Can't help you: I have novaxis/gouda SCSI and Gouda Slotexpander on a Turbo R and even with an extra IDE controller and Harddisk, everyhing works. (ZIP and HD's on external Powersupply, slotexpander no external power.) In my other MSX (In big PC Desktopcase) I have everything powered from a PC powersupply. (also MSX itself) (HD, ZIP, CDROM, slotexpander with external powerconnector, expander, 8250 2+, 7Mhz, 128Mb) In this configuration I had a problem when copying from one partition to another or to or from ZIP, the MSX stalled after a while. The problem turned out to be the extended cable from the MSX board to it cartridgeslots. After refitting it with original cartridgeslot with cable, all is fine. Greetings, Hapzee
----- Original Message ----- From: "Gerald Stap" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, October 11, 2003 11:40 PM Subject: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging > 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 > > ================================================================ > Deze e-mail is door E-mail VirusScanner van Planet Internet gecontroleerd op virussen. > Op http://www.planet.nl/evs staat een verwijzing naar de actuele lijst waar op wordt gecontroleerd. _______________________________________________ MSX mailing list ([EMAIL PROTECTED]) Info page: http://lists.stack.nl/mailman/listinfo/msx
