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boot.adoc: mention cd firmware has no debug logging #1

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boot.adoc: mention cd firmware has no debug logging #1

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2 changes: 1 addition & 1 deletion documentation/asciidoc/computers/config_txt/boot.adoc
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Expand Up @@ -9,7 +9,7 @@ These options specify the firmware files transferred to the VideoCore GPU prior

The `start_file` and the `fixup_file` are a matched pair - using unmatched files will stop the board from booting. This is an advanced option, so we advise that you use `start_x` and `start_debug` rather than this option.

NOTE: Cut-down firmware (`start*cd.elf` and `fixup*cd.dat`) cannot be selected this way - the system will fail to boot. The only way to enable the cut-down firmware is to specify `gpu_mem=16`. The cut-down firmware removes support for codecs and 3D as well as limiting the initial early-boot framebuffer to 1080p @16bpp - although KMS can replace this with up to 32bpp 4K framebuffer(s) at a later stage as with any firmware.
NOTE: Cut-down firmware (`start*cd.elf` and `fixup*cd.dat`) cannot be selected this way - the system will fail to boot. The only way to enable the cut-down firmware is to specify `gpu_mem=16`. The cut-down firmware removes support for codecs, 3D and debug logging as well as limiting the initial early-boot framebuffer to 1080p @16bpp - although KMS can replace this with up to 32bpp 4K framebuffer(s) at a later stage as with any firmware.

NOTE: The Raspberry Pi 5 firmware is self-contained in the bootloader EEPROM.

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