HP 30240A Installation And Service Manual page 63

Table 4-1. Selftest LEDs and Subtest Descriptions
CODE
LED
INDICATION
HEX
NO. H I
J K
L M N
*
SUBTEST
DESCRIPTION
1 0 0 0 0 0 0 1 1 Z-80
Instruction set
2 0 0 0 0 0 1 0 1
EPROM Checksum
3 0 0 0 0 0 1 1 1
Station Address PROM Checksum
4 0 0 0 0 1 0 0 1
High Byte Latch
5
0 0 0 0 1
o
1 1
Byte RAM Data Even addresses
6
0 0 0 0 1 1 0 1
Byte RAM Data Odd addresses
7 0 0 0 0 1 1 1 1
Byte RAM Address
Incrementing addresses
8
0 0
o
1 0 0 0 1
Byte RAM Address Decrementing addresses
9 0 0 0 1 0 0 1 1
Word RAM Address tests
A
0 0 0 1 0 1 0 1
Word/Byte Address Address mapping
B
0 0 0 1 0 1 1 1 Z-80
Memory reference instructions
C 0
o
0 1 1 0 0 1
MDIAG register Proper state after reset
SYSCON register
0 0 0 0 1 1 0 1 1
eTe Data test
E
0 0 0 1 1 1 0 1
eTe Mode
0
counting
F 0
o
0 1 1 1 1 1
CTC Mode
2
counting
10 0 0 1 0 0 0 0 1
CTC Mode
4
counting
11
0 0 1 0
o
0 1 1
Interrupt PAL Bit 4 set and cleared
12
o
0 1 0 0 1 0 1 Z-80
interrupt
13
o
0 1 0 0 1 1 1 2-80
NMI Non-Maskable Interrupt
14
o
0 1
o
1 0 0 1
MHSDIS DMA Handshake Disabled
Maintenance
4-5