I know nothing about, and just to add a serial
>>>>>> port to systems without one.
>>>>>>
>>>>>> See here:
>>>>>>
>>>> https://bitsofthegoldenage.org/documentation/2k-prom-to-serial-adapt
>>>> e
>>>> r-documentation/
>>>>
>>>>>>
>>>>>> I think USPS postage for a 1st class "non-bendable" envelope is
>>>>>> $1.25 Let me know if interested.
>>>>>> [image: 1702 to serial adapter v1.1 (small).jpg]s
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> You received this message because you are subscribed to the Google
>>>>> Groups
>>>>>
>>>>> "S100Computers" group.
>>>>> To unsubscribe from this group and stop receiving emails from it,
>>>>> send an
>>>>>
>>>>> email to s100computer...@googlegroups.com.
>>>>> To view this discussion on the web visit
>>>>>
>>>> https://groups.google.com/d/msgid/s100computers/84972290-4e09-48e3-87e=
b-f86390e335f3n%40googlegroups.com.
>>>>
>>>>
>>>>>
>>>>
>>>>
>>
>>
>
>