From 4d89947224672535d6e5ed3bfb43fb471edfbb58 Mon Sep 17 00:00:00 2001 From: Nicholas Chin Date: Thu, 20 Apr 2023 11:26:07 -0600 Subject: [PATCH] Add info about E6400 flash size + PCB numbers --- site/docs/hardware/e6400.md | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/site/docs/hardware/e6400.md b/site/docs/hardware/e6400.md index cd5ca3c..8c9cc00 100644 --- a/site/docs/hardware/e6400.md +++ b/site/docs/hardware/e6400.md @@ -65,9 +65,27 @@ We believe all models with iGPU are GM45 and will work perfectly. We suspect that the dGPU models are PM45 and won't work yet, because Libreboot currently supports just the iGPU (Intel graphics) on these machines. -There are two possible flash chip sizes for the E6400: 4MiB (32Mbit) or -2+4MiB (64Mbit). Libreboot presently supports the 4MiB version, and provides -8MiB images for those who upgrade their flash to 8MiB or 16MiB. +There are two possible flash chip sizes for the E6400: 4MiB (32Mbit) or 2+4MiB +(16Mbit+32MBit). Libreboot presently supports the 4MiB version, and provides +8MiB images for those who upgrade their flash to 8MiB or 16MiB. There appears +to be several possible mainboard PCBs for the E6400, which we believe mostly +affects the GPU configuration and the number of available SPI flash footprints: + +- LA-3801P: iGPU, possibly dual SPI (however only one may be populated) +- LA-3803P: dGPU, dual SPI (however only one may be populated) +- LA-3805P: iGPU, single SPI flash (4MiB) +- LA-3806P: dGPU, unknown SPI configuration (likely at least 4MiB) + +These PCB numbers can be found either under the black plastic in the RAM slots +on the bottom (CPU side) of the board, the top left corner near the VGA port +(top side, under the keyboard and palmrest), or near the CPU backplate (only +requires removal of the keyboard). + +We believe that all boards will have at least a single 4MiB flash chip, +regardless of the number of SPI footprints. This is likely the most common +configuration on most available systems. The 2+4MiB configuration likely +would have only been used on systems with full Intel ME firmware with AMT +functionality, though this configuration has not yet been encountered. Most people will want to use the 4MiB images.