Re: [M100] Bitchin' 100 on Bing

Hi folks – Long time reader, first time poster 😊 I work at Microsoft, so I reached out to the Bing team internally to see if they could help. It looks like some of the wiki pages were triggering a block on our end. I don’t know the specifics, but one of the engineers removed the block this mor

Re: [M100] Tandy Portable Disk Drive 2

hi, just a few questions- Do you hear any activity at all, like the disk spinning? Any LED activity at all? When you toggle power on/off, does the LED flicker once? Are you using battery or external power? Would be good to confirm the internal power supply is getting power and working correctly.

Re: [M100] Tandy Portable Disk Drive 2

Are you using the correct bootstrap? (Pdd 1 vs pdd 2) I made a video a few years ago showing various failure modes if that helps. https://youtu.be/p4q6pqPSaCU On Mon, Nov 14, 2022, 07:27 Stephen Adolph wrote: > hi, just a few questions- > > Do you hear any activity at all, like the disk spinni

Re: [M100] custom key mapping generator for Tandy 200

The datasheet says to rest vpp at vcc. Most do, even if elsewhere they also say that writing is disabled as long as vpp is below vpp and the only low limit is pretty much the same as for any other pin, like 0.5 or 0.7 below vcc. I never saw a reason why, but it's definitely a consistent suggestion

Re: [M100] Bitchin' 100 on Bing

I don't know whether to thank you more for fixing the error or for providing the unheard of fantasy of actually getting an answer about something involving a huge faceless uncaring machine! My mental model of this was like, bitchin100 is like a little sandcastle someone built next to the ocean, an

Re: [M100] Bitchin' 100 on Bing

Hi Ken, Feel free to poke around in the archives for source code! ..steve On Monday, November 14, 2022, Ken St. Cyr wrote: > Hi folks – > > > > Long time reader, first time poster 😊 > > > > I work at Microsoft, so I reached out to the Bing team internally to see > if they could help. It looks

Re: [M100] custom key mapping generator for Tandy 200

On 11/14/22 09:12, Brian White wrote: The datasheet says to rest vpp at vcc. Most do, even if elsewhere they also say that writing is disabled as long as vpp is below vpp and the only low limit is pretty much the same as for any other pin, like 0.5 or 0.7 below vcc. derp I mean the low limit

Re: [M100] custom key mapping generator for Tandy 200

On 11/14/22 10:11, Brian K. White wrote: On 11/14/22 09:12, Brian White wrote: The datasheet says to rest vpp at vcc. Most do, even if elsewhere they also say that writing is disabled as long as vpp is below vpp and the only low limit is pretty much the same as for any other pin, like 0.5 or 0

Re: [M100] custom key mapping generator for Tandy 200

"Vpp is below Vpp"? Not sure what you meant there? And "And chip pin 27 pulled to VCC"? ; Since you're talking about Vpp in this post I think you're confusing /PGM (27) with Vpp.(1)? We're not programming, so Vpp should indeed be at Vcc and normally /PGM should indeed be pulled high. To enable t

Re: [M100] custom key mapping generator for Tandy 200

Oops; received this after sending mine. Writes will definitely fail; I'm just curious whether outputs are enabled with /OE low and /PGM also low. On Mon, Nov 14, 2022 at 10:24 AM Brian K. White wrote: > On 11/14/22 10:11, Brian K. White wrote: > > On 11/14/22 09:12, Brian White wrote: > >> The

Re: [M100] Bitchin' 100 on Bing

Thanks Ken! I also submitted a support request yesterday. I appreciate you taking the issue straight to the people who could resolve it. -= Model T's Forever =-

Re: [M100] custom key mapping generator for Tandy 200

On 11/14/22 11:17, Mike Stein wrote: "Vpp is below Vpp"? Not sure what you meant there? Yeah sorry, vpp the pin at a level below vpp the level it's only tech, no need to be unambiguous or anything :) -- bkw

Re: [M100] Tandy Portable Disk Drive 2

Not sure if the TPDD2 model has dip switches, but perhaps they're in the wrong setting? On Mon, Nov 14, 2022 at 8:34 AM Josh Malone wrote: > Are you using the correct bootstrap? (Pdd 1 vs pdd 2) > > I made a video a few years ago showing various failure modes if that helps. > > https://youtu.be/

Re: [M100] custom key mapping generator for Tandy 200

Hello together,   my Tandy 200 (European version, build in 1985) uses main PCB #-PLX178AHIX. This board accepts standard UV-eraseable EPROM 27C256 (32kB) and 27C64 (8kB) 150ns type w/o any modification. Maybe there are other revisions of PCB with different EPROM pinout I´m not aware of. Regards

Re: [M100] custom key mapping generator for Tandy 200

Oh, *that* Vpp... ;-) On Mon, Nov 14, 2022 at 11:38 AM Brian K. White wrote: > On 11/14/22 11:17, Mike Stein wrote: > > "Vpp is below Vpp"? Not sure what you meant there? > > Yeah sorry, vpp the pin at a level below vpp the level > it's only tech, no need to be unambiguous or anything :) > > --

Re: [M100] custom key mapping generator for Tandy 200

Very interesting Georg, Can you take some photos of thr PCB sometime if you happen to have your machine open? It is a bit of a pain to reassemble I know. How did you determine that a 27C64 worked in M13 socket? Besides the obvious that it does work. Because the schematic does not seem to indica

Re: [M100] Tandy Portable Disk Drive 2

At first glance I didn't see any, but could be. I usually fix the obvious first then go back in if necessary - like doctors. Ha. I've got the manual but not a service guide. Thanks. Sent from Yahoo Mail on Android On Mon, Nov 14, 2022 at 11:42 AM, Charlie Hoey wrote: Not sure if the TPDD

Re: [M100] Tandy Portable Disk Drive 2

Yes indeed. TPDD2 does have a little cover for the DIP switch. Just flip it over, it's just the other side from the battery compartment. God Bless, GregS <>< Nov 14, 2022 9:42:45 AM Charlie Hoey : > Not sure if the TPDD2 model has dip switches, but perhaps they're in the > wrong setting?

Re: [M100] custom key mapping generator for Tandy 200

That's what the lengthy discussion with Brian is about; if /OE and /PGM disables data out then a 27C64 should work. Unlikely, but possible; more likely that Georg's board is revised and only uses 2 active-low chip selects. On Mon, Nov 14, 2022 at 11:54 AM Stephen Adolph wrote: > Very interestin

Re: [M100] Bitchin' 100 on Bing

On Mon, Nov 14, 2022 at 11:03 AM Ken St. Cyr wrote: > My pleasure! I’ve been with Microsoft for 18 years now, and I can > honestly say that even though we don’t always have the best public image, > the people inside the company really do care and go out of their way to > help. > > > > FYI, it lo

Re: [M100] Tandy Portable Disk Drive 2

On Mon, Nov 14, 2022 at 11:17 AM Greg Swallow wrote: > Yes indeed. TPDD2 does have a little cover for the DIP switch. Just flip > it over, it's just the other side from the battery compartment. > > God Bless, > > GregS <>< > > > That's my recollection too, that there's a cover. But is there actua

Re: [M100] Tandy Portable Disk Drive 2

Oh my. Checked for cover and assumed DIP under it as the TPDD1 I once had. Opened the TPPD2 lid to expose bright shiney shield. No DIP switches. Never had to change anything so never opened it before now. God Bless, GregS <>< Sent from my iPad > On Nov 14, 2022, at 12:36 PM, John R. Hogerhuis

Re: [M100] Club100 Personal Library

Hey Jason, I just approved your account. You should get an email and be able to use it now. Ken On 11/12/22 2:26 PM, Jason White wrote: Message: 17 Date: Sat, 12 Nov 2022 06:27:39 -0800 From: Ken Pettit mailto:petti...@gmail.com>> To: m100@lists.bitchin100.com

Re: [M100] Tandy Portable Disk Drive 2

On Mon, Nov 14, 2022 at 11:59 AM Greg Swallow wrote: > Oh my. Checked for cover and assumed DIP under it as the TPDD1 I once had. > Opened the TPPD2 lid to expose bright shiney shield. No DIP switches. Never > had to change anything so never opened it before now. > > And my recollection is that m

Re: [M100] Tandy Portable Disk Drive 2

Hmm that's funny. I always wondered why is there a cover there with nothing!  ;-) Now I know. On Monday, November 14, 2022 at 02:59:19 PM EST, Greg Swallow wrote: Oh my. Checked for cover and assumed DIP under it as the TPDD1 I once had. Opened the TPPD2 lid to expose bright shiney sh

Re: [M100] Tandy Portable Disk Drive 2

Ok I popped the hood and YES there is a dip block of four switches and all are off, and yes it's covered by the shield so opening that little door shows just the shiled. If anyone knows how they should be please let me know. Something I did find was the power supply has a white connector that p

Re: [M100] Tandy Portable Disk Drive 2

Found nothing of value when I looked again. I found that on some earlier models (so it appears) it had a physical dip block, but on later models it had four jumpers on SW1 but were soldered (or etched in the board) at the factory and the bottom part of the four switches showed the contacts as o

Re: [M100] Tandy Portable Disk Drive 2

Sorry folks for all the chatter on this. This is my last email on this. If I find a fix I'll share. I haven't been using the T200s all that long, but learned alot. I also learned that the earlier models did in fact have jumpers and when you opened the little door you saw them. Later models you

Re: [M100] Tandy Portable Disk Drive 2

If you don't mind spending a few bucks, maybe Jeff Birt can look at it for you. On the other hand, there are a few better storage options available these days .. m On Mon, Nov 14, 2022 at 10:47 PM Spencer wrote: > Sorry folks for all the chatter on this. This is my last email on this. If > I fi

Re: [M100] Tandy Portable Disk Drive 2

The operation manual is on-line several places. http://tandy.wiki/TPDD I don't think anyone has ever turned up a service manual or programming manual for it yet. I'm confused by what you said earlier. You said you ran the IPL from ram, but, the boot procedure for TPDD2 doesn't require saving