Return-Path: Delivered-To: craig@sbc-85.com Received: from gator4254.hostgator.com by gator4254.hostgator.com with LMTP id qPQ7O3VgnWXG/wEAcizydQ (envelope-from ) for ; Tue, 09 Jan 2024 09:04:21 -0600 Return-path: Envelope-to: craig@sbc-85.com Delivery-date: Tue, 09 Jan 2024 09:04:22 -0600 Received: from mout.perfora.net ([74.208.4.196]:39335) by gator4254.hostgator.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1rNDeP-001AS5-1U for craig@sbc-85.com; Tue, 09 Jan 2024 09:04:21 -0600 Received: from [IPv6:::ffff:192.168.68.69] ([65.29.206.49]) by mrelay.perfora.net (mreueus002 [74.208.5.2]) with ESMTPSA (Nemesis) id 0M9IQC-1rTFW01J3m-00Cj77 for ; Tue, 09 Jan 2024 16:04:10 +0100 MIME-Version: 1.0 To: "craig@sbc-85.com" From: Tom Elavsky Subject: RE: SDK-85 SBC Date: Tue, 9 Jan 2024 10:04:08 -0500 Importance: normal X-Priority: 3 In-Reply-To: <771101da4296$fdf85950$f9e90bf0$@sbc-85.com> References: <764501da428b$1f06fd10$5d14f730$@sbc-85.com> <1MVujx-1rmfQv1muT-00Rmny@mrelay.perfora.net> <771101da4296$fdf85950$f9e90bf0$@sbc-85.com> Content-Type: multipart/alternative; boundary="_0299DBC4-96B3-4837-822D-410BACC02B8C_" Message-ID: <0Mfo3e-1rZGrG2A0y-00N9XD@mrelay.perfora.net> X-Provags-ID: V03:K1:YlqNKXJ67NYvTH/mvF2MkNCxE9tKC1f68EPBIz11KOcKTsIt1ND q2sYS/WktXVoNQL4aj0TqFXgQRjbrXALTr/dLQMNPRUTSwfLIx+yRsZuLM8SHGZqwd1WTsJ sk0vTu4tLmRm6rPwx/eZ43yqMBsaP9oITKkLTkb3tSXNLPDvMhPpqn+jGvKbABYqKbVoZxF TPKxgYrHpWRfUr2Qqyv1w== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:2qwiSzDcXBo=;f/7KRrIOkW8z1Qg51vleIr9OMOO Z8h9MEOnwI/Wm26F6X2HZXnAfQnkhpwv8qsiVH1JIBfEjaSda7Z1PdW3/rhCkv5vmRdzqC2Mm JMqSPbVcv25r9HMg1mMwBfBaNcnPMue4uOpmCypjZXtJGHXGgsZvftv8Om4F0+6iT02b3kAT9 3E/6/dfVvet4j1FQpUQg7JeCIiZ5SRW4ZCQU1N7PtztvQDx+Wm6OPItUYLdd5q0gJZE+PfKzD 21DNWKY596wNFvduzjnpngO6Z3pbm3OPWTeBTkUjEU8sGnhOupYNc390by6as4yk5iXZZlfXp fV2FLKXjz8ay1y8iFgPMkZiECDmqtCf6I9jJgf2QTp1EB9Lx6JAoQwBn0kC8nelpSHzYzYxt6 c8DOI5/GkNAZDg5YpyJpdSxi7Wvr76McU711rF63pW8UELc29o7IklAEYLh0+snxWHbv1USqI fT7Lz2uW732bVi1U0glJI7ZHux9qEfQ5gJBbnclUyAPTX3vN+6t73G7S9oPiXjqtYD3oGR5wX WnxsA935f3a8w5c0NbIK9YwYYnRE+9hlGwFNFuziho09OwDjbcWG3VwI4jxmP8ElwDPjJ1fcl 6YF2EOKI6fJyf2mJGBUSzXKnR/8c+DRPhN4HNh3x/MoK/UzsUSCCvX9dGWyeLOMxkEmzdOj5S nEUl+84ANchXKIXVmjF9bMxndpV0qh+q05w6Wbd2xFX0Zk5thqjq7qoItXOcDZtMiE9+VZTVw DoT72AuyJYh1WIK9yzh0FWANqVU7Q3eV3lc7yQ2NPaFwxbuSlOWycffxKKVuujIAcI8MnznPX 7owLfp6nZIekodywKqG0e0rIDtNVVreT19ciYEkRVRuocP66o4k3jhZi3nxam0QbkppBNJ8E7 Ka4j1f5dSbg+fJw== X-Spam-Status: No, score=1.0 X-Spam-Score: 10 X-Spam-Bar: + X-Spam-Flag: NO --_0299DBC4-96B3-4837-822D-410BACC02B8C_ Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Hi Craig, I=E2=80=99m in Ohio, so I was already in bed before I saw your response thi= s morning. Hopefully it is not too late to follow your recommendations. Thank you again for the clarification. This makes sense. How do I cancel = the order? I also ordered a Matt Millman's 8755 Arduino Shield and Adapter= at the same time on Tindie, which I do not want to cancel. Would that be = through a different person? I play around with Arduinos. Should I wait fo= r your response before placing a new order? I would like to order the litt= le MCS-85+ as you suggest. And a pre-programed 8755 to work with it. Whic= h 8755 would that be? Thank you for the trouble-shooting info for the two used SDK-85s I have. I= will give unseating and reseating the chips a try. They have been in stor= age for over 40 plus years. I too waited until I retired to do some of the= things I wanted to so with microprocessors. Thank you for the info on the Needham. Some where in my collection of elec= tronics, I have an old Needham. I might even have an older PC that works w= ith a parallel port. I have a newer XGceu Pro Ti866II eprom programmer, bu= t apparently it will not work with a 8755. Maybe because the 8755 needs a = higher voltage. I use it to update the firmware on some older programmable= logic controllers. And I will see about ordering some 8755s on eBay. =20 Thank you and I will wait to hear back from you before placing a new order. Tom Sent from Mail for Windows From: craig@sbc-85.com Sent: Monday, January 8, 2024 7:58 PM To: 'Tom Elavsky' Subject: RE: SDK-85 SBC Hi Tom, The EPROM for my SDK is not exactly the same code.=C2=A0 From a user=E2=80= =99s perspective it acts the same and all the main subroutine entry points = are at the same addresses, but it will not directly run in a real SDK-85.= =C2=A0 There are little things like the serial bits being inverted and need= ing to change the configuration of the display.=C2=A0 So unfortunately thes= e 8755s will only run in the SDK-85+ board.=C2=A0 You may want to cancel th= at off the order since you can download the code and program yours own when= you get the full SDK-85+ with the display going. =C2=A0Or you may want to = just start with the little MCS-85+ that just has the 8085, 8156, 8755, and = 8185 since it is a simpler build. As for your two SDKs and getting them going again=E2=80=A6.. I presume you have tried removing and reinserting all the chips from their = sockets. If these worked when put away decades ago, reseating the chips wil= l solve 90% of oxide problems.=C2=A0 I also presume that you have checked v= oltages and replaced any suspect capacitors. =C2=A0=C2=A0A problem with the= SDK is that other than the initial sign on, if the thing goes on the fritz= you never know what the display is trying to say since it is depending on = the keypad entry.=C2=A0 Over the years I have had to take the keycaps off m= y SDKs and spray them with deox because they got to where I needed to slam = them pretty hard to get a keystroke registered.=C2=A0 But I don=E2=80=99t t= hink that would cause either of your problems you are seeing. Even without = a keystroke, it should say 8085 when first powered up. Some SDK-85 diagnostic software would be handy that ran the display and key= pad through some known conditions and then allowed for a terminal to furthe= r probe the SDK.=C2=A0 If you can=E2=80=99t get yours going after a reasona= ble effort, we may look into that.=C2=A0 I think there are others with dead= SDK-85s that could use such a tool. In the mean time, we can cancel and revisit this existing order.=C2=A0 If y= ou just want a blank 8755, there are some $5 ones on ebay. Also, on ebay I noticed there was a very low cost needham EMP20 programmer = that can program 8755s (with the right personality card (which are readily = available)).=C2=A0 I think it was in the $50 range which is a steal if it h= appens to work. Regards craig From: Tom Elavsky =20 Sent: Monday, January 8, 2024 4:09 PM To: craig@sbc-85.com Subject: RE: SDK-85 SBC Hi Craig, Thank you for reaching out to me.=C2=A0 You bring up a good point.=C2=A0 I = have two used Intel SDK-85 System Design Kits.=C2=A0 I tried powering both = up.=C2=A0 The display on one does not show anything, unless a key is presse= d, then one or another 8-segment display will light.=C2=A0 The other one wh= en powered has the 8-segment digits randomly flashing around.=C2=A0 My idea= was two fold.=C2=A0 I want to try and get the two SDK-85s working, and I a= lso want to build up the SDK single board computer.=C2=A0 I ordered the Epr= om just to have for the two used SDK-85 boards.=C2=A0 And I want to build t= he eprom burner to maintain and experiment with the units.=C2=A0 So I=E2=80= =99m thinking of getting the keypad/display and also the minimal SDK-85 lat= er.=C2=A0 I hope that make sense.=C2=A0 Again, I appreciate you flagging me= . Regards, Tom Sent from Mail for Windows From: craig@sbc-85.com Sent: Monday, January 8, 2024 6:33 PM To: tom@elavsky.net Subject: SDK-85 SBC Hi Tom, I see you ordered some boards from tindie, thanks but I had a question.=C2= =A0 I noticed that you just ordered the SDK single board computer and not t= he keypad / display board.=C2=A0 The board will operate by itself as a sing= le board computer, but if=C2=A0 you are using the SDK-85 monitor you also o= rdered, that monitor will be expecting the keypad/display board.=C2=A0 If y= ou already have a keypad/display board, that is great.=C2=A0 I just wanted = to check before I sent these off since it will be cheaper to ship together = than have to come back and re-order later.=C2=A0 If you are going to write = your own software and not use the monitor, then you may not need the monito= r code in the 8755. =C2=A0=C2=A0Since you are getting matt millman=E2=80=99= s programmer, you can always program that monitor code later if you need it= . Regards craig --_0299DBC4-96B3-4837-822D-410BACC02B8C_ Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"

Hi Cr= aig,

 

I=E2= =80=99m in Ohio, so I was already in bed before I saw your response this mo= rning.=C2=A0 Hopefully it is not too late to follow your recommendations.

 

Thank you = again for the clarification.=C2=A0 This makes sense.=C2=A0 How do I cancel = the order?=C2=A0 I also ordered a Matt Millman's 8755 Arduino Shield and Ad= apter at the same time on Tindie, which I do not want to cancel.=C2=A0 Woul= d that be through a different person?=C2=A0 I play around with Arduinos.=C2= =A0 Should I wait for your response before placing a new order?=C2=A0 I wou= ld like to order the little MCS-85+ as you suggest.=C2=A0 And a pre-program= ed 8755 to work with it.=C2=A0 Which 8755 would that be?

 

Thank you for th= e trouble-shooting info for the two used SDK-85s I have.=C2=A0 I will give = unseating and reseating the chips a try.=C2=A0 They have been in storage fo= r over 40 plus years.=C2=A0 I too waited until I retired to do some of the = things I wanted to so with microprocessors.

 

Thank you for the info on the= Needham.=C2=A0 Some where in my collection of electronics, I have an old N= eedham.=C2=A0 I might even have an older PC that works with a parallel port= .=C2=A0 I have a newer XGceu Pro Ti866II eprom programmer, but apparently i= t will not work with a 8755.=C2=A0 Maybe because the 8755 needs a higher vo= ltage.=C2=A0 I use it to update the firmware on some older programmable log= ic controllers.=C2=A0 And I will see about ordering some 8755s on eBay. =C2= =A0

 

Thank= you and I will wait to hear back from you before placing a new order.

<= p class=3DMsoNormal> 

Tom

 

Sent from Mail for Windows<= /p>

 

From: = craig@sbc-85.com
Sent: Mo= nday, January 8, 2024 7:58 PM
To: 'Tom Elavsky'
Subject: RE: SDK-85 SBC

 

Hi Tom,

 

The EPROM = for my SDK is not exactly the same code.  From a user=E2=80=99s perspe= ctive it acts the same and all the main subroutine entry points are at the = same addresses, but it will not directly run in a real SDK-85.  There = are little things like the serial bits being inverted and needing to change= the configuration of the display.  So unfortunately these 8755s will = only run in the SDK-85+ board.  You may want to cancel that off the or= der since you can download the code and program yours own when you get the = full SDK-85+ with the display going.  Or you may want to just start wi= th the little MCS-85+ that just has the 8085, 8156, 8755, and 8185 since it= is a simpler build.

 

As for your two SDKs and getting them going again=E2= =80=A6..

I presume you have tried removi= ng and reinserting all the chips from their sockets. If these worked when p= ut away decades ago, reseating the chips will solve 90% of oxide problems.&= nbsp; I also presume that you have checked voltages and replaced any suspec= t capacitors.   A problem with the SDK is that other than the ini= tial sign on, if the thing goes on the fritz you never know what the displa= y is trying to say since it is depending on the keypad entry.  Over th= e years I have had to take the keycaps off my SDKs and spray them with deox= because they got to where I needed to slam them pretty hard to get a keyst= roke registered.  But I don=E2=80=99t think that would cause either of= your problems you are seeing. Even without a keystroke, it should say 8085= when first powered up.

 

Some SDK-85 diagnostic software would be handy th= at ran the display and keypad through some known conditions and then allowe= d for a terminal to further probe the SDK.  If you can=E2=80=99t get y= ours going after a reasonable effort, we may look into that.  I think = there are others with dead SDK-85s that could use such a tool.

 

In the mea= n time, we can cancel and revisit this existing order.  If you just wa= nt a blank 8755, there are some $5 ones on ebay.

 

Also, on ebay I noticed = there was a very low cost needham EMP20 programmer that can program 8755s (= with the right personality card (which are readily available)).  I thi= nk it was in the $50 range which is a steal if it happens to work.

 

Regard= s

 

craig

 

 

 

From: Tom Elavsky <tom@elavsk= y.net>
Sent: Monday, January 8, 2024 4:09 PM
To: cr= aig@sbc-85.com
Subject: RE: SDK-85 SBC

=

 

Hi Craig,

 

= Thank you for reaching out to me.  You bring up a good point.  I = have two used Intel SDK-85 System Design Kits.  I tried powering both = up.  The display on one does not show anything, unless a key is presse= d, then one or another 8-segment display will light.  The other one wh= en powered has the 8-segment digits randomly flashing around.  My idea= was two fold.  I want to try and get the two SDK-85s working, and I a= lso want to build up the SDK single board computer.  I ordered the Epr= om just to have for the two used SDK-85 boards.  And I want to build t= he eprom burner to maintain and experiment with the units.  So I=E2=80= =99m thinking of getting the keypad/display and also the minimal SDK-85 lat= er.  I hope that make sense.  Again, I appreciate you flagging me= .

 

Regards,

 

Tom

 

=

Sent from Mail for Windows

 

From: craig@sbc-85.com
Sent: Monday, January= 8, 2024 6:33 PM
To: tom@elavs= ky.net
Subject: SDK-85 SBC

 

Hi Tom,

 

=

I see= you ordered some boards from tindie, thanks but I had a question.  I = noticed that you just ordered the SDK single board computer and not the key= pad / display board.  The board will operate by itself as a single boa= rd computer, but if  you are using the SDK-85 monitor you also ordered= , that monitor will be expecting the keypad/display board.  If you alr= eady have a keypad/display board, that is great.  I just wanted to che= ck before I sent these off since it will be cheaper to ship together than h= ave to come back and re-order later.  If you are going to write your o= wn software and not use the monitor, then you may not need the monitor code= in the 8755.   Since you are getting matt millman=E2=80=99s prog= rammer, you can always program that monitor code later if you need it.=

 

Regards

craig=

 

 

= --_0299DBC4-96B3-4837-822D-410BACC02B8C_--