From reganrs at communicomm.com Wed Jul 5 02:45:19 2006 From: reganrs at communicomm.com (Robert Regan) Date: Tue, 4 Jul 2006 21:45:19 -0500 Subject: [P112] Troubleshooting P112 Message-ID: <000601c69fdd$0eaff840$cc00a8c0@HOME.LOCAL> Hello all, I assembled a P112 kit over the weekend. No problems with assembly but am having problems getting it running. I don't see any activity on the serial port P4. TxD never changes and I never see DTR go low. Looking closer I see Applying reset causes addr/data to hi-z Both Y1 & Y2 are running /IOCS stays high /RAMCE stays high Live stays low /IOR & /IOW @ FDC37C665 stay high Anyone seen a behavior like this? I haven't verified the ROM yet. Thanks, Robert From p112 at solivant.com Wed Jul 5 02:53:03 2006 From: p112 at solivant.com (Geoff Harrison) Date: Tue, 04 Jul 2006 21:53:03 -0500 Subject: [P112] Troubleshooting P112 In-Reply-To: <000601c69fdd$0eaff840$cc00a8c0@HOME.LOCAL> References: <000601c69fdd$0eaff840$cc00a8c0@HOME.LOCAL> Message-ID: <44AB298F.10704@solivant.com> Robert Regan wrote: > Hello all, > I assembled a P112 kit over the weekend. No problems with assembly but > am having problems getting it running. I don't see any activity on the > serial port P4. TxD never changes and I never see DTR go low. > Looking closer I see > Applying reset causes addr/data to hi-z > Both Y1 & Y2 are running > /IOCS stays high > /RAMCE stays high > Live stays low > /IOR & /IOW @ FDC37C665 stay high > > Anyone seen a behavior like this? > I haven't verified the ROM yet. I have _identical_ symptoms on a P112 I assembled this weekend. I don't have anything to read the ROM with, so I was in the process of hooking it to a Parallax Stamp to dump its contents, but that won't test whether there are any timing issues with it. Geoff Harrison p112 at solivant.com From reganrs at communicomm.com Wed Jul 5 03:56:54 2006 From: reganrs at communicomm.com (Robert Regan) Date: Tue, 4 Jul 2006 22:56:54 -0500 Subject: [P112] Troubleshooting P112 References: <000d01c69fe0$d61c56f0$6401a8c0@terry1> Message-ID: <000801c69fe7$0ea899b0$cc00a8c0@HOME.LOCAL> >> From: p112-bounces at lists.feedle.net >> [mailto:p112-bounces at lists.feedle.net] >> On Behalf Of Geoff Harrison >> Sent: Tuesday, July 04, 2006 10:53 PM >> To: P112 single-board computer users list >> Subject: Re: [P112] Troubleshooting P112 >> >> Robert Regan wrote: >> > Hello all, >> > I assembled a P112 kit over the weekend. No problems with assembly but >> > am having problems getting it running. I don't see any activity on the >> > serial port P4. TxD never changes and I never see DTR go low. >> > Looking closer I see >> > Applying reset causes addr/data to hi-z >> > Both Y1 & Y2 are running >> > /IOCS stays high >> > /RAMCE stays high >> > Live stays low >> > /IOR & /IOW @ FDC37C665 stay high >> > >> > Anyone seen a behavior like this? >> > I haven't verified the ROM yet. >> I have _identical_ symptoms on a P112 I assembled this weekend. I don't >> have anything to read the ROM with, so I was in the process of hooking >> it to a Parallax Stamp to dump its contents, but that won't test whether >> there are any timing issues with it. >> >> Geoff Harrison >> p112 at solivant.com >> > >Robert, Geoff, > > (I tried sending this through the P112 server, but my regular e-mail is >goofed up. You'll probably see it there later tonight or tomorrow.) > > Your problem sounds similar in most respects to a problem that has >affected a very small number of P112 mainboards, but there are a couple of >differences. > > You said that reset causes addr/data to go to hi-z. Is that WHEN reset > is >pressed, or ALL THE TIME after power up/reset? > > The difference is critical. The P112 does a memory test prior to doing >anything else. If it doesn't find any memory, it does a HALT - which >forces >addr/data lines to h-z. > > (The reality is that the addr/data lines are active for a few >milliseconds, and then the system halts and they go to hi-z.) > > If this is happening, nothing else can happen, and this is the first > thing >the P112 does on power-up/reset. > > > The problem that a very few mainboards have is an open circuit between > the >Z80182 pin 51 and U11, pin 15. This should be a direct connection, but a >few boards have an open in a via under U8. > > Use a multimeter to read between the pins. If it reads open (infinite >resistance), you'll need to solder in a jumper to replace the open trace. > > If this doesn't solve your problems, I'll be more than happy to help with >further troubleshooting. > > >Regards, > >Terry Hi Terry, I've checked and have continuity between Z80182 pin 51 and U11 pin 15. Also, the addr/data lines go hi-z only while the reset is active. After release I see activity on both addr and data lines. My next step would be to burn a eprom with the monitor code and replace the flash rom. I'm unsure of which hex file I should load. Thanks, Robert From p112 at solivant.com Wed Jul 5 12:51:12 2006 From: p112 at solivant.com (Geoff Harrison) Date: Wed, 05 Jul 2006 07:51:12 -0500 Subject: [P112] Troubleshooting P112 In-Reply-To: <000801c69fe7$0ea899b0$cc00a8c0@HOME.LOCAL> References: <000d01c69fe0$d61c56f0$6401a8c0@terry1> <000801c69fe7$0ea899b0$cc00a8c0@HOME.LOCAL> Message-ID: <44ABB5C0.4030005@solivant.com> Robert Regan wrote: > Hi Terry, > I've checked and have continuity between Z80182 pin 51 and U11 pin 15. > Also, the addr/data lines go hi-z only while the reset is active. > After release I see activity on both addr and data lines. > My next step would be to burn a eprom with the monitor code and > replace the flash rom. I'm unsure of which hex file I should load. > > Thanks, > Robert > Terry, could the ROM have been generated incorrectly? I managed to dump the first 2kB of mine and I would expect the first byte to be a jump, but it isn't. And at 0x4c0 there is the string "VeRsIoN=Artisoft RPL BootROM v1.00". That doesn't seem right. Robert, do you have the ability to reflash the ROM? If Terry could sent you the correct code, that might be the quickest way to see if that's the problem. Geoff Harrison p112 at solivant.com From reganrs at communicomm.com Wed Jul 5 13:48:44 2006 From: reganrs at communicomm.com (Robert Regan) Date: Wed, 05 Jul 2006 13:48:44 GMT Subject: [P112] =?utf-8?q?Troubleshooting_P112?= Message-ID: <200607050948514.SM04820@24.143.0.41> An HTML attachment was scrubbed... URL: From reganrs at communicomm.com Wed Jul 5 14:43:54 2006 From: reganrs at communicomm.com (Robert Regan) Date: Wed, 05 Jul 2006 14:43:54 GMT Subject: [P112] =?utf-8?q?Troubleshooting_P112?= Message-ID: <200607051043217.SM08192@24.143.0.41> > -----Original Message----- > From: "Geoff Harrison" > Sent 7/5/2006 8:51:12 AM > To: "Robert Regan" > Cc: tgcons at cfl.rr.com, p112 at lists.feedle.net > Subject: Re: [P112] Troubleshooting P112 > > Robert Regan wrote: > > Hi Terry, > > I've checked and have continuity between Z80182 pin 51 and U11 pin 15. > > Also, the addr/data lines go hi-z only while the reset is active. > > After release I see activity on both addr and data lines. > > My next step would be to burn a eprom with the monitor code and > > replace the flash rom. I'm unsure of which hex file I should load. > > > > Thanks, > > Robert > > > > Terry, could the ROM have been generated incorrectly? I managed to dump > the first 2kB of mine and I would expect the first byte to be a jump, > but it isn't. And at 0x4c0 there is the string "VeRsIoN=Artisoft RPL > BootROM v1.00". That doesn't seem right. > > Robert, do you have the ability to reflash the ROM? If Terry could sent > you the correct code, that might be the quickest way to see if that's > the problem. > > Geoff Harrison > p112 at solivant.com > Very interesting! Sounds like we might have a ROM mix up. Yes, I can reflash the ROM. Terry has offered to send me the image. Robert From dgriffi at cs.csubak.edu Sun Jul 9 22:07:07 2006 From: dgriffi at cs.csubak.edu (David Griffith) Date: Sun, 9 Jul 2006 15:07:07 -0700 (PDT) Subject: [P112] Current inventory Message-ID: I currently have 17 kits left in stock. I've exhausted by inventory of LT1133 chips and will be ordering more soon. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? From dgriffi at cs.csubak.edu Wed Jul 26 09:10:10 2006 From: dgriffi at cs.csubak.edu (David Griffith) Date: Wed, 26 Jul 2006 02:10:10 -0700 (PDT) Subject: [P112] manual rebuilt Message-ID: I've rebuilt the P112 manual at http://www.cs.csubak.edu/~dgriffi/proj/p112/. If your copy of the manual looks weird in your PDF reader for whatever reason, try this new one. Nothing has changed. I just upgraded my LaTeX install and rebuilt the PDF. An unnamed blind person has confirmed that this rebuild is readable whereas the previous one wasn't -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? From rivie at ridgenet.net Thu Jul 27 01:27:26 2006 From: rivie at ridgenet.net (Roger Ivie) Date: Wed, 26 Jul 2006 18:27:26 -0700 (PDT) Subject: [P112] manual rebuilt In-Reply-To: References: Message-ID: On Wed, 26 Jul 2006, David Griffith wrote: > I've rebuilt the P112 manual at > http://www.cs.csubak.edu/~dgriffi/proj/p112/. If your copy of the manual > looks weird in your PDF reader for whatever reason, try this new one. > Nothing has changed. OK, I've copied it over to my mirror. Dave, did you do a .PS version as well? I get a 404 error when I attempt to fetch the postscript. -- roger ivie rivie at ridgenet.net From dgriffi at cs.csubak.edu Thu Jul 27 01:31:33 2006 From: dgriffi at cs.csubak.edu (David Griffith) Date: Wed, 26 Jul 2006 18:31:33 -0700 (PDT) Subject: [P112] manual rebuilt In-Reply-To: References: Message-ID: On Wed, 26 Jul 2006, Roger Ivie wrote: > On Wed, 26 Jul 2006, David Griffith wrote: > > I've rebuilt the P112 manual at > > http://www.cs.csubak.edu/~dgriffi/proj/p112/. If your copy of the manual > > looks weird in your PDF reader for whatever reason, try this new one. > > Nothing has changed. > > OK, I've copied it over to my mirror. > > Dave, did you do a .PS version as well? I get a 404 error when I attempt > to fetch the postscript. Fixed! -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? From rivie at ridgenet.net Thu Jul 27 04:07:07 2006 From: rivie at ridgenet.net (Roger Ivie) Date: Wed, 26 Jul 2006 21:07:07 -0700 (PDT) Subject: [P112] manual rebuilt In-Reply-To: References: Message-ID: On Wed, 26 Jul 2006, David Griffith wrote: > On Wed, 26 Jul 2006, Roger Ivie wrote: >> >> Dave, did you do a .PS version as well? I get a 404 error when I attempt >> to fetch the postscript. > > Fixed! Thanks! I've now picked up the postscript as well. -- roger ivie rivie at ridgenet.net From dgriffi at cs.csubak.edu Thu Jul 27 06:50:00 2006 From: dgriffi at cs.csubak.edu (David Griffith) Date: Wed, 26 Jul 2006 23:50:00 -0700 (PDT) Subject: [P112] manual rebuilt In-Reply-To: References: Message-ID: On Wed, 26 Jul 2006, Roger Ivie wrote: > On Wed, 26 Jul 2006, David Griffith wrote: > > On Wed, 26 Jul 2006, Roger Ivie wrote: > >> > >> Dave, did you do a .PS version as well? I get a 404 error when I attempt > >> to fetch the postscript. > > > > Fixed! > > Thanks! I've now picked up the postscript as well. Would you please replace the index.html file too? It's at least six months out of date. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? From rivie at ridgenet.net Fri Jul 28 21:39:50 2006 From: rivie at ridgenet.net (Roger Ivie) Date: Fri, 28 Jul 2006 14:39:50 -0700 (PDT) Subject: [P112] manual rebuilt In-Reply-To: References: Message-ID: On Wed, 26 Jul 2006, David Griffith wrote: > Would you please replace the index.html file too? It's at least six > months out of date. Done. I also snagged news.txt while I was at it. -- roger ivie rivie at ridgenet.net