Step 7 Connect Cables,
Continued
Connect the Keyboard Lock Connector
J7 is a 5-pin single-inline berg. The keyboard lock allows the
user to lock the keyboard, protecting the system from
unauthorized use. This connector is keyed with a blank hole.
Pin 1 on the motherboard is labeled with a plus (+) sign.
Pin
Description
1
LED power
2
Key
3
Ground
4
Keyboard Inhibit
5
Ground
J6 Turbo LED Connector
J6 is a 2 pin single-inline berg. The Turbo LED is lit when the
processor is running at high speed. Pin 1 is Clock speed and Pin
2 is LED power.
J8 Test Connector
J8 is a 2-pin single-inline berg. This connector is used for
manufacturing testing and must remain open.
J9 Option ROM Enable
J9 is a 2 pin single-inline berg. This jumper is used to enable
option ROM. If installed, the option ROM (27512-200) is
enabled for access at E000:0000h to E000:FFFFh.
J10 AMI 80486/Coprocessor Adapter Socket
J10 is a 140-pin 4 row socket for the AMI 80486/Coprocessor
card.
Summary of Contents for Mark IV Screamer
Page 1: ...AMI AMI Mark IV Screamer Guide ...
Page 13: ...Mark IV Layout ...
Page 47: ...Warning Message A warning is displayed for Advanced CMOS Setup or Advanced Chip Set Setup ...
Page 59: ...Advanced CMOS Setup Options Continued Typematic Rate and Delay cont d ...
Page 82: ......
Page 83: ......
Page 85: ...AMI Mark IV 80486 CPU Coprocessor Card Layout ...
Page 93: ......