Re: [M100] Faulty NEC PC-8201A Screen Contrast Control

i have one original NEC PC-8201 Potentiometer and one new (Replacement) one, if you need. Cheers Pawel On March 22, 2024 at 3:31 PM David Plass wrote: Yes, th

Re: [M100] pc8206a

yes, i need. depending on the price of course. Kind regards  Pawel Radomychelski  On October 27, 2023 at 4:31 AM Peter Vollan wrote: Does anyone need an NEC Model PC-62

Re: [M100] New 10-line game

wow, great! Thank you Gary! On March 13, 2023 at 3:17 AM Gary Weber wrote: Pawal and other NEC enthusiasts, BOUNCE.BA converted for the NEC is now available up on Web8201's Games area: https://www.w

Re: [M100] Olivetti M10

I ask me, if the Olivetti M10 Multiplan ROM could be used with REX# on an NEC PC-8201 / PC-8300? On March 5, 2023 at 4:45 AM Gary Weber wrote: I believe there was a release of Multiplan for the Olivetti M-

Re: [M100] Where to get SARDOS 1.73 or later?

Thank you very much, Gary! On February 13, 2023 at 1:13 AM Gary Weber wrote: Hi Pawel, Working under the advice of Kurt, I'm the one that actually created the SARDOS 1.73 version

Re: [M100] NEC PC-8201 Replacement for 16X 104M Green capacitor

ta and address are toggling @ the main ROM and RAM > sockets? > pull and reseat ROM and RAM modules? > > just a few suggestions.  > Do you have something like a scope to be able to look at signals? > > > > On Fri, Oct 22, 2021 at 12:02 PM ExPLIT | Pawel Radomychelski >

Re: [M100] NEC PC-8201 Replacement for 16X 104M Green capacitor

t; check that data and address are toggling @ the main ROM and RAM > sockets? > pull and reseat ROM and RAM modules? > > just a few suggestions.  > Do you have something like a scope to be able to look at signals? > > > > On Fri, Oct 22, 2021 at 12:02 PM ExPLIT | P

Re: [M100] NEC PC-8201 Replacement for 16X 104M Green capacitor

22, 2021 at 9:10 AM ExPLIT | Pawel Radomychelski > wrote: > > Hello collegues! > > > > I bought another "non-working" NEC PC-8201 (Japansese Model). > > Found out that one green capacitor 16X 104M is broken. > > Now i am looking for the modern replacement

Re: [M100] NEC PC-8201A German QWERTZ change to US QWERTY

ie did something similar, converting a M102 to dvorak https://www.bunniestudios.com/blog/?page_id=27 On Fri, Sep 3, 2021 at 5:13 PM ExPLIT | Pawel Radomychelski wrote: Hello guys, maybe someone knows how to get rid of German QWERTZ Keyboard on a NEC PC

[M100] NEC PC-8201A German QWERTZ change to US QWERTY

Hello guys, maybe someone knows how to get rid of German QWERTZ Keyboard on a NEC PC-8201A? I flashed already new Y2K corrected English ROM, but the keyboard layout is still QWERTZ. I know for example on NEC PC-8300 its possible to change keyboard layout with jumper, dont know, if there is such p

[M100] Good Datasette device ?

Hi guys, my NEC PC-8281A Data Recorde seems to be defective (It saves files on the tape, but can't read from them. When i try to "play" a data tape throu normal headphones i don't hear any noise.) Do some of you know a good substitution datasette ? Preferably one, which i can buy here in Europe.

Re: [M100] Good Datasette device ?

gt; should be mono, not stereo. > > Something like this: https://www.msx.org/wiki/NEC_PC-DR330 > > As an aside, do you have the manual/documentation for the 8281? I've > been looking online and not found anything. > > --Brad > > > On Fri, Aug 20, 2021 at 2:07 P

Re: [M100] Good Datasette device ?

manual/documentation for the 8281? I've been looking online and not found anything. --Brad On Fri, Aug 20, 2021 at 2:07 PM ExPLIT | Pawel Radomychelski wrote: > Hi guys, > > my NEC PC-8281A Data Recorde seems to be defective (It saves files on > the tape, but can't read f

[M100] NEC PC-8201 / PC-8201A interchangable parts

hello guys. A question to our gurus: Which parts are interchangable between Japanese NEC PC-8201 and European / US NEC PC-8201a As i know, keyboard is a bit different and ROM is also not interchangable.

Re: [M100] NEC 32kb BANK2 upgrade card and M100 24kB Upgrade card

indeed, thats interesting. i also have an silver 8201 and round sockets. i think the flat sockets a more "modern", they are cheaper in production and easier to handle, than the round ones... cheers Pawel

Re: [M100] Burn in program

I would wish something like the same Hardware, but on upgraded Motherboard. With new capcitors etc. I am NEC PC-8201 user, all this Thru-Hole chips are still avaiable today, or maybe its possible to use less components. I build a Minimax 8085 http://www.malinov.com/Home/sergeys-projects/minimax80

Re: [M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs

Unfortunately, LADDIEALPHA hangs on the same place while oploading the same ROM. So its not a DL+ Problem. i attached another USB2SERIAL Adapter to the Notebook to be on /dev/ttyUSB1. Need to investigate, will try to upload it over Windows on a "REAL" SERIAL Port. Thanks for your hints and help g

[M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs

Hello collegues! Thanks to Steven, i got an REX# for my NEC PC-8201. Anything is working fine, i have TS-DOS and Ultimate ROM II on my REX#. But if i want to install additional ROM (In my case R2CNEC) over the REXMGR the transfer is somehow hanging... To my System: I have an Debian 11 Notebook wi

Re: [M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs

.com To: m...@bitchin100.com Subject: Re: [M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs Date: Fri, 9 Jul 2021 18:25:28 -0700 On Fri, Jul 9, 2021 at 6:14 PM ExPLIT | Pawel Radomychelski wrote: > Thanks John, will try Laddie Alpha > I alos think it has something to d

Re: [M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs

Option ROM hex files and what we confirmed REX working with. -- John. On Fri, Jul 9, 2021 at 4:59 PM ExPLIT | Pawel Radomychelski wrote: > Hello collegues! > > Thanks to Steven, i got an REX# for my NEC PC-8201. > Anything is working fine, i have TS-DOS and Ultimate ROM II on my >

Re: [M100] Must-have ROMs

of course are the chips available. just look for 27C256 on ebay - you will find tones of them. As a EPROM burner i use TL866 II. there are also lot of offers on ebay/amazon. Kind regards Pawel

[M100] Any Apps for connecting Tandy / NEC to Psion Series 5 / 5mx ?

Hi guys Are there some apps in the wild for connectiong Tandy / NEC to the Psion Series 5 / 5mx ? Tha would be cool... -- Kind regards /  Mit freundlichen Grüßen ExPLIT IT Solutions Pawel Radomychelski

Re: [M100] FPGA Model 100

The simplest implementation of 80c85 is MiniMax 8085 by Sergey Kiselev. It has a very small amount of chips and is easy to build. It has also extension port for connecting keyboard and display. But for ROM exist only TinyBasic and mon85

Re: [M100] Fake MAX3232 RS-232 transceivers from China / Ebay

I bought 5 of this MAX232ACPE from China on eBay for my Max 8085 Project. 3 of 5 was getting very hot and "have burned" somehow. I took an old TI MAX232N and anything was fine. -- Kind regards /  Mit freundlichen Grüßen ExPLIT IT Solutions Pawel Radomychelski -Original Message- From:

Re: [M100] NEC PC-8201(A) Recapping Help

Solutions Pawel Radomychelski -Original Message- From: ExPLIT | Pawel Radomychelski Reply-To: m...@bitchin100.com To: m...@bitchin100.com Subject: Re: [M100] NEC PC-8201(A) Recapping Help Date: Wed, 05 May 2021 23:45:06 +0200 Thanks guys. LCD unit is working fine on another NEC. So

Re: [M100] NEC PC-8201(A) Recapping Help

? The bad buffer chip?   Robert   From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of ExPLIT | Pawel Radomychelski Sent: Wednesday, May 05, 2021 1:28 PM To: m...@bitchin100.com Subject: Re: [M100] NEC PC-8201(A) Recapping Help   Thanks for the Info, Jeff. No, i have no leaking caps on my

Re: [M100] NEC PC-8201(A) Recapping Help

on a few PC-8201/A computers. I have not seen one that needed recapped. The TRS-80 Model 100 and Olivetti M10 are a different story, they all need recapped.   Do your capacitors appear to be leaking or do you suspect they are faulty?   Jeff Birt   From: M100 On Behalf Of ExPLIT | Pawel Radomychelski

[M100] NEC PC-8201(A) Recapping Help

Hello Friends! Have someone already did a recapping job on the NEC PC-8201 or PC-8201A ? I am searching for a starting point, or simple table sheet which capacitors / voltage / capacity should be used ? Any help is welcome. Thanks -- Kind regards /  Mit freundlichen Grüßen ExPLIT IT Solutions

Re: [M100] NEC PC-8201(A) Display issues

VEE (-5V) > 4 VB (Battery charge voltage) > > 5 GND > 6 VDD (+5V) > > > > I have attached the relevant section of the schematic that deals with the > contrast adjustment as well. > > > > Jeff Birt > >

[M100] NEC PC-8201(A) Display issues

Dear Model T / NEC collegues! What i noticed holding a couple of NEC PC-8201 and PC-8201A in my hands, that many have a strange display issues: Unit working fine, after some time display is getting blank and i can't see anything on the LCD. After switch off/switch on - its fine again. I noticed t

Re: [M100] NEC PC-8201(A) Display issues

cycle though. Take it apart so that you can measure the power supply voltages. Measure the +5 and -5V when it is working properly and then when the LCD goes blank. Jeff Birt -Original Message- From: M100 On Behalf Of ExPLIT | Pawel Radomychelski Sent: Sunday, May 2, 2021 10:53 AM To: m

Re: [M100] NEC PC-8201(A) Display issues

to power off if you have not used it for 5 minutes or > so. Is this what you are experiencing? > > > > Jeff Birt > > > > From: M100 On Behalf Of ExPLIT | Pawel > Radomychelski > Sent: Sunday, May 2, 2021 9:20 AM > To: m...@bitchin100.com > Subject:

[M100] Fun with Super Capacitor 5,5 V / 1F on NEC PC-8201A

Hello collegues! as some forum collegues told me, it is a good idea to use a Supercapacitor (5,5V / 1F) instead of new NiMH memory battery. I soldered this cap instead the battery, let it "charge" couple of minutes and tried after couple of hours to switch on. Gues what? Now my NEC PC-8210A can be

Re: [M100] Fun with Super Capacitor 5,5 V / 1F on NEC PC-8201A

Apr 2021 20:29:05 -0400 On 4/21/21 8:01 PM, ExPLIT | Pawel Radomychelski wrote: > Hello collegues! > > as some forum collegues told me, it is a good idea to use a > Supercapacitor (5,5V / 1F) instead of new NiMH memory battery. > I soldered this cap instead the battery, let it &qu

Re: [M100] Fun with Super Capacitor 5,5 V / 1F on NEC PC-8201A

Thanks for the info, John. I try to find a solution for keeping my PC-8201A intact in the next years. Of course, 3,6V NiMH Battery is much better comparing to original 3,6V NiCd one. But even NiMH can leak, and i want to minimise risk of mainboard failure. I will see how it performs in a couple of

[M100] NEC PC-8201A 3,6V Barrel Battery Replacement

Good evening collegues! Today i replaced the barrel Battery (Yuasa  3-51FT-A, 3,6V 50mAh)  in my NEC PC-8201A with a rechargable button cell (Maxell ML2032 3V 65mAh) Now i ask me, if this mod is kosher, or should i choose another NiMh Barrel Battery with 3,6V ? Thanks -- Kind regards /  Mit f

Re: [M100] NEC PC-8201A 3,6V Barrel Battery Replacement

-8201A 3,6V Barrel Battery Replacement Date: Sat, 17 Apr 2021 18:05:07 -0500 I have them and Arcadeshopper does too: https://www.soigeneris.com/memory-backup-battery-mbat1   Jeff Birt   From: M100 On Behalf Of ExPLIT | Pawel Radomychelski Sent: Saturday, April 17, 2021 5:33 PM To: m...@bitchin100

Re: [M100] NEC PC-8201A 3,6V Barrel Battery Replacement

3.6v rating of NiMH is above what LiMnO2 wants (3.3) so I would strongly recommend going back to NiMh. https://biz.maxell.com/en/rechargeable_batteries/ML_17e.pdf -Josh On Sat, Apr 17, 2021 at 4:58 PM ExPLIT | Pawel Radomychelski wrote: > > Good evening collegues! > > Today i re

Re: [M100] NEC PC-8201 adjusting contrast doesnt work

5V and -5V at the LCD itself to rule out a connection issue (bad joint at connector or leading to connector). Jeff Birt -Original Message- From: M100 On Behalf Of ExPLIT | Pawel Radomychelski Sent: Friday, April 16, 2021 2:20 PM To: m100@lists.bitchin1

[M100] NEC PC-8201 adjusting contrast doesnt work

Hello collegues. I got an Japanese NEC PC-8201. While its working, i can't adjust lcd contrast. I tried already change lcd and power board, but it didnt help. Problem is somewhere on the mainboard. I removed the round black part for ajusting lcd contrast, cleaned it and put back on. Didn't help.