Compaq AlphaPC 164LX - Manual (Page 21)

AlphaPC 164LX Jumper Configuration 3–3
Boot Option Jumper (CF7)
3.3 Boot Option Jumper (CF7)
The boot option jumper is located at J27–23/24 (CF7). The default position for this
jumper is out (Figure 3–1). This jumper selects the image to be loaded into memory
from the system flash ROM. With the jumper out, the SRM Console firmware is
loaded. With the jumper in, the fail-safe booter is loaded. For more information
about the fail-safe booter, refer to Section 8.4.
3.4 Flash ROM Update Jumper (J28)
When J28–2/3 are jumpered together (default), the flash ROM is write-enabled.
When J28–1/2 are jumpered together, the flash ROM is write-protected.