Hello Gerald, You remember me? I believe that you put your finger on the right place, some data is saved in the clockchip so far I know! sorry if I am wrong but first get a new battery!
Grtz >*< TOM >*< ----- Original Message ----- From: "Gerald Stap" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, October 12, 2003 6:35 AM Subject: Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging > Does anybody know what happens when the battery for the MSX > clockchip/sram is dead? Because that seems to be the case for my NMS8235 > and is most obvious difference between my NMS8235 and NMS8255. Can it be > possible that that is why the Novaxis won't boot my HD? > Any documentation on the Novaxis would help. > > Gerald Stap wrote: > > > Hi, > > > > After 5 years I finally decided to bring my MSX back to life. But with > > all the external hardware (the slotexpander, scartcables + selector > > for GFX9000, rs232c + external modem, novaxis scsi + harddrive and > > zipdrive) it barely fits on my desk. So I decided to build my NMS8255 > > into a miditower to save space. > > > > NB. Before I built the whole lot into my miditower, everything worked > > fine except for the fact that the gfx9000 and de opl4 couldn't both be > > entered in de gouda slotexpander due to power problems. The setup > > worked with the gfx9000 in slot 1 and the opl4 in the slotexpander > > thouigh. > > > > After I built the whole lot in an miditower a little problem arose > > which has been haunting me for two weeks now. > > > > The problem is that everything works except for the Novaxis. It can > > only find the scsi harddisk but won't boot from it. Instead it exits > > to BASIC. Drive A: is not readable from DOS 2.xx. And physical drive A > > is mapped to drive B. Also the novaxis cannot detect the zipdrive. I > > can not enter the setup menu. It says wait or something, and then the > > computer hangs. > > > > It does not matter if I use cartridge slot 1 or 2 directly or the > > slots in the slot expander. Other cartridges like Kingsvalley 2 or > > my FM-Pak work fine.In fact the whole MSX performs fine unil I attach > > the Novaxis. > > > > The msx-mainboard is now connected to a 150Watt PC-AT powersupply > > which should be sufficient. I checked all the voltages +/-12V and +5V > > on the AT powersupply and they seem to bee correct. This is also the > > case with slot 1+2 and the Gouda slotexpander even with cartridges in > > them. Zip-drive, diskdrive A&B and the SCSI hd now get their power > > directly from the AT powersupply. > > > > My first thoughts were that maybe the Novaxis SCSI interface had a > > defect or I had a bad SCSI chain, but when I put a dos 2.20 cart and > > the Novaxis in the slotecpander, and connect the slotexpander to my > > NMS8235 with doublesided diskdrive, using the SCSI chain in the > > miditower (zip + hd) the Novaxis detects both my HD and zipdrive and > > boots from it. Then everything seems to work ok. I can even enter the > > setup menu. So this rules out a faulty SCSI chain or bad termination. > > > > I even replaced the MSX main board in the miditower with another. But > > still I have the same problem. > > > > Specs board 1: > > Philips MSX2 NMS8255 board with built in dos2.20, fast diskrom 7 mhz > > and 512kB RAM > > > > Specs board 2: > > Philips MSX2 NMS8255 board with built in dos2.20, fast diskrom 7 mhz > > and 256kB RAM > > > > I'm very puzzled. > > Does anybody have any ideas on how to get the novaxis working? what > > are the tolerances of the novaxis? > > > > - Could it be a grounding problem? > > - Is it advisable to supply the slotexpander it's own +/-12V and 5V > > from the AT power supply instead of getting it from the MSX main board > > via slot 1 or 2? > > > > Any help/hints would be greatly apprciated. > > > > Gerald > > > > > > > > > > > > > > > > _______________________________________________ > > MSX mailing list ([EMAIL PROTECTED]) > > Info page: http://lists.stack.nl/mailman/listinfo/msx > > > > > > > _______________________________________________ > MSX mailing list ([EMAIL PROTECTED]) > Info page: http://lists.stack.nl/mailman/listinfo/msx _______________________________________________ MSX mailing list ([EMAIL PROTECTED]) Info page: http://lists.stack.nl/mailman/listinfo/msx
