Welcome to the list and the 'Model T' community! As a matter of fact several slightly different external 80x25 video adapters do exist, although unlike the DVI which connects to the system bus these connect either to the RS-232 com port or, with a minor board mod, to the BCR port.
See http://bitchin100.com/wiki/index.php?title=File:VT100_1.jpg and http://bitchin100.com/wiki/index.php?title=BCR_TTL_SERIAL_HACK for a version adapted to the M100 by Steve Adolph, a list member, currently awaiting production quantity parts. Note that the BCR port mod may be superseded by a different internal connection. m ---- Original Message ----- From: David B To: m100@lists.bitchin100.com Sent: Wednesday, June 17, 2020 7:48 PM Subject: [M100] Video out adapter? Hi just got a (working!) model 100 off eBay and replaced the nicd battery. So far, so good. Learning about this computer and just read there was a combined external disk and video adapter. I'm interested in the external video part. Has anyone designed an external video adapter for this, that can be built by a hobbyist? thanks, David ------------------------------------------------------------------------------ From: M100 <m100-boun...@lists.bitchin100.com> on behalf of m100-requ...@lists.bitchin100.com <m100-requ...@lists.bitchin100.com> Sent: Wednesday, June 17, 2020 1:39 PM To: m100@lists.bitchin100.com <m100@lists.bitchin100.com> Subject: M100 Digest, Vol 114, Issue 12 Send M100 mailing list submissions to m100@lists.bitchin100.com To subscribe or unsubscribe via the World Wide Web, visit http://lists.bitchin100.com/listinfo.cgi/m100-bitchin100.com or, via email, send a message with subject or body 'help' to m100-requ...@lists.bitchin100.com You can reach the person managing the list at m100-ow...@lists.bitchin100.com When replying, please edit your Subject line so it is more specific than "Re: Contents of M100 digest..." Today's Topics: 1. Rexcpm update (Stephen Adolph) 2. Re: Rexcpm update (David Rogers) 3. Re: Noisy T102 (B 9) 4. Re: Noisy T102 (Erik van der Tier) 5. Re: Noisy T102 (Erik van der Tier) 6. Re: Noisy T102 (Stephen Adolph) 7. Re: Noisy T102 (Jim Toth) 8. Re: Noisy T102 (Mike Stein) 9. Re: Rexcpm update (Bert Put) 10. Re: Noisy T102 (Alex ...) 11. Annotated disassemble of T102 rom (Erik van der Tier) 12. Re: Annotated disassemble of T102 rom (Stephen Adolph) 13. Re: Annotated disassemble of T102 rom (Ken Pettit) 14. Re: Annotated disassemble of T102 rom (Erik van der Tier) 15. Re: Annotated disassemble of T102 rom (Erik van der Tier) 16. Re: Annotated disassemble of T102 rom (Ken Pettit) 17. Tandy 200 Black Screen (ethan saul) 18. Re: Tandy 200 Black Screen (Stephen Adolph) ---------------------------------------------------------------------- Message: 1 Date: Tue, 16 Jun 2020 22:11:30 -0400 From: Stephen Adolph <twospru...@gmail.com> To: m...@bitchin100.com Subject: [M100] Rexcpm update Message-ID: <camcmnv7xfugfhuq2w+inw9qm77wvuhxzhew+qodgaz2adgz...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" I am well into the 2nd build of REXCPM. All of the REXCPM modules are built, untested, but I still need to build the adapters. So good progress. I'm aiming to ship the next tranch in 2 weeks or sooner. Steve -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200616/892a2d16/attachment-0001.html> ------------------------------ Message: 2 Date: Tue, 16 Jun 2020 19:43:57 -0700 From: David Rogers <wa7...@gmail.com> To: m...@bitchin100.com Subject: Re: [M100] Rexcpm update Message-ID: <69772e77-75b5-44c3-a818-1d8660a9c...@gmail.com> Content-Type: text/plain; charset="utf-8" ???? David, WA7ZYQ C?est la vie, c?est la guerre, viva la salade de pommes de terre. > On Jun 16, 2020, at 7:11 PM, Stephen Adolph <twospru...@gmail.com> wrote: > > I am well into the 2nd build of REXCPM. All of the REXCPM modules are built, untested, but I still need to build the adapters. > So good progress. I'm aiming to ship the next tranch in 2 weeks or sooner. > Steve -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200616/84e5c9e2/attachment-0001.html> ------------------------------ Message: 3 Date: Tue, 16 Jun 2020 19:52:31 -0700 From: B 9 <hacke...@gmail.com> To: m...@bitchin100.com Subject: Re: [M100] Noisy T102 Message-ID: <cag1tpetpsaurqtuc1dsayoqbdhlsrtnkcbrehfvk7pzuxzr...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" On Mon, Jun 15, 2020 at 11:59 PM Erik van der Tier <e...@vdtier.nl> wrote: > It?s the kind of noise where you can hear the processing of the CPU, more > when its busy and it seems to have clear ?structure? to it in relation to > what the T102 is doing. > That's actually kind of cool. But, if you want to get rid of it, maybe double check that you put your electrolytics in with the right polarity. ?b9 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200616/64f85f17/attachment-0001.html> ------------------------------ Message: 4 Date: Wed, 17 Jun 2020 09:13:58 +0200 From: Erik van der Tier <e...@vdtier.nl> To: m...@bitchin100.com Subject: Re: [M100] Noisy T102 Message-ID: <7ef82d42-e41b-47c9-963b-8f4eecb57...@vdtier.nl> Content-Type: text/plain; charset="utf-8" Hehe, yeah, if it couldn?t be a sign of trouble it would definitely be cool ;). I remember that other 80?s computers made these kinds of sounds while processing. I know our Philips P2000T did and later our Amstrad CPC464 as well?. Cheap analog electronics I guess? I did double and triple check the polarity of the caps, so I don?t think that?s the problem. Erik > On 17 Jun 2020, at 04:52, B 9 <hacke...@gmail.com> wrote: > > On Mon, Jun 15, 2020 at 11:59 PM Erik van der Tier <e...@vdtier.nl <mailto:e...@vdtier.nl>> wrote: > It?s the kind of noise where you can hear the processing of the CPU, more when its busy and it seems to have clear ?structure? to it in relation to what the T102 is doing. > > That's actually kind of cool. > > But, if you want to get rid of it, maybe double check that you put your electrolytics in with the right polarity. > > ?b9 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/9dbcc183/attachment-0001.html> ------------------------------ Message: 5 Date: Wed, 17 Jun 2020 09:15:52 +0200 From: Erik van der Tier <e...@vdtier.nl> To: m...@bitchin100.com Subject: Re: [M100] Noisy T102 Message-ID: <94969ebd-cf0c-4b4f-a98c-c67d5a74f...@vdtier.nl> Content-Type: text/plain; charset="utf-8" I have to open it up again, tonight to check on leaking anyway, so I?ll look up the numbers of those caps. I really need to get myself a decent desoldering station, it?s currently taking too much time to desolder these buggers. Erik > On 16 Jun 2020, at 13:31, Stephen Adolph <twospru...@gmail.com> wrote: > > That's interesting! > Could be that one of the caps you replaced on the +5V line is now microphonic, or the transformer caps. > Which ones did you replace? > It would be interesting to see if you can isolate it. If you had some alternative caps that you could try for the 3 you have changed, you could try changing one at a time. > > > On Tue, Jun 16, 2020 at 2:59 AM Erik van der Tier <e...@vdtier.nl <mailto:e...@vdtier.nl>> wrote: > Hi All, > > I?ve had to replace 3 caps on my trusty T102 as they were leaking (nasty as they were fairly recent replacements). The surgery seemed to have worked, except for increase noise. It?s the kind of noise where you can hear the processing of the CPU, more when its busy and it seems to have clear ?structure? to it in relation to what the T102 is doing. > Is this a sign that the same or other caps are not ok? Does anyone have experience with this. I really want to get this capacitor business over with for once and at least a bunch of years (I?m having too much fun with the t102 to let it just die). > Any thoughts on how to fix this? > > Cheers, > Erik -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/a2a35b3f/attachment-0001.html> ------------------------------ Message: 6 Date: Wed, 17 Jun 2020 07:54:07 -0400 From: Stephen Adolph <twospru...@gmail.com> To: "m...@bitchin100.com" <m...@bitchin100.com> Subject: Re: [M100] Noisy T102 Message-ID: <camcmnv5qbw3jgivop_6qnypwqfap1+3tpehhbh0okq_n5ss...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Heres a tip. For leaded electrolytic caps I "walk" them out by heating one lead and leaning the cap to one side such that the loose lead can slide out a bit. Then I do the same for the other lead, alternating back and forth until it is fully out. On Wednesday, June 17, 2020, Erik van der Tier <e...@vdtier.nl> wrote: > I have to open it up again, tonight to check on leaking anyway, so I?ll > look up the numbers of those caps. I really need to get myself a decent > desoldering station, it?s currently taking too much time to desolder these > buggers. > > Erik > > On 16 Jun 2020, at 13:31, Stephen Adolph <twospru...@gmail.com> wrote: > > That's interesting! > Could be that one of the caps you replaced on the +5V line is now > microphonic, or the transformer caps. > Which ones did you replace? > It would be interesting to see if you can isolate it. If you had some > alternative caps that you could try for the 3 you have changed, you could > try changing one at a time. > > > On Tue, Jun 16, 2020 at 2:59 AM Erik van der Tier <e...@vdtier.nl> wrote: > >> Hi All, >> >> I?ve had to replace 3 caps on my trusty T102 as they were leaking (nasty >> as they were fairly recent replacements). The surgery seemed to have >> worked, except for increase noise. It?s the kind of noise where you can >> hear the processing of the CPU, more when its busy and it seems to have >> clear ?structure? to it in relation to what the T102 is doing. >> Is this a sign that the same or other caps are not ok? Does anyone have >> experience with this. I really want to get this capacitor business over >> with for once and at least a bunch of years (I?m having too much fun with >> the t102 to let it just die). >> Any thoughts on how to fix this? >> >> Cheers, >> Erik > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/e8d55117/attachment-0001.html> ------------------------------ Message: 7 Date: Wed, 17 Jun 2020 10:03:53 -0400 From: "Jim Toth" <jt...@localnet.com> To: <m...@bitchin100.com> Subject: Re: [M100] Noisy T102 Message-ID: <9B4F59F15D46480A8F74D285D7462EB0@OWNER27B149584> Content-Type: text/plain; charset="utf-8" An AM radio near a Model T sounds like that, too. ----- Original Message ----- From: B 9 To: m...@bitchin100.com Sent: Tuesday, June 16, 2020 10:52 PM Subject: Re: [M100] Noisy T102 On Mon, Jun 15, 2020 at 11:59 PM Erik van der Tier <e...@vdtier.nl> wrote: It?s the kind of noise where you can hear the processing of the CPU, more when its busy and it seems to have clear ?structure? to it in relation to what the T102 is doing. That's actually kind of cool. But, if you want to get rid of it, maybe double check that you put your electrolytics in with the right polarity. ?b9 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/91116399/attachment-0001.html> ------------------------------ Message: 8 Date: Wed, 17 Jun 2020 11:09:40 -0400 From: "Mike Stein" <mhs.st...@gmail.com> To: <m...@bitchin100.com> Subject: Re: [M100] Noisy T102 Message-ID: <625E81B6452F4D1DAC09F88BCACFEA36@310e2> Content-Type: text/plain; charset="utf-8" Have you tried disconnecting the beeper in case bus noise is leaking across somehow? m ----- Original Message ----- From: Erik van der Tier To: m...@bitchin100.com Sent: Wednesday, June 17, 2020 3:13 AM Subject: Re: [M100] Noisy T102 Hehe, yeah, if it couldn?t be a sign of trouble it would definitely be cool ;). I remember that other 80?s computers made these kinds of sounds while processing. I know our Philips P2000T did and later our Amstrad CPC464 as well?. Cheap analog electronics I guess? I did double and triple check the polarity of the caps, so I don?t think that?s the problem. Erik On 17 Jun 2020, at 04:52, B 9 <hacke...@gmail.com> wrote: On Mon, Jun 15, 2020 at 11:59 PM Erik van der Tier <e...@vdtier.nl> wrote: It?s the kind of noise where you can hear the processing of the CPU, more when its busy and it seems to have clear ?structure? to it in relation to what the T102 is doing. That's actually kind of cool. But, if you want to get rid of it, maybe double check that you put your electrolytics in with the right polarity. ?b9 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/644dc186/attachment-0001.html> ------------------------------ Message: 9 Date: Wed, 17 Jun 2020 10:26:59 -0500 From: Bert Put <b...@bellsouth.net> To: m...@bitchin100.com Subject: Re: [M100] Rexcpm update Message-ID: <32979f20-2a35-f5dc-1261-9437a05a4...@bellsouth.net> Content-Type: text/plain; charset=utf-8 Thanks Steve, looking forward to getting mine. :-) Cheers, Bert On 6/16/20 9:11 PM, Stephen Adolph wrote: > I am well into the 2nd build of REXCPM.? All of the REXCPM modules are > built, untested, but I still need to build the adapters. > So good progress.? I'm aiming to ship the next tranch in 2 weeks or sooner. > Steve ------------------------------ Message: 10 Date: Wed, 17 Jun 2020 11:27:54 -0400 From: "Alex ..." <abortretryf...@gmail.com> To: m...@bitchin100.com Subject: Re: [M100] Noisy T102 Message-ID: <cadb9qzm5sovvntfouqakcdjt6iuws+3kpijfyki0n7-5fun...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Jim, Just yesterday I was thinking how my T102 would make a good PSK31 terminal, but hearing that I'm not so sure about that idea anymore... ? On Wed, Jun 17, 2020 at 10:04 AM Jim Toth <jt...@localnet.com> wrote: > An AM radio near a Model T sounds like that, too. > > > > ----- Original Message ----- > *From:* B 9 <hacke...@gmail.com> > *To:* m...@bitchin100.com > *Sent:* Tuesday, June 16, 2020 10:52 PM > *Subject:* Re: [M100] Noisy T102 > > On Mon, Jun 15, 2020 at 11:59 PM Erik van der Tier <e...@vdtier.nl> wrote: > >> It?s the kind of noise where you can hear the processing of the CPU, more >> when its busy and it seems to have clear ?structure? to it in relation to >> what the T102 is doing. >> > > That's actually kind of cool. > > But, if you want to get rid of it, maybe double check that you put your > electrolytics in with the right polarity. > > ?b9 > > -- Disclaimer: Any resemblance between the above views and those of my employer, my terminal, or the view out my window are purely coincidental. Any resemblance between the above and my own views is non-deterministic. The question of the existence of views in the absence of anyone to hold them is left as an exercise for the reader. The question of the existence of the reader is left as an exercise for the second god coefficient. (A discussion of non-orthogonal, non-integral polytheism is beyond the scope of this article.) Thanks /usr/games/fortune -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/e65fa286/attachment-0001.html> ------------------------------ Message: 11 Date: Wed, 17 Jun 2020 17:35:26 +0200 From: Erik van der Tier <e...@vdtier.nl> To: m...@bitchin100.com Subject: [M100] Annotated disassemble of T102 rom Message-ID: <a105c7d0-ffa1-4256-8265-02a48cd98...@vdtier.nl> Content-Type: text/plain; charset=utf-8 Hi, I?m currently well on my way to merge the annotated M100 rom with a disassemble of the T102 rom. This will include documentation of the differences. I hope to create a working .asm file with labels and such that can be reassembled into a functioning Rom (I?m working my way towards a custom os-rom for my 102). If anyone is interested I can put it up on my GitHub account so you can get it. I can imagine this could be interesting for the VirtualT emulator as it provides all the annotations on disassembling the M100 rom but not the T102 currently (except for the RST opcodes). Cheers, Erik ------------------------------ Message: 12 Date: Wed, 17 Jun 2020 12:06:00 -0400 From: Stephen Adolph <twospru...@gmail.com> To: m...@bitchin100.com Subject: Re: [M100] Annotated disassemble of T102 rom Message-ID: <camcmnv6btu6x6vox9h33boxbuymebu4frg7_p7dbwxbml97...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Hi, it would be great to make this collaborative. I have a lot of my own notes on a disassembly, and I also have a paper disassembly that I acquired a while back. On Wed, Jun 17, 2020 at 11:35 AM Erik van der Tier <e...@vdtier.nl> wrote: > Hi, > > I?m currently well on my way to merge the annotated M100 rom with a > disassemble of the T102 rom. This will include documentation of the > differences. I hope to create a working .asm file with labels and such that > can be reassembled into a functioning Rom (I?m working my way towards a > custom os-rom for my 102). > > If anyone is interested I can put it up on my GitHub account so you can > get it. I can imagine this could be interesting for the VirtualT emulator > as it provides all the annotations on disassembling the M100 rom but not > the T102 currently (except for the RST opcodes). > > Cheers, > Erik -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/6e646565/attachment-0001.html> ------------------------------ Message: 13 Date: Wed, 17 Jun 2020 09:10:27 -0700 From: Ken Pettit <petti...@gmail.com> To: m100@lists.bitchin100.com Subject: Re: [M100] Annotated disassemble of T102 rom Message-ID: <5eea4073.7020...@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Hi Erik, I presume you are also referencing the additional M100 ROM annotations I did by hand which are not part of the VirtualT standard output (and quite extensive)? Ken On 6/17/20 8:35 AM, Erik van der Tier wrote: > Hi, > > I?m currently well on my way to merge the annotated M100 rom with a disassemble of the T102 rom. This will include documentation of the differences. I hope to create a working .asm file with labels and such that can be reassembled into a functioning Rom (I?m working my way towards a custom os-rom for my 102). > > If anyone is interested I can put it up on my GitHub account so you can get it. I can imagine this could be interesting for the VirtualT emulator as it provides all the annotations on disassembling the M100 rom but not the T102 currently (except for the RST opcodes). > > Cheers, > Erik ------------------------------ Message: 14 Date: Wed, 17 Jun 2020 19:21:20 +0200 From: Erik van der Tier <e...@vdtier.nl> To: m...@bitchin100.com Subject: Re: [M100] Annotated disassemble of T102 rom Message-ID: <e2e25884-7dfb-40c2-80ad-5a9977028...@vdtier.nl> Content-Type: text/plain; charset="utf-8" Sounds like a plan, I?m currently doing a first pass getting the routine headercomments in and translating the none sense opcodes into db and dw?s from the m100 dis. I?ll set up a github repo once I?m through this first pass. Next pass will be find and replace on all standard addresses and known rom functions. That way the m100 and t102 should be mostly identical which should help adding the other comments that are available. Cheers, Erik > On 17 Jun 2020, at 18:06, Stephen Adolph <twospru...@gmail.com> wrote: > > ? > Hi, it would be great to make this collaborative. I have a lot of my own notes on a disassembly, and I also have a paper disassembly that I acquired a while back. > > >> On Wed, Jun 17, 2020 at 11:35 AM Erik van der Tier <e...@vdtier.nl> wrote: >> Hi, >> >> I?m currently well on my way to merge the annotated M100 rom with a disassemble of the T102 rom. This will include documentation of the differences. I hope to create a working .asm file with labels and such that can be reassembled into a functioning Rom (I?m working my way towards a custom os-rom for my 102). >> >> If anyone is interested I can put it up on my GitHub account so you can get it. I can imagine this could be interesting for the VirtualT emulator as it provides all the annotations on disassembling the M100 rom but not the T102 currently (except for the RST opcodes). >> >> Cheers, >> Erik -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/09e3442f/attachment-0001.html> ------------------------------ Message: 15 Date: Wed, 17 Jun 2020 19:22:27 +0200 From: Erik van der Tier <e...@vdtier.nl> To: m...@bitchin100.com Subject: Re: [M100] Annotated disassemble of T102 rom Message-ID: <3ae88d54-7099-4c65-9e18-2fccd99c7...@vdtier.nl> Content-Type: text/plain; charset=utf-8 I?m currently merging the standard virtual-t output, but any additional notes and comments would be great to add in! Cheers, Erik > On 17 Jun 2020, at 18:10, Ken Pettit <petti...@gmail.com> wrote: > > ?Hi Erik, > > I presume you are also referencing the additional M100 ROM annotations I did by hand which are not part of the VirtualT standard output (and quite extensive)? > > Ken > >> On 6/17/20 8:35 AM, Erik van der Tier wrote: >> Hi, >> >> I?m currently well on my way to merge the annotated M100 rom with a disassemble of the T102 rom. This will include documentation of the differences. I hope to create a working .asm file with labels and such that can be reassembled into a functioning Rom (I?m working my way towards a custom os-rom for my 102). >> >> If anyone is interested I can put it up on my GitHub account so you can get it. I can imagine this could be interesting for the VirtualT emulator as it provides all the annotations on disassembling the M100 rom but not the T102 currently (except for the RST opcodes). >> >> Cheers, >> Erik > ------------------------------ Message: 16 Date: Wed, 17 Jun 2020 10:28:38 -0700 From: Ken Pettit <petti...@gmail.com> To: m100@lists.bitchin100.com Subject: Re: [M100] Annotated disassemble of T102 rom Message-ID: <5eea52c6.6030...@gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Erik, I have MANY, MANY more lines commented here: http://www.club100.org/memfiles/index.php?&direction=0&order=&directory=Ken%20Pettit/M100%20ROM%20Disassembly Ken On 6/17/20 10:22 AM, Erik van der Tier wrote: > I?m currently merging the standard virtual-t output, but any additional notes and comments would be great to add in! > > Cheers, > Erik > >> On 17 Jun 2020, at 18:10, Ken Pettit <petti...@gmail.com> wrote: >> >> ?Hi Erik, >> >> I presume you are also referencing the additional M100 ROM annotations I did by hand which are not part of the VirtualT standard output (and quite extensive)? >> >> Ken >> >>> On 6/17/20 8:35 AM, Erik van der Tier wrote: >>> Hi, >>> >>> I?m currently well on my way to merge the annotated M100 rom with a disassemble of the T102 rom. This will include documentation of the differences. I hope to create a working .asm file with labels and such that can be reassembled into a functioning Rom (I?m working my way towards a custom os-rom for my 102). >>> >>> If anyone is interested I can put it up on my GitHub account so you can get it. I can imagine this could be interesting for the VirtualT emulator as it provides all the annotations on disassembling the M100 rom but not the T102 currently (except for the RST opcodes). >>> >>> Cheers, >>> Erik ------------------------------ Message: 17 Date: Wed, 17 Jun 2020 20:31:36 +0000 From: ethan saul <ethan.s...@outlook.com> To: "m100@lists.bitchin100.com" <m100@lists.bitchin100.com> Subject: [M100] Tandy 200 Black Screen Message-ID: <vi1pr0701mb6768e80573a4c2b02837210a8f...@vi1pr0701mb6768.eurprd07.prod.outlook.com> Content-Type: text/plain; charset="windows-1252" Hi all, Anyone know anything about Tandy 200 black screen of death? I have changed the CMOS battery and tried a cold start using CTRL+SHIFT+BREAK+RESET. When I power it on I hear a click from the speaker and the screen goes black the contrast knob doesn't dim or darken the screen. I have also tried getting it to go into basic and beeping the speaker with no luck. The machine was working before the battery change however the old battery was leaking so I had to change it. There was no corrosion and the battery area was cleaned with Isopropanol. Also the Power button turns the computer off and then back on straight after every time I push it and when there is power from either the battery?s and the ac adapter. Any Ideas what could be the problem? Thanks, Ethan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/68382e4e/attachment-0001.html> ------------------------------ Message: 18 Date: Wed, 17 Jun 2020 16:36:00 -0400 From: Stephen Adolph <twospru...@gmail.com> To: m...@bitchin100.com Subject: Re: [M100] Tandy 200 Black Screen Message-ID: <CAMCMnV7cK2=LMb2O1ccb=bujwgsasdngrsuzp74pvyevlow...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Did you double check the polarity of the new battery? If the CMOS battery was flat on install, it will take some time to charge up. It has to be charged or the T200 won't work. ..Steve On Wed, Jun 17, 2020 at 4:31 PM ethan saul <ethan.s...@outlook.com> wrote: > Hi all, > > > > Anyone know anything about Tandy 200 black screen of death? I have changed > the CMOS battery and tried a cold start using CTRL+SHIFT+BREAK+RESET. > > When I power it on I hear a click from the speaker and the screen goes > black the contrast knob doesn't dim or darken the screen. > > I have also tried getting it to go into basic and beeping the speaker with > no luck. The machine was working before the battery change however the old > battery was leaking so I had to change it. > > There was no corrosion and the battery area was cleaned with Isopropanol. > > Also the Power button turns the computer off and then back on straight > after every time I push it and when there is power from either the > battery?s and the ac adapter. > > Any Ideas what could be the problem? > > > > Thanks, > > Ethan > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20200617/d0bbfdd8/attachment-0001.html> ------------------------------ Subject: Digest Footer _______________________________________________ M100 mailing list M100@lists.bitchin100.com http://lists.bitchin100.com/listinfo.cgi/m100-bitchin100.com ------------------------------ End of M100 Digest, Vol 114, Issue 12 *************************************
