Yeah, the Secure->200->Service->Reset is in the AIX 3.2.5 installation guide. One revision of the installation guide says "Reset within 5 secs", another revision says "double tap Reset", regardless, it doesn't change the behavior.
When I power up in Service mode:
...
253 (Service mode IPL from SCSI)
256 (Service mode reset from Ethernet)
260 (Information is displayed on the device console)...which is where it stops until I choose an option
The LED codes correspond to what I'm seeing/hearing from the machine as well. Before the 253 it blips the floppy drive, then during the 256 I see the hard drive blip, then the CD-ROM blip, then when it displays 256 it is attempting to get something from the BOOTP server over ethernet, then stops at 260 when the ROM menu appears:
MAIN MENU
1. Select BOOT (Startup) Device
2. Select Language for these Menus
3. Send Test Transmission (PING)
4. Show Hardware Configuration
5. Perform Built-In Diagnostics
6. Exit Main Menu and Start System (BOOT)
For what it's worth, if I choose 4. Show Hardware Configuration, I get the following:
CURRENT HARDWARE CONFIGURATION
VITAL PRODUCT DATA for Planar (Main Circuit Board)
Planar Part Number . . . . . . . . . . . . . . . . 051G8326
EC(Engineering change) Level . . . . . . . . . . . 00D18234
Processor Identification . . . . . . . . . . . . . 00008691
ROS Version . . . . . . . . . . . . . . . . . . . . VER1.1 LVL0.06
Ethernet Hardware Address . . . . . . . . . . . . . 08005A4D21F8
STANDARD FEATURES
Security Locks for SCSI Bus . . . . . . . . . . . . OFF
Memory . . . . . . . . . . . . . . . . . . . . . . 16 MB
I/O Ports: Keyboard/Speaker, Mouse, Tablet, Serial (2)
Parallel, SCSI, Ethernet, Diskette Controller
PAGE 1 of 4
CURRENT HARDWARE CONFIGURATION
MEMORY
Total memory . . . . . . . . . . . . . . . . . . . 16 MB
Memory Locations:
SIMM Slot A . . . . . . . . . . . . . . . . . . 8 MB
SIMM Slot B . . . . . . . . . . . . . . . . . . 8 MB
SIMM Slot C . . . . . . . . . . . . . . . . . . 0 MB
SIMM Slot D . . . . . . . . . . . . . . . . . . 0 MB
SIMM Slot E . . . . . . . . . . . . . . . . . . 0 MB
SIMM Slot F . . . . . . . . . . . . . . . . . . 0 MB
SIMM Slot G . . . . . . . . . . . . . . . . . . 0 MB
SIMM Slot H . . . . . . . . . . . . . . . . . . 0 MB
PAGE 2 of 4
CURRENT HARDWARE CONFIGURATION
VIDEO ADAPTER . . . . . . . . . . Gt1
MICROCHANNEL SLOT #1 CONTENTS:
Adapter Type . . . . . . . . . . UNKNOWN
Adapter Information . . . . . . . FFE1
MICROCHANNEL SLOT #2 CONTENTS:
Adapter Type . . . . . . . . . . NONE
Adapter Information . . . . . . . FFFF
PAGE 3 of 4
CURRENT HARDWARE CONFIGURATION
OPTIONAL FEATURES
SCSI DEVICES DETECTED
LOCATION TYPE OF DEVICE
00-00-00-00 Unknown SCSI disk
00-00-00-60 Unknown SCSI CD-ROM
PAGE 4 of 4