#!/bin/bash
# B10 rollback — restore the B9C cache (b9ce13c9, operational since 2026-10-03: B8F + display). Needs 9008 via HW EDL (D+->GND). boot/aboot untouched.
# Deeper rollback: b9/b9c/cache/B9C-rollback.sh (B8F 857c9c30).
cd ~/doc/modem/jz08-aurora || exit 1
L=firehose/007050e100000000_394a2e47cf830150_fhprg_peek.bin ; O=logs/b10/b10b5/rollback ; mkdir -p $O
B=b9/b9c/cache/cache-extlinux-b9c.img
[ "$(sha256sum $B | cut -d' ' -f1)" = b9ce13c9f48e36a5054c0ae3c39dc3f184b1fc2eea1d57d4b8bd8e9ae800a37b ] || { echo "STOP: rollback image hash"; exit 1; }
lsusb | grep -q 05c6:9008 || { echo "STOP: no 9008"; exit 1; }
edl --loader=$L printgpt > $O/00-printgpt.log 2>&1
edl --loader=$L w cache $B > $O/cache-w.log 2>&1
edl --loader=$L r cache $O/cache-rb.bin > /dev/null 2>&1 ; cmp $B $O/cache-rb.bin && echo CACHE_RESTORED_B9C
sha256sum $B $O/cache-rb.bin