AMI Mark IV Description,
Continued
●
system support function:
•
seven Direct Memory Access (DMA) channels,
channels 0-3 for 8-bit data transfer and channel 5-7 for
16-bit data transfer)
•
three programmable timers
•
system clock
●
real-time clock
●
keyboard locking
●
8 MHz I/O bus timing compatibility for AT compatible
expansion slots at 25/33 MHz
●
expansion slots
•
six 16-bit slots
•
two 8-bit slots
•
AMI Proprietary daughterboard slot for Intel
80486 and Weitek Coprocessors
●
26-bit memory addresses to access 64 MB. With 8/16-
bit memory cards, 24-bit memory addresses can access an
additional 16 MB.
●
supports eleven interrupt levels (IRQ 3 - IRQ 7, IRQ 9 -
IRQ 12, IRQ 14, and IRQ 15).
●
I/O channel check to generate NMI
●
I/O wait state generation
●
open bus structure (allowing multiple microprocessors
to share the system resources, including memory)
●
refresh of system memory from channel
microprocessors
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: ......
