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On the front of the unit there two dials underneath the PC-speaker to adjust the brightness of the screen and the volume of the PC-speaker. The PC-speaker in the Compaq Portable 486 is unique in that there is a 3.5 mm audio input jack on the side of the unit to allow a third party ISA sound card to pass through its audio output to the PC ...
The HandBook 486 was produced between 1993 and 1995. [4] [5] [6] The HandBook 486 had 4 MB of built-in RAM, which can be expanded to 20 MB. As of 2005, it is still possible to buy memory for the HandBook 486, although one should test the memory with memtest since memory for older computers is more likely to be defective.
An Intel DX2-66 MHz OverDrive An Intel i486SX2-50 MHz OverDrive processor installed next to the original i486SX processor. Intel 's i486 OverDrive processors are a category of various Intel 80486s that were produced with the designated purpose of being used to upgrade personal computers .
The i486DX2-66 was a very popular processor for video games enthusiasts in the early to mid-90s. Often coupled with 4 to 8 MB of RAM and a VLB video card, this CPU was capable of playing virtually every game title available for years after its release, right up to the end of the MS-DOS game era, making it a "sweet spot" in terms of CPU ...
It used the Pentium processor clocked at 100, 133 or 166 MHz. It had 4 ISA and 3 PCI expansion slots and four (2 external 5.25 inch, 1 external and 1 internal 3.5 inch) drive bays. It had 4 SIMM-72 RAM slots, and featured an IBM SurePath BIOS. The submodels were: PC 300 Series Model 340 (Model 6560-1xx) PC 300 Series Model 340 (Model 6560-4xx)
Processors range from the 386SLC-25, 486SX-25, 486DX-33, and 486DX2-66 to the Pentium 60. IBM PS/ValuePoints were shipped in the following form factors: [1] Space saving desktop introductory: IBM 6381 model #: /Si (3 expansion card slots & 3 drive bays) Space saving desktop: IBM 6382 model #: /S (3 expansion card slots & 3 drive bays)
Intel's DX4 chips initially had twice the cache of the AMD chips, giving them a slight performance edge, but AMD's DX4-100 usually cost less than Intel's DX2-66. The enhanced Am486 series supported new features like extended power-saving modes and an 8 KiB Write-Back L1-Cache , later versions even got an upgrade to 16 KiB Write-Back L1-Cache.
It was discontinued in 2000. [3] [4] Desktops ... i486 CPU (SX/33, DX/33, DX2/66), integrated Ethernet and SCSI [5 ... This page was last edited on 3 October 2024, ...