PS2 Mechacon version boot checks?

[heathy1337]

Hello there guys!

I have a PS2 slim 70000 series that I have successfully restored the ide bus on

I then moved on to replaced the bios BOOTROM chip with one taken from a 50000 series

This resulted in a 70000 series slim that can boot FHDB - no modchip, no memory card, just straight into FHDB.

However, this breaks optical disc reading, audio cd, ps1, PS2 games, nothing is detected.

I suspect this is due to the Mechacon checking BOOTROM version against Mechacon version and now being mismatched due to my effective downgrade of BOOTROM

Would be nice to restore disc drive function too if possible

Is it possible to fix this? I noticed Mechacon controller IC between 50k and 70k series are both the same parts number and apparently both have the same ROM, it's just the writable eeprom portion of the Mechacon that differs between them

 

[TnA]

No, 50k has BOOT-ROM version 1.70 - 1.90 and 70k-Slim has 2.00!

 

[heathy1337]

I know - that's why I chose that BOOTROM to re-enable FHDB

Is it not possible to make changes to Mechacon to restore dvd function?

If not, what about moving Mechacon controller bga chip from 50k also?

 

[TnA]

I know

Your own sentence disagrees with that claim.

and apparently both have the same ROM,

SEE?
...but I guess you mean the chip instead of the BOOT-ROM Version.

Is it not possible to make changes to Mechacon to restore dvd function?

I doubt it, but not sure!

If not, what about moving Mechacon controller bga chip from 50k also?

IDK.

 

[heathy1337]

I managed to get this working! - i tried another bootrom from a fresh 50k series

Now have 70k series slim that can boot from FHDB over IDE + also a fully working dvd drive

here is printout from working combination console if anyone was following this:

Log file generated by Playstation 2 Ident v0.850, built on Jun 3 2022 07:06:51

ROMVER: 0190JC20030822
ROM region sizes:
ROM0: 0xBFC00000 (4097649 bytes)
ROM1: 0xBE000000 (407170 bytes)
ROM2: <Not detected>
EROM: 0xBE100000 (3145728 bytes)
ROM chip sizes:
Boot ROM: 0x1FC00000 (32 Mbit) CRC16: 0xfa1e
DVD ROM: 0x1E000000 (32 Mbit) CRC16: 0x6f05
DVD Player: 3.02
OSDVer: 0190Jjpn
PS1DRV: 1.02
EE/GS:
Implementation: 0x2e
Revision: 3.1 (CXD9708GB/CXD9832GB)
EE_F520: 0x00003101
EE_F540: 0x002c1812
EE_F550: 0x0088e0a4
FPU implementation: 0x2e
FPU revision: 3.0
ICache size: 0x02 (16 KB)
DCache size: 0x01 (8 KB)
RAM size: 33554432 bytes
GS revision: 1.11 (CXD2949CGB/CXD2949DGB)
GS ID: 0x55
IOP:
Implementation: 0x00
Revision: 2.4 (CXD9798GP/CXD9799AGP)
RAM size: 2097152 bytes
SSBUS I/F revision: 3.2 (CXD2955R)
AIF revision: <Not detected>
MECHACON:
Revision: 6.04 (CXR716080-103GG)
MagicGate region: 0x00 (Japan)
System type: 0x00 (PlayStation 2)
DSP revision: 3 (CXD3098Q/CXD1886Q-1/CXD3098AQ)
M Renewal Date: 2004/12/10 01:30
Mainboard:
Model name: SCPH-70000
Mainboard model: Sticker
Chassis: Sticker
ROMGEN: 0822-2003
Machine type: 0x00000000
BoardInf: 0x00 (Not detected)
MPU Board ID: 0xffff
SPU2 revision: 0x10 (CXD2955R)
ADD0x010: 0xbc2b (Unknown)
i.Link Model ID: 0x20d438 (Sticker)
Console Model ID: 0x37
SDMI Company ID: 12-04-d4
EMCS ID: 0x30 (SZMT)
Serial range: 056xxxx
USB HC revision: 1.0
DEV9:
MAC vendor: 00:13:15
SPEED revision: 0x0013 (CXD9731GP)
SPEED capabilities: 000b.0002 (SMAP, ATA, UART)
PHY OUI: 0x070100 (ST Microelectronics)
PHY model: 0x01 (STE100S)
PHY revision: 0x01
i.Link:
Ports: 2
Max speed: 2 (S400)
Compliance level: 248 (Unknown)
Vendor ID: 0x000000 (Unknown)
Product ID: 0x000000