Forum RSS Feed Follow @ Twitter Follow On Facebook

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
[-]
Welcome
You have to register before you can post on our site.

Username:


Password:





[-]
Latest Threads
issues dumping bios
Last Post: Mrgraysky
Today 06:56 PM
» Replies: 0
» Views: 6
[REQUEST] Lenovo Z410 & Z510 (8DCNxxWW) ...
Last Post: bishoy
Today 01:35 PM
» Replies: 499
» Views: 212002
[REQUEST] ThinkPad E15 Gen 2 - BIOS Upda...
Last Post: Ronin314Clear
Yesterday 06:19 PM
» Replies: 0
» Views: 175
[REQUEST] Asus Zenbook (UM535QE) Bios M...
Last Post: Bravo6
Yesterday 03:41 AM
» Replies: 0
» Views: 279
OptiPlex 360 380 760 780 960 Xeon LGA 77...
Last Post: LoFabio
Yesterday 03:38 AM
» Replies: 265
» Views: 331263
[REQUEST] Asus G614JV BIOS Unlock
Last Post: Mrgraysky
Yesterday 01:02 AM
» Replies: 0
» Views: 202
[REQUEST] HP Compaq nx6120 WiFi Whitelis...
Last Post: Maxinator500
07-16-2025 09:24 PM
» Replies: 1
» Views: 276
[REQUEST] Acer Nitro 5 AN517-52 BIOS Unl...
Last Post: Dudu2002
07-16-2025 03:50 AM
» Replies: 24
» Views: 10620
[REQUEST] Acer Nitro ANV15-51 BIOS Unloc...
Last Post: Dudu2002
07-16-2025 01:14 AM
» Replies: 3
» Views: 238
[REQUEST] Lenovo Yoga S940-14IIL (BQCNxx...
Last Post: Dudu2002
07-15-2025 03:09 AM
» Replies: 1
» Views: 442
[REQUEST] Lenovo G400S (7BCNxxWW) Whitel...
Last Post: helrobsil
07-14-2025 09:10 PM
» Replies: 217
» Views: 112991
[REQUEST] Lenovo Ideapad S510p (89CNxxWW...
Last Post: Dudu2002
07-14-2025 12:04 PM
» Replies: 181
» Views: 92263
[REQUEST] GA-8I865GME-775-RH (rev. 3.9) ...
Last Post: DeathBringer
07-14-2025 01:48 AM
» Replies: 3
» Views: 714
i7 2860QM how to raise power limit?
Last Post: DeathBringer
07-13-2025 07:43 AM
» Replies: 12
» Views: 933
[REQUEST] Dell Wyse 3040: CSM enable for...
Last Post: mm400
07-13-2025 05:58 AM
» Replies: 1
» Views: 840
[REQUEST] Acer TravelMate 5760(G,Z) BIOS...
Last Post: quibic
07-12-2025 01:03 AM
» Replies: 49
» Views: 26946
Asus P8Z77-M RT-d Unlock
Last Post: cbaldwin1
07-11-2025 04:21 PM
» Replies: 0
» Views: 626
[REQUEST] Lenovo Yoga 530-14ARR (8MCNxxW...
Last Post: Dudu2002
07-11-2025 02:04 PM
» Replies: 4
» Views: 3300
[REQUEST] Gigabyte GA-X99P-SLI BIOS with...
Last Post: DKisCRUSHIN
07-11-2025 09:50 AM
» Replies: 0
» Views: 649
Acer Aspire 5920G - Requesting Modded BI...
Last Post: EbrahimSiami
07-10-2025 02:56 PM
» Replies: 1
» Views: 557

SPI bios saviour
#1
IMPORTANT Warning : I have not tested this idea, but I post it here. I am not liable for any damages. You do anything on your own risk

Surfing the Net about SPI port on my MB have found a very curious post.
In the comments it was discussed that it is possible to connect an additional flash chip t mb.
1 SPI memory has 8 pins. We are especially interested in 2 ones:
CS# and HOLD#.
Signal I/O Description
SO - data output.
SI - data input.
SCK - clock.
#CS - Chip select. Active chip must have it pulled down, all other chips must have it pulled up.
#HOLD - when pulled down (falling edge) , stops any communication and waits for rising edge. Beetween it the state is stored.

#W - protects the memory area specified by Status Register bits BP2:BP0 when pulled down.
V_CC - power.
GND - ground.


SPI chips can be connected parallelily, active chip is selected using CS.

Some MB has an SPI port connected to pins of the memory chip. You can buy additional SPI microschemes and create a PCB of such design:
[Image: B4m7pwF.png]
In the top is JSPI1 connector of mb where #HOLD of chip on MB (the most left pin of connector on the picture) is grounded (it seems we need to put here a resistor to prevent shortcut).
The memory chips on PCB are connected to SPI, and upper chip is selected.
#CS of JSPI1 is already grounded because main system bios is already selected, but groundring #HOLD we disabled it and can use the enabled chip on PCB instead of it.
find
quote


Forum Jump:


Users browsing this thread: 1 Guest(s)