update t440p script

coreboot-t440p/steps/extract_bios.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+# Step: Extract original BIOS from both EEPROM chips
+
+step_extract_bios() {
+  section "Extract Original BIOS"
+
+  info "The T440p has two EEPROM chips that need to be read:"
+  echo "  - 4MB (top) chip"
+  echo "  - 8MB (bottom) chip"
+  echo ""
+  info "Each chip will be read twice to verify data integrity."
+  warn "Make sure the programmer is attached to the correct chip!"
+
+  cd "$WORK_DIR" || return 1
+
+  # --- 4MB chip ---
+  echo ""
+  info "Attach the programmer to the 4MB (top) chip."
+  prompt_continue
+
+  info "Reading 4MB chip (read 1 of 2)..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -r 4mb_backup1.bin" || return 1
+
+  info "Reading 4MB chip (read 2 of 2)..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -r 4mb_backup2.bin" || return 1
+
+  success "4MB chip reads complete."
+
+  # --- 8MB chip ---
+  echo ""
+  info "Now attach the programmer to the 8MB (bottom) chip."
+  prompt_continue
+
+  info "Reading 8MB chip (read 1 of 2)..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -r 8mb_backup1.bin" || return 1
+
+  info "Reading 8MB chip (read 2 of 2)..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -r 8mb_backup2.bin" || return 1
+
+  success "8MB chip reads complete."
+}