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[67.188.113.125]) by smtp.gmail.com with ESMTPSA id p187-20020a62d0c4000000b00571cdbd0771sm1688201pfg.102.2022.11.24.14.14.11 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 24 Nov 2022 14:14:12 -0800 (PST) From: Michael Kamprath Content-Type: multipart/alternative; boundary="Apple-Mail=_156569BE-B03F-400D-A5B9-6F2580C4F6DA" Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.200.110.1.12\)) Subject: Re: MCS-85 minimum system board Date: Thu, 24 Nov 2022 14:14:00 -0800 References: <5A6C205C-F883-48A4-9E23-0E1FE59B8840@sbc-85.com> <27f401d8ffa2$be9cc6c0$3bd65440$@sbc-85.com> To: craig@sbc-85.com In-Reply-To: <27f401d8ffa2$be9cc6c0$3bd65440$@sbc-85.com> Message-Id: X-Mailer: Apple Mail (2.3731.200.110.1.12) X-Spam-Status: No, score=-0.0 X-Spam-Score: 0 X-Spam-Bar: / X-Spam-Flag: NO --Apple-Mail=_156569BE-B03F-400D-A5B9-6F2580C4F6DA Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Thanks! A couple more questions: The board layout image in the user manual makes it clear that the JP5 is = not a normal 2.54 mm pitch jumper. Could you provide some more details = on its dimensions? Diode D2 is not specified in the user manual. Would it be a simple = 1N4148 general purpose diode? Happy Thanksgiving! Michael > On Nov 23, 2022, at 5:19 PM, = wrote: >=20 > blast, I ordered the wrong footprint. the correct footprint is = SOT-753 (SOT-25) digikey 74AHCT1G04W5-7DICT-ND > =20 > =20 > From: SBC-85 >=20 > Sent: Wednesday, November 23, 2022 12:06 AM > To: Michael Kamprath > > Subject: Re: MCS-85 minimum system board > =20 > Hi Michael > =20 > Yes, the 8185-2 is a selected higher speed version if you are running = a 8085AH-2 CPU at full speed. Are you F8 ding the -2 version to be = more readily available? Makes sense since they are the most recent = version. I am not sure what versions I have since I am only running the = slower 8085A. The monitor serial delays are for 6.144MHz crystal (2400 = baud). I need to add all of that to the users manual.=20 > =20 > I have not tested the little inverter, I think I have some on order = and an test this week. The ones I ordered are SOT353 and I presume I = ordered the correct ones. I should know in the coming days when my = Digi-Key order arrives. Adding that inverter to allow the 8155 was an = afterthought so not much thought was put into it.=20 > =20 > Regards > =20 > Craig > =20 >=20 >=20 >> On Nov 22, 2022, at 11:22 PM, Michael Kamprath > wrote: >>=20 >> =EF=BB=BFThanks! >> =20 >> Got some questions: >> =20 >> What is the footprint of the 74AHCT1G04? I see it can come in a = number of different packages (including SOT-23, SOT-25, and SOT-353). >> For the retro chips, I cannot find the 8185. Instead, I can find a = P8185-2. I am assuming that it=E2=80=99s a faster version, but I thought = I=E2=80=99d check first. >> =20 >> Michael Kamprath >> =20 >>=20 >>=20 >>> On Nov 22, 2022, at 6:33 PM, > > = wrote: >>> =20 >>> Michael, >>> =20 >>> I have uploaded a first version of the user=E2=80=99s manual and the = current version of the resident monitor to the project site. please let = me know if they are not there, mistakes, etc. >>> =20 >>> thanks >>> =20 >>> craig >>> =20 >>> From: Michael Kamprath >=20 >>> Sent: Monday, November 21, 2022 6:49 PM >>> To: SBC-85 > >>> Subject: Re: MCS-85 minimum system board >>> =20 >>> Cool, thanks. No hurry, I have plenty of other projects I am = juggling. >>> =20 >>> Michael >>> =20 >>>=20 >>>=20 >>>=20 >>>> On Nov 21, 2022, at 6:47 PM, SBC-85 > wrote: >>>> =20 >>>> Hi Michael, yea that was a placeholder. I need to do the BOM for = the MCS-85+. I need to do a little bit of a manual too and upload the = current version of the monitor. Hopefully in the next couple of days, = but I keep falling back to trying to fit in the disassembler command.=20 >>>> =20 >>>> I will let you know as I get things uploaded.=20 >>>> =20 >>>> Regards >>>> =20 >>>> Craig >>>>=20 >>>>=20 >>>>=20 >>>>> On Nov 21, 2022, at 6:25 PM, Michael Kamprath = > wrote: >>>>>=20 >>>>> =EF=BB=BFThanks! >>>>> =20 >>>>> I will point out that the documentation page = = linked from your project page = has the BOM and other documentation for a "SBC-85 1Mbit = Bubble=E2=80=9D rather than the MCS-85. Where might I find the BOM for = the MCS-85+ >>>>> =20 >>>>> Michael >>>>> =20 >>>>>=20 >>>>>=20 >>>>>=20 >>>>>> On Nov 21, 2022, at 1:14 PM, > > = wrote: >>>>>> =20 >>>>>> got it, thanks. >>>>>> =20 >>>>>> From: Michael Kamprath >=20 >>>>>> Sent: Monday, November 21, 2022 12:40 PM >>>>>> To: craig@sbc-85.com >>>>>> Subject: Re: MCS-85 minimum system board >>>>>> =20 >>>>>> Sent. Thanks! >>>>>>=20 >>>>>> Sent from my iPhone >>>>>>=20 >>>>>>=20 >>>>>>=20 >>>>>>=20 >>>>>>> On Nov 21, 2022, at 12:25 PM, craig@sbc-85.com = wrote: >>>>>>>=20 >>>>>>> =EF=BB=BF >>>>>>> Thanks Michael >>>>>>> =20 >>>>>>> tracking # 9400111206213546148486 = >>>>>>> =20 >>>>>>> label was $3.67 plus $5 for the programmer board set so $8.67 >>>>>>> my paypal is andrewsofbg@gmail.com = >>>>>>> =20 >>>>>>> thanks >>>>>>> =20 >>>>>>> craig >>>>>>> =20 >>>>>>> From: Michael Kamprath >=20 >>>>>>> Sent: Monday, November 21, 2022 11:09 AM >>>>>>> To: SBC-85 > >>>>>>> Subject: Re: MCS-85 minimum system board >>>>>>> =20 >>>>>>> Sure: >>>>>>> =20 >>>>>>>> Michael Kamprath >>>>>>>> 1945 Montecito Ave >>>>>>>> Mountain View, CA 94043 >>>>>>> =20 >>>>>>> Thanks! >>>>>>> =20 >>>>>>> Michael >>>>>>> =20 >>>>>>>=20 >>>>>>>=20 >>>>>>>=20 >>>>>>>=20 >>>>>>>=20 >>>>>>>> On Nov 21, 2022, at 10:50 AM, SBC-85 > wrote: >>>>>>>> =20 >>>>>>>> Hi Michael, I guess I need your mailing address first. =20 >>>>>>>> =20 >>>>>>>> Regards >>>>>>>>=20 >>>>>>>>=20 >>>>>>>>=20 >>>>>>>>=20 >>>>>>>>=20 >>>>>>>>> On Nov 1, 2022, at 10:58 AM, Michael Kamprath = > wrote: >>>>>>>>>=20 >>>>>>>>> =EF=BB=BF >>>>>>>>> Craig, >>>>>>>>> =20 >>>>>>>>> I published my video covering the process of dumping the ROM = on the MOSTEK 3870 that is in my TEAMMATE Game Computer. I make = reference to your treatment on the F8 microprocessor. You can view my = video here: >>>>>>>>> =20 >>>>>>>>>>=20 >>>>>>>>>> >>>>>>>>>> The Vintage T.E.A.M.M.A.T.E. Game Computer - Part 1: Dumping = the ROM >>>>>>>>>> youtu.be >>>>>>>>>> =20 >>>>>>>>> =20 >>>>>>>>> Next video will be on actually programming the computer, so = using the assembler I already pointed out to you. >>>>>>>>> =20 >>>>>>>>> Thanks! >>>>>>>>> =20 >>>>>>>>> Michael Kamprath >>>>>>>>> =20 >>>>>>>>> =20 >>>>>>>>>=20 >>>>>>>>>=20 >>>>>>>>>=20 >>>>>>>>>=20 >>>>>>>>>=20 >>>>>>>>>> On Oct 12, 2022, at 6:04 PM, Michael Kamprath = > wrote: >>>>>>>>>> =20 >>>>>>>>>> Comment has been left as requested. >>>>>>>>>> =20 >>>>>>>>>>> for the life of me, I can=E2=80=99t figure out what all = these 3870 factory masked ROM buyers and sellers on ebay are doing with = these chips. the chances of finding the one masked ROM you are looking = for seems as if it is infinitesimally small. >>>>>>>>>> =20 >>>>>>>>>> I know! I wonder if anyone is even buying them. I can see the = chip recyclers just dutifully pulling them, cleaning them, organizing = them, and then selling them without much thought for what they have. But = who would buy it? >>>>>>>>>> =20 >>>>>>>>>>> I am retired so I no longer make Gantt charts, timelines, = schedules, budgets, or predictions. But it could easily be mid winter = or later before I even get to finish the projects already on my bench = and revisit the 3870 board. >>>>>>>>>> =20 >>>>>>>>>> Well, I am not quite retired yet, but I totally understand = and am in no hurry myself. If you look at my own video schedule = you=E2=80=99ll see it takes = me months to get one video out. This is all just for fun only when I = have spare time. Kids, wife, work, yard =E2=80=A6 all come first. >>>>>>>>>> =20 >>>>>>>>>>> I tried soldering a surface mount 8085 the other day and I = can=E2=80=99t believe I used to do that without glasses, let alone a = magnifier lens. >>>>>>>>>> =20 >>>>>>>>>> While I am at the point where I need multiple glasses for = different scenarios (driving, computer, reading, etc), I don=E2=80=99t = quite need them yet for soldering. It=E2=80=99s coming, I know. >>>>>>>>>> =20 >>>>>>>>>> Michael Kamprath --Apple-Mail=_156569BE-B03F-400D-A5B9-6F2580C4F6DA Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Thanks!

A couple more = questions:

  • The = board layout image in the user manual makes it clear that the JP5 is not = a normal 2.54 mm pitch jumper. Could you provide some more details on = its dimensions?
  • Diode D2 is not specified in the user manual. = Would it be a simple 1N4148 general purpose = diode?

Happy = Thanksgiving!

Michael

On Nov 23, 2022, at 5:19 PM, = <craig@sbc-85.com> <craig@sbc-85.com> wrote:

blast, I ordered the wrong = footprint.  the correct footprint is SOT-753 (SOT-25)  digikey = 74AHCT1G04W5-7DICT-ND
 
 
From: SBC-85 <craig@sbc-85.com> 
Sent: Wednesday, November 23, = 2022 12:06 AM
To: Michael Kamprath <michael@kamprath.net>
Subject: Re: MCS-85 minimum system = board
 
Hi = Michael
 
Yes, the 8185-2 = is a selected higher speed version if you are running a 8085AH-2 CPU at = full speed.   Are you F8 ding the -2 version to be more readily = available? Makes sense since they are the most recent version. I am not = sure what versions I have since I am only running the slower 8085A. =  The monitor serial delays are for 6.144MHz crystal (2400 baud). =  I need to add all of that to the users = manual. 
 
I have not = tested the little inverter, I think I have some on order and an test = this week.  The ones I ordered are SOT353 and I presume I ordered = the correct ones.  I should know in the coming days when my = Digi-Key order arrives.  Adding that inverter to allow the 8155 was = an afterthought so not much thought was put into = it. 
 
Regards
 
Craig
 


On Nov 22, 2022, at 11:22 PM, Michael Kamprath <michael@kamprath.net> = wrote:

=EF=BB=BFThanks!
 
Got some = questions:
 
  • What is the = footprint of the 74AHCT1G04? I see it can come in a number of = different packages (including SOT-23, SOT-25, and = SOT-353).
  • For the retro chips, = I cannot find the 8185. Instead, I can find a P8185-2. I am = assuming that it=E2=80=99s a faster version, but I thought I=E2=80=99d = check first.
 
Michael = Kamprath
 


On Nov 22, 2022, at = 6:33 PM, <craig@sbc-85.com> <craig@sbc-85.com> wrote:
 
Michael,
 
I have uploaded = a first version of the user=E2=80=99s manual and the current version of = the resident monitor to the project site.  please let me know if = they are not there, mistakes, etc.
 
thanks
 
craig
 
From: Michael Kamprath <michael@kamprath.net> 
Sent: Monday, November 21, 2022 = 6:49 PM
To: SBC-85 <craig@sbc-85.com>
Subject: Re: MCS-85 minimum system = board
 
Cool, thanks. = No hurry, I have plenty of other projects I am = juggling.
 
Michael
 



On Nov 21, 2022, at 6:47 PM, SBC-85 = <craig@sbc-85.com> = wrote:
 
Hi Michael, yea that was a placeholder. I need to do the = BOM for the MCS-85+.  I need to do a little bit of a manual too and = upload the current version of the monitor.  Hopefully in the next = couple of days, but I keep falling back to trying to fit in the = disassembler command. 
 
I will let you know as I get things = uploaded. 
 
Regards
 
Craig



On Nov 21, 2022, at 6:25 PM, Michael = Kamprath <michael@kamprath.net> = wrote:

=EF=BB=BFThanks!
 
I will point out that the documentation = page linked = from your = project page has the BOM and other documentation for a "SBC-85 = 1Mbit Bubble=E2=80=9D rather than the MCS-85. Where might I find the BOM = for the MCS-85+
 
Michael
 



On Nov 21, 2022, at 1:14 PM, <craig@sbc-85.com> <craig@sbc-85.com> = wrote:
 
got it, thanks.
 
From: Michael Kamprath <michael@kamprath.net> 
Sent: Monday, November 21, 2022 = 12:40 PM
To: craig@sbc-85.com
Subject: Re: MCS-85 minimum system = board
 

Sent. Thanks!

Sent from my = iPhone




On Nov 21, 2022, at 12:25 PM, craig@sbc-85.com wrote:

=EF=BB=BF
Thanks Michael
 
 
label was $3.67 plus $5 for the programmer board set so = $8.67
my paypal is andrewsofbg@gmail.com
 
thanks
 
craig
 
From: Michael Kamprath <michael@kamprath.net> 
Sent: Monday, November 21, 2022 = 11:09 AM
To: SBC-85 <craig@sbc-85.com>
Subject: Re: MCS-85 minimum system = board
 
Sure:
 
Michael = Kamprath
1945 Montecito = Ave
Mountain View, = CA = 94043
 
Thanks!
 
Michael
 





On Nov 21, 2022, at 10:50 AM, SBC-85 = <craig@sbc-85.com> = wrote:
 
<= div style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, = sans-serif;">Hi Michael, I guess I need your mailing address first. =  
 
Regards





On Nov 1, 2022, at 10:58 AM, Michael = Kamprath <michael@kamprath.net> = wrote:

=EF=BB=BF
Craig,
 
I published my video covering the process of dumping the = ROM on the MOSTEK 3870 that is in my TEAMMATE Game Computer. I make = reference to your treatment on the F8 microprocessor. You can view my = video here:
 
 
Next video will be on actually programming the computer, so = using the assembler I already pointed out to = you.
 
Thanks!
 
Michael = Kamprath
 
 





On Oct 12, 2022, at 6:04 PM, Michael = Kamprath <michael@kamprath.net> = wrote:
 
Comment has been left as = requested.
 
for the life of me, I can=E2=80=99t = figure out what all these 3870 factory masked ROM buyers and sellers on = ebay are doing with these chips.  the chances of finding the one = masked ROM you are looking for seems as if it is infinitesimally = small.
 
I know! I wonder if anyone is even buying them. I can see = the chip recyclers just dutifully pulling them, cleaning them, = organizing them, and then selling them without much thought for what = they have. But who would buy = it?
 
I am retired so I no longer make = Gantt charts, timelines, schedules, budgets, or predictions.  But = it could easily be mid winter or later before I even get to finish the = projects already on my bench and revisit the 3870 = board.
 
Well, I am not quite retired yet, but I totally understand = and am in no hurry myself. If you look at my own video schedule you=E2=80=99ll= see it takes me months to get one video out. This is all just for fun = only when I have spare time. Kids, wife, work, yard =E2=80=A6 all come = first.
 
I tried soldering a surface mount = 8085 the other day and I can=E2=80=99t believe I used to do that without = glasses, let alone a magnifier = lens.
 
While I am at the point where I need multiple glasses for = different scenarios (driving, computer, reading, etc), I don=E2=80=99t = quite need them yet for soldering. It=E2=80=99s coming, I = know.
 
Michael = Kamprath

= --Apple-Mail=_156569BE-B03F-400D-A5B9-6F2580C4F6DA--