Two boards (one for me one for a friend).
50% success rate at the moment.
Board #1 goes HALT. Voltages, clocks are fine. Need more time spendin on this :(. Same chipset works on #2.
Board #2 had seems to be alive ok. Need to complete with all other ports but wanted to quickly see first after #1 problems if this will be ok.
You will not be able to post if you are still using Microsoft email addresses such as Hotmail etc
See here for more information viewtopic.php?f=20&t=7296
See here for more information viewtopic.php?f=20&t=7296
BOOKMARK THIS PAGE !
https://www.exxosforum.co.uk:8085/IP_CHECK/
You can unban yourself if needed. It also sends me reports to investigate the ban.
https://www.exxosforum.co.uk:8085/IP_CHECK/
You can unban yourself if needed. It also sends me reports to investigate the ban.
DO NOT USE MOBILE / CGNAT DEVICES WHERE THE IP CHANGES CONSTANTLY!
At this time, it is unfortunately not possible to whitelist users when your IP changes constantly.
You may inadvertently get banned because a previous attack may have used the IP you are now on.
So I suggest people only use fixed IP address devices until I can think of a solution for this problem!
At this time, it is unfortunately not possible to whitelist users when your IP changes constantly.
You may inadvertently get banned because a previous attack may have used the IP you are now on.
So I suggest people only use fixed IP address devices until I can think of a solution for this problem!
Robson's H5 x 2
-
Robson
- Posts: 143
- Joined: 13 May 2020 16:22
Robson's H5 x 2
You do not have the required permissions to view the files attached to this post.
-
exxos
- Site Admin
- Posts: 28290
- Joined: 16 Aug 2017 23:19
- Location: UK
Re: Robson's H5 x 2
:bravo: :girldance: :girldance: :cheer: :cheer:
-
Robson
- Posts: 143
- Joined: 13 May 2020 16:22
Re: Robson's H5 x 2
On #1 - A23 shorted to gnd. Nothing obvious to notice.
CPU, GLUE, (Blitter if) are using it as far as I know + 5V/3.3v ports. I''m not using the Blitter, socket not added. I have one 64pin socket fitted only (#4).
What 's the best approach to isolate the short? I don't want to make too much mess by cutting, etc.
CPU, GLUE, (Blitter if) are using it as far as I know + 5V/3.3v ports. I''m not using the Blitter, socket not added. I have one 64pin socket fitted only (#4).
What 's the best approach to isolate the short? I don't want to make too much mess by cutting, etc.
-
exxos
- Site Admin
- Posts: 28290
- Joined: 16 Aug 2017 23:19
- Location: UK
Re: Robson's H5 x 2
This kinda thing is why I use a low resistance meter... I will see if I can put up where A23 goes.. might give you some clues..
EDIT:
The only place I can even see GND near it is under the CPU...
EDIT:
The only place I can even see GND near it is under the CPU...
You do not have the required permissions to view the files attached to this post.
-
Robson
- Posts: 143
- Joined: 13 May 2020 16:22
Re: Robson's H5 x 2
Great, thanks. Definitely helped me a lot with the pictures and the tip. I have a low res meter too and dug it out.
Located that the lowest value is the through hole at port #1, so carefully made a cut under the smd glue pin and another under Pin 52 of port #1, cutting that area out. Then linked pin52 of port#3 to the smd glue pin. Values are now ok.
It showed some sort of life briefly, however bombed out and diag cart picture also fell apart and started scrolling + going crazy.
Now back to white screen only but CPU is not halted anymore if no diag cart plugged in. With the diag plugged in it goes low. So still looks like some addressing/decoding problem.
more to come...
Located that the lowest value is the through hole at port #1, so carefully made a cut under the smd glue pin and another under Pin 52 of port #1, cutting that area out. Then linked pin52 of port#3 to the smd glue pin. Values are now ok.
It showed some sort of life briefly, however bombed out and diag cart picture also fell apart and started scrolling + going crazy.
Now back to white screen only but CPU is not halted anymore if no diag cart plugged in. With the diag plugged in it goes low. So still looks like some addressing/decoding problem.
more to come...
You do not have the required permissions to view the files attached to this post.
-
Robson
- Posts: 143
- Joined: 13 May 2020 16:22
Re: Robson's H5 x 2
You do not have the required permissions to view the files attached to this post.
-
olivier.jan
- Site sponsor
- Posts: 338
- Joined: 01 Jun 2020 08:00
Re: Robson's H5 x 2
Did you check if the resistor network (RN7) was soldered in the right direction? Some people, me included, had some SMDs soldered upside-down.
Retro stuff
520 STF/ 1040 STE / Mega ST / 2 Mega STE / 2 H5
2 x 600XL with U1MB /SOFIA 2/ AVG CART / and a few 1050
Apple //c, Commodore 128, Mac Classic, SE/30, LC, IIvi and PB G3 (Clamshell)
Amiga 600 and a few 486 and 386.
Many Nintendo G&W and other electronic games from the late 70s/early 80s.
520 STF/ 1040 STE / Mega ST / 2 Mega STE / 2 H5
2 x 600XL with U1MB /SOFIA 2/ AVG CART / and a few 1050
Apple //c, Commodore 128, Mac Classic, SE/30, LC, IIvi and PB G3 (Clamshell)
Amiga 600 and a few 486 and 386.
Many Nintendo G&W and other electronic games from the late 70s/early 80s.
-
exxos
- Site Admin
- Posts: 28290
- Joined: 16 Aug 2017 23:19
- Location: UK
Re: Robson's H5 x 2
$FFFABA isn't even a valid address..
Nothing should be accessing it, so have you done verify ROM ? Looks like you have PP's modified TOS104 so you really need to try a generic 104 so the diag cart can do a proper checksum on it.
Nothing should be accessing it, so have you done verify ROM ? Looks like you have PP's modified TOS104 so you really need to try a generic 104 so the diag cart can do a proper checksum on it.
You do not have the required permissions to view the files attached to this post.
-
Robson
- Posts: 143
- Joined: 13 May 2020 16:22
Re: Robson's H5 x 2
I have some soldered upside down. I don't think that's an issue here. They seem to be isolated resistors.olivier.jan wrote: 22 Jan 2021 12:37 Did you check if the resistor network (RN7) was soldered in the right direction? Some people, me included, had some SMDs soldered upside-down.
-
DoG
- Posts: 1294
- Joined: 07 Apr 2018 12:26
Re: Robson's H5 x 2
Do you only run with 1Mb or is the diag reporting it wrong?
Who is online
Users browsing this forum: CCBot and 0 guests