If buffer is placed in bss then it will be zero'ed out during the start-up procedure. GUIX performs rendering through GUIX Adaptation Framework (sf_el_gx) which knows the addresses of the frame buffers (they're provided in the properties for sf_el_gx). If buffers are placed in sdram, then they're not initialized. GUIX will perform initial rendering upon executing gx_system_start. All subsequent renderings are incremental and GUIX Adaptation Framework performs a copy between buffers to use one for rendering while the other is displayed. Regards
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