DEC DECpc LPx User Manual

Digital DECpc LPx/LPx+ Service Procedures
MCS Logistics Engineering - Nijmegen 43
LPx+ Main Logic Board Jumper Settings
Settings shown in bold italics are factory defaults.
Feature
Description
Setting
Password clear (MFG testing)
Normal(1)
Password clear (MFG test)
J15, open
J15, jumpered
Video display type
Mono monitor
Color monitor
J14, open
J14, jumpered
CPU clock input
50 MHz
40 MHz
33 MHz
25 MHz
J1, open
J2, open
J3, open
J1, jumpered
J2, open
J3, open
J1, jumpered
J2, open
J3, jumpered
J1, open
J2, jumpered
J3, jumpered
Cache size select
0 KB
128 KB
256 KB
J4, open
J5, open
J6, open
J7, open
J4, pins 1 and 2 jumpered
J5, pins 1 and 2 jumpered
J6, pins 1 and 2 jumpered
J7, pins 1 and 2 jumpered
J4, pins 2 and 3 jumpered
J5, pins 2 and 3 jumpered
J6, pins 2 and 3 jumpered
J7, pins 2 and 3 jumpered
Factory setting
Enabled J36, jumpered
VL bus write wait state
Zero wait write
One wait write
J28, pins 1 and 2 jumpered
J28, pins 2 and 3, jumpered
CPU type
P24T,P24D
SX,DX
J35, pins 1 and 2 jumpered
J35, pins 2 and 3 jumpered
Reset switch
Enable
Disable
J24, jumpered
J24, open
RDY signal type
VLRDY->CPURDY (VL bus
ready connects to CPU bus
ready)
VLRDY->LRDY (VL bus ready
synchronized through chipset
J44, pins 1 and 2 jumpered
J44, pins 2 and 3 jumpered

DEC DECpc LPx Specifications

General

Brand	DEC
Model	DECpc LPx
Category	Desktop
Language	English