Re: XO1.75
Based on memory, 00 means fault in RAM. Replace RAM. Could also be electrostatic damage to CPU or RAM. Could also be age degradation of silicon chips. To find the real meaning of 00 takes reading the C code of the CForth startup payload, which is loaded from SPI Flash. There is no involvement of eMMC or SD card slots. On Sat, Jun 06, 2020 at 11:41:33AM +, Yioryos Asprobounitis wrote: > Hi list > I dug out my XOs to check their condition and my XO-1.75 (SKU203) refuses to > boot as if it was wiped out clean or has no microSD card at all. > The screen comes up and nothing further. > Firmware check just show a double zero [00] > Trying to install a fresh OS from USB fails (with the same double zero) > A fast wiki search did not come up with anything relevant. > If someone can point me to the right direction I would appreciate it. > Thanks > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel -- James Cameron http://quozl.netrek.org/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO1.75 - Devel Digest, Vol 155, Issue 1
Message: 1 Date: Sat, 6 Jun 2020 11:41:33 + (UTC) From: Yioryos Asprobounitis To: "devel@lists.laptop.org" Subject: XO1.75 Message-ID: <2133017554.128519.1591443693...@mail.yahoo.com> Content-Type: text/plain; charset=UTF-8 Hi list I dug out my XOs to check their condition and my XO-1.75 (SKU203) refuses to boot as if it was wiped out clean or has no microSD card at all. The screen comes up and nothing further. Firmware check just show a double zero [00] Trying to install a fresh OS from USB fails (with the same double zero) A fast wiki search did not come up with anything relevant. If someone can point me to the right direction I would appreciate it. Thanks -- Message: 2 Date: Sat, 06 Jun 2020 05:37:38 -0700 From: pe...@easthope.ca To: devel@lists.laptop.org Subject: Re: XO1.75 Message-ID: From: Yioryos Asprobounitis Date: Sat, 6 Jun 2020 11:41:33 + (UTC) > The screen comes up and nothing further. ESC doesn't give the prompt of the Forth PROM? > Firmware check just show a double zero [00] Hardware diagnostics? Rocker left cheat code. http://wiki.laptop.org/go/Cheat_codes Regards, ... Peter E. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140 Bcc: peter at easthope. ca Thank you Peter, But there is no way to get to the Forth PROM or get hardware diagnostics or anything on the screen other that the 2 big zeros mentioned above. Looks like there is no firmware in this machine! As if the eMMC is wiped clean or missing. This XO has a serial port connection attached Any diagnostics through this? Thanks PS: Sorry for the miss formatted response. My mailer is not list-friendly ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: XO1.75
From: Yioryos Asprobounitis Date: Sat, 6 Jun 2020 11:41:33 + (UTC) > The screen comes up and nothing further. ESC doesn't give the prompt of the Forth PROM? > Firmware check just show a double zero [00] Hardware diagnostics? Rocker left cheat code. http://wiki.laptop.org/go/Cheat_codes Regards,... Peter E. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140Bcc: peter at easthope. ca ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
