AMD-K6-2E/400AFR AMD [Advanced Micro Devices], AMD-K6-2E/400AFR Datasheet - Page 234
![no-image](/images/no-image-200.jpg)
AMD-K6-2E/400AFR
Manufacturer Part Number
AMD-K6-2E/400AFR
Description
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AMD-K6-2E400AFR.pdf
(332 pages)
- Current page: 234 of 332
- Download datasheet (6Mb)
AMD-K6™-2E Processor Data Sheet
10.3
Registers
Exceptions
FERR# and IGNNE#
216
Floating-Point and MMX™/3DNow!™ Instruction Compatibility
The eight 64-bit MMX registers (which are also utilized by
3DNow! instructions) are mapped on the floating-point stack.
This enables backward compatibility with all existing software.
For example, the register saving event that is performed by
operating systems during task switching requires no changes to
the operating system. The same support provided in an
operating system’s interrupt 7 handler (Device Not Available)
for saving and restoring the floating-point registers also
supports saving and restoring the MMX registers.
There are no new exceptions defined for supporting the MMX
and 3DNow! instructions. All exceptions that occur while
decoding or executing an MMX or 3DNow! instruction are
handled in existing exception handlers without modification.
MMX instructions and 3DNow! instructions do not generate
f l o a t i n g -p o i n t e x c e p t i o n s . H oweve r, i f a n u n m a s ke d
floating-point exception is pending, the processor asserts
FERR# at the instruction boundary of the next floating-point
instruction, MMX instruction, 3DNow! instruction or WAIT
instruction.
The sampling of IGNNE# asserted only affects processor
o p e ra t i o n d u r i n g t h e ex e c u t i o n o f a n e r ro r -s e n s i t ive
f l oa t i n g -po i n t i n st r u c ti on , MMX i n st r u c t i on , 3D N ow !
instruction or WAIT instruction when the NE bit in CR0 is
cleared to 0.
Floating-Point and Multimedia Execution Units
Preliminary Information
22529B/0—January 2000
Chapter 10
Related parts for AMD-K6-2E/400AFR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AMD-K6](/images/no-image3.png)
Part Number:
Description:
AMD-K6 Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
![AMD-K6-IIIE+550ACR](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![K62-550MHZ W/FAN](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
AMD CPUs, K6-2 550 MHz, Includes: Cooling Fan
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
![AMD-751AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751ACAMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-751](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751AMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-X5-133SFZ](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-X5-133SFZAm5X86? Microprocessor Family
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8131BLC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
Hyper Transport PCI-X Tunnel
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8111AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
HyperTransport I/O Hub
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-640AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
System Controller
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8132BLCT](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![AMD-766AC](/images/no-image3.png)
Part Number:
Description:
Peripheral Bus Controller
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet: