Random Chihiro Type-3 Info Thread

[whatnot]

you've been already told - firmware programmed inside of ASIC (NEC V850 CPU with flash), and there is no known ways to manually reprogram it.

for sure there should be the way to (re)program it, for case when new PCB was manufactured at factory and ASIC have no any firmware yet. but, it's unknown. good luck trying to contact Sega and ask how to do that

Simply false. How do you think CF flash hacks are used? It isn't by modifying segaboot.

 

[whatnot]

Any idea if I were to copy the TSOP flash IC from a working unit, copy it and replace it on the failed unit if it would work?

You can try that yes, there's no data that's tied to the system beyond the SN which can be changed easily. Would suggest using the one that's in MAME just to be safe if you go down that route.

Any idea if the .asic files are used every boot? Like it programs FPGA inside ASIC with that data every startup and if it's corrupted board no communicate?

They are, yes. But what I'm confused by is the firmware updater *only* touches the second half of the flash, it does not fully reprogram the image. Should ideally it should, if corrupted, switch back to the 1st half -- aka the backup versions. Why it's not happening in your case? Not sure.

As for replacing the DIMM sockets, that wouldn't cause the communication error, you'd only have an issue when trying to boot a game, or running the system test.

 

[MetalliC]

Simply false. How do you think CF flash hacks are used? It isn't by modifying segaboot.

false what exactly? yes, I'm aware of CF vendor check is in firmware.asic

 

[whatnot]

Just adding board scan of Type-3 net board.

Full size images and more are: https://installgentoo.net/~wutno/sega/

If anyone has any dead mediaboard's or baseboard I'd love to buy(for shipping) to scan them.

 

[yaladre]

Figured out how to get debug output from the netdimm on Chihiro, flip JP3 & JP4 to 1/2, default they will be in 2/3 and set your serial client to 115200N8.

Here's a output log of the Chihiro booting and then me going into the test menu and running the network test.
https://pastebin.com/EbwCLGg0

And here is me sending a game and the game booting.
https://pastebin.com/6kchWRA2

Doesn't seem to accept any inputs but who knows.


I've tried looking at getting any output from the Xbox side of things, my idea was the unpopulated DB9 on the base board with the 2 jumpers set to 1/2 but there's no output at all, it's possible this is actually an input. You could also set this to be 2/3 but it's missing 2 jumper resistors and likely a set of 2 chips found elsewhere on the board called "N11" and "P11".

interested to know if anyone's confirmed if JP3&4 also enable serial on the type3's media board.