It is currently Sat Dec 15, 2018 3:50 pm

All times are UTC - 7 hours



Forum rules





Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Tue Apr 03, 2018 4:00 am 
Offline

Joined: Sun Dec 02, 2012 8:17 am
Posts: 500
Location: East Texas
Just a FYI.

In my research of making the Far East of Eden translation cart, I found this error.
Pin80 of the SPC7110 ic is ground, not vcc as indicated. The other pins appear to be correct.

Here is the no-cash document
Attachment:
IMG_1578.PNG
IMG_1578.PNG [ 145 KiB | Viewed 1388 times ]


Top
 Profile  
 
PostPosted: Tue Apr 03, 2018 11:57 am 
Offline

Joined: Fri Feb 24, 2012 12:09 pm
Posts: 732
Thanks! Good finding!

I don't remember where I got the pinouts from - probably from this doc http://www.romhacking.net/documents/%5B ... 110F0a.txt made by Kammedo.

Looking at SHVC-LDH3C-01 board photos (with RTC)... yeah, looks as if pin 80 and 81 wired to different supply voltage lines.
Oh, but wait! There's also a SHVC-BDH3B-01 board photo (without RTC)... and that has pin 80 wired differently (there's no visible connection on the photo, but it does probably connect to something underneath of the chip, maybe to VCC (?) so the pinout would be correct for that board).

Both boards are HiROM, if one has Pin80 wired to VCC, and the other to GND... then it might be related to presence/absence of the RTC chip... or to the used ROM sizes.

PS. No, don't convert fullsnes.htm from 80 column 20 lines plain ascii to 1136x640 pixel 145 Kbyte png format! That's abuse.


Top
 Profile  
 
PostPosted: Tue Apr 03, 2018 2:03 pm 
Offline

Joined: Sun Dec 02, 2012 8:17 am
Posts: 500
Location: East Texas
nocash wrote:
Thanks! Good finding!

I don't remember where I got the pinouts from - probably from this doc http://www.romhacking.net/documents/%5B ... 110F0a.txt made by Kammedo.

Looking at SHVC-LDH3C-01 board photos (with RTC)... yeah, looks as if pin 80 and 81 wired to different supply voltage lines.
Oh, but wait! There's also a SHVC-BDH3B-01 board photo (without RTC)... and that has pin 80 wired differently (there's no visible connection on the photo, but it does probably connect to something underneath of the chip, maybe to VCC (?) so the pinout would be correct for that board).

Both boards are HiROM, if one has Pin80 wired to VCC, and the other to GND... then it might be related to presence/absence of the RTC chip... or to the used ROM sizes.

PS. No, don't convert fullsnes.htm from 80 column 20 lines plain ascii to 1136x640 pixel 145 Kbyte png format! That's abuse.


Err, sorry. My phone screen shot!

I have both pcb variants and pin 80 on both are tied to ground. I do wonder why they didn't flood that area with that pin in it... but it is what it is ~ which is ground.

Edit: I think it's just ground. I wired in a RTC chip and converted a Non-RTC pcb to run the English TMZ game. It works. I don't think that ground controls anything.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group