Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-12 Thread Gagarin


| I found a 3.6v NiCd 65mAh battery on this website:
|
http://www.allebatterijen.nl/pages/ItemDetails.asp?ArtCode=11033ZA65&HG=Batterijen
| voor computers, diversen.&SG=Ni-Cd computerbatterijen
| But it doesn't say if it is an accu. Just a battery for CMOS. Do you
| think I can use this battery in my NMS8255? (The NMS8255 needs a 3.6v
| 45mAh NiCd accumulator). I've never ordered an MSX replacement accu
| before ;)

I think its pretty safe to say you can use that battery As long as its
only
the mAh thats higher.

Pepijn


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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-12 Thread Jean-Pierre Dubois
Hi
try phone cellular battery (old model) the pack is 3 x 1.2v
found in electronic shop
Jipe
- Original Message -
From: "Gerald Stap" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, October 12, 2003 10:46 PM
Subject: Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw
debugging


> Hi, the latest update;
>
> It seems to be a clockchip problem indeed.
> I booted the msx/novaxis with graph-key pressed and then manually set
>  hostid and targetid with _hostid() and _targetid() from BASIC. This
> allowed me to enter the setup menu after a reset from basic (defusr=0:
> a=usr(0) => do not use the powerswitch as you'll lose the settings!). I
> then enabled multiple devices and it found my zip. After another
> software reboot my hd booted. Yes!
>
> I found a 3.6v NiCd 65mAh battery on this website:
>
http://www.allebatterijen.nl/pages/ItemDetails.asp?ArtCode=11033ZA65&HG=Batt
erijen
> voor computers, diversen.&SG=Ni-Cd computerbatterijen
> But it doesn't say if it is an accu. Just a battery for CMOS. Do you
> think I can use this battery in my NMS8255? (The NMS8255 needs a 3.6v
> 45mAh NiCd accumulator). I've never ordered an MSX replacement accu
> before ;)
>
> Tom Emmelot wrote:
>
> >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
> >>&g

Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-12 Thread Gerald Stap
Hi, the latest update;

It seems to be a clockchip problem indeed.
I booted the msx/novaxis with graph-key pressed and then manually set 
hostid and targetid with _hostid() and _targetid() from BASIC. This 
allowed me to enter the setup menu after a reset from basic (defusr=0: 
a=usr(0) => do not use the powerswitch as you'll lose the settings!). I 
then enabled multiple devices and it found my zip. After another 
software reboot my hd booted. Yes!

I found a 3.6v NiCd 65mAh battery on this website:
http://www.allebatterijen.nl/pages/ItemDetails.asp?ArtCode=11033ZA65&HG=Batterijen 
voor computers, diversen.&SG=Ni-Cd computerbatterijen
But it doesn't say if it is an accu. Just a battery for CMOS. Do you 
think I can use this battery in my NMS8255? (The NMS8255 needs a 3.6v 
45mAh NiCd accumulator). I've never ordered an MSX replacement accu 
before ;)

Tom Emmelot wrote:

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







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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Tom Emmelot
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
> >
> >
>
>
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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Gerald Stap

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.
I meant the battery for the 8255 is dead.

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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Gerald Stap
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







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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Jean-Pierre Dubois
hi
gouda slot expander have many litle problem with philips (i have 8280)
try to loaded the bus of the slot expander with one or two cartridge (slot
select not actived) and change the scsi in all sub-slot
try to clean the connector of the cartridge of slot expander
one of my  sub-slot don't accept gouda scsi and mega-sram (corrupt datas)
but work with other cartrige
a long ribbon cable pertub the bus
i have sunrise slot expander with my turbo-r and i have not this problem
just if power of slot expander (pc xt powersupply) is not actived in the
same time of the turbo-r i have blank screen
i have just added a power switch and don't cut the swicth of powersupply of
the turbo-r and of the pc xt powersupply

220v  =)---o__o-I---(= =)-- turbo-r
   I---(=
=)-- pc xt powersupply slot expander
Jipe

- 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
>

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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Hans-Peter Zeedijk
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
>
>
>
>
>
>
>
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Re: [MSX] Novaxis Problems on Philips NMS8255 help wanted hw debugging

2003-10-11 Thread Laurens Holst
Gerald Stap wrote:
> I'm very puzzled.
> Does anybody have any ideas on how to get the novaxis working? what
> are the tolerances of the novaxis?

I have no clue, but...


> - 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?

In think this is indeed advisable ^_^.


~Grauw (who still needs to connect his slot expander to a psu, so that the
gfx9000 will work ok)

---
Ushiko-san! Kimi wa doushite, Ushiko-san nan da!!

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