Power-on Tests
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Test
Identifier Device Description
F MONO Base video [1-bit monochrome]
E CLK System clock [Time-of-Year clock]
D NVR Nonvolatile RAM
C DZ Serial line controller [Includes keyboard and mouse.]
B MEM Memory
A MM Memory-management unit
9 FP Floating point unit
8 IT Interval timer
7 STRG1 ST506 disk controller \ ST506/SCSI adapter
6 SCSI-A SCSI-A bus controller /
7 SCSI-A SCSI-A bus controller \ SCSI/SCSI adapter
6 SCSI-B SCSI-B bus controller /
5 SYS Interrupt controller and Ethernet ID ROM
4 8PLN Optional 8-plane graphics coprocessor
3 Reserved
2 Reserved
1 NI Ethernet network interconnect
Power-on Test Indicator Display
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F...E...D...C...B...A...9...8...7...6...5...4...3_..2_..1?..
After a (hexadecimal) digit:
_ The device is not in the system.
* The device ROM is corrupt.
? The device failed the test.
. The device passed the test.
Some popular Power-on Test problem results:
? E 0040 0000.0005 The system clock has not been set.
? D 0050 0000.0005 The system battery is low or dead.
? 7 00A0 0000.4001 No SCSI devices are on the A (of A+B) bus.
? 6 00A0 0000.4001 No SCSI devices are on the B (or A) bus.
?? 1 00C0 0011.700E Ethernet AUI port, not connected.
?? 1 00C0 0000.7004 Ethernet BNC port, not connected.
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TEST 50 Report
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In the "TEST 50" report:
? means a minor problem.
?? means a major problem.
* means the option device is installed, but its ROM code is not
executed. (Possible only for 7,6,4,3, or 2.)
Popular "TEST 50" results:
?? NI 0000.7004 Ethernet BNC port, not connected.
NI 0000.0001 Ethernet BNC port, connected properly.
?? NI 0011.700E Ethernet AUI port, not connected.
NI 0100.0001 Ethernet AUI port, connected properly.
In the SCSI bus sections, the device codes include:
FFFFFF03 Host adapter
FFFFFF05 No device
00000001 Fixed disk
05020001 RRD40 (CD-ROM)
05000001 other CD-ROM
01000001 TK50Z (TK50 tape)
000000D4 fixed disk with too-long ID string
In the ST506 (STRG-1) controller section, the items (DUA0, DUA1,
DUA2, DUA3) show the number of disk blocks (hexadecimal):
00000000 No device.
FFFFFFFF RX23 floppy, no diskette.
00000B40 RX23 floppy, 1.44MB diskette (0xB40 = 2880).
000146B8 RD32 (0x146B8 = 83640, "42MB").
00022000 RD53 (0x22000 = 139264, "71MB").
0004C437 RD54 (0x4C437 = 312375, "159MB").
DUA0 and DUA1 are RD-series (ST506, MFM) disks which apparently were
never offered in these systems. Only early versions on the adapter
board include all the parts required to use them, and even many of those
lack the corresponding 34- and 20-pin connectors. DUA3 may be reserved
for the second half of an RX50 dual floppy drive. (No information is
available on whether an RX50 would work. The firmware V1.5 does not
work with an RX33.) The (earlier) full-function ST506/SCSI board
includes three eight-pin DIP IC's and a few passive parts which are
missing on the (later) floppy-only version.
In the serial line controller section, the six items are:
Keyboard port, Video port, Communication port, Printer port,
Keyboard self-test, and Mouse self-test. Result codes:
00000001 Good.
00000000 Missing.
000012A0 Mouse self-test passed.
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To enable the extended diagnostic functions, plug a loopback
connector (DEC part 12-25083-01) into the Comm port (arrows):
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