NEW BIOS mod (unlock G1)

[OzOnE]

Hi, SWAT, and megavolt85...

Congratulations on finally cracking the HOLLY protection, megavolt85.

I'm really curious to know how you did it, but I'm sure you will tell us one day.


I've tried the no-GDROM BIOS, but I can't get it to boot properly from HDD at all though?

It seems to boot from SD card if I remove the DS folder from the HDD, but then the HDD won't even show in the File Manager?

I've tried re-formatting the HDD with FAT32, and used the BIOS image and DS_CORE.BIN you posted in this thread (over-writing the latest DS_CORE from github).

When I try adding the DS folder to the HDD only, it tries to read at the bootloader stage, but then just freezes?

I've done the 33MHz mod on the DC mobo as well. It's a VA1 PAL model.

The one I'm using has the Dev Box / Link83 boot logo version (DBS).

Has anyone else managed to get the no-GDROM drive version working yet, and which method did you use to bypass the 33MHz requirement?

Can anyone show a DC booting DS from a HDD with the GD drive completely unplugged / removed?

I would really love to get this working, as I want to make a DC laptop soon, or at least a slim DC with no GD drive, and HDMI output.


Have you seen my DC HDMI mod btw?

https://www.youtube.com/user/electronash/videos

[megavolt85]

Hi OzOnE

Цитата:Have you seen my DC HDMI mod btw?

Good job

Цитата:Has anyone else managed to get the no-GDROM drive version working yet, and which method did you use to bypass the 33MHz requirement?

I'm test without GDROM board and without 33MHz

Place Dreamshell to hdd in DS folder, use latest DS_CORE.BIN from Github.
HDD format to FAT32 , primary partation.

Цитата:I'm really curious to know how you did it, but I'm sure you will tell us one day.

I use magic BIOS from the Metallic

[jjaa081620]

I use the CF card works well

[aldair]

(18.05.2015 06:55)jjaa081620 писал(а):  I use the CF card works well

[ands]

aldair good nice collection
it's my 5 dreamcast

2 dreamcast (Bios Mod, G1ATA Mod, Region Changer Mod)other in the queue

[Gillbert]

(18.05.2015 00:49)OzOnE писал(а):  Have you seen my DC HDMI mod btw?
https://www.youtube.com/user/electronash/videos

Great stuff man! I've been following your vids in your YT channel but I didn't know that was you. Do you plan to sell some HDMI converter boards (when they are ready)?

[alimadhi]

please guys tell me how to use 33MHz i have a lots but cant install it on my dreamcast
please diagram or pictures

[megavolt85]

what is crystal you use?

[alimadhi]

(05.07.2015 18:06)megavolt85 писал(а):  what is crystal you use?

33.8688 MHz half oscillator

[megavolt85]

Need ACTIVE crystal or K50-HC0CSE33.8688MR

[alimadhi]

(06.07.2015 15:44)megavolt85 писал(а):  Need ACTIVE crystal or K50-HC0CSE33.8688MR

i have ACTIVE crystal can you please tell me how to install it ? diagram or pictures please
thank you

[megavolt85]

what write on crystal? need for find datasheet

[alimadhi]

its is same this 100%
http://ru.aliexpress.com/item/Into-the-a...01903.html

[megavolt85]

Dreamcast PINOUT

[alimadhi]

(07.07.2015 23:08)megavolt85 писал(а):  

Dreamcast PINOUT

thank you so much i will try to install it and let you know
many thanks

[alimadhi]

i have installed the the ACTIVE crystal but the dreamcast freezing after logo boot

[megavolt85]

what is bios you use?

Without GDROM work only:

Bios for loading DreamShell from HDD or SD, IGR works, start animation from a DevBox, check of gdrom is switched off
and
Bios for loading DreamShell from HDD or SD, IGR works, start animation standard, check of gdrom is switched off
from this topic

[alimadhi]

brother
i use boot_loader_pic12f675.bios

[Gillbert]

(22.07.2015 01:24)alimadhi писал(а):  brother
i use boot_loader_pic12f675.bios

Do you still use the old pic bios mod? This is no longer necessary, you can do a simple bios mod and flash it with the correct bios.

[megavolt85]

boot_loader_pic12f675.bios don't work without GDROM ,read my previous post