Instruction/ maintenance manual of the product 486C 321 Studios
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EPSON Endeavor 486C power button Memory ROM bay for hard disk, diskette drive, CD-ROM, tape drive, or other Video RAM option card slots Computer Specifications Shadow RAM Cache Math coprocessor Clock/.
EPSON Endeavor 486C Parallel Serial Keyboard Mouse Option slots Speaker VGA feature connector Mass Storage One standard S-bit parallel, uni- or bi- directional interface built into main system board; .
EPSON Endeavor 486C Main System Board Diagram 7/15/93 EPSON Endeavor 486C-3.
EPSON Endeavor 486C Major Subassemblies Serial Port Connectors (CN9 and CN10) Connector Pin Assignments Parallel Port Connector (CN8) Serial Port Connector Pin Assignments Keyboard Connector (CN5) and Mouse Connector (CN4) Although the keyboard and mouse connectors are physically identical, they cannot be used interchangeably.
EPSON Endeavor 486C VGA Feature Connector (CN14) System l/O Address Map VGA Feature Connector Pin Assignments *Active low logic DMA Assignments Level Assigned device DMA0 Spare (8-bit) DMA1 Spare (8-b.
EPSON Endeavor 486C System Memory Map Hard Disk Drive Jumper Settings l lf CS (cable selection) is jumpered, the drive is a master if pin-28 is grounded and a slave if pin-28 Is not grounded.
EPSON Endeavor 486C Video Memory Hard Disk Drive Types If the computer has 512KB of video memory, you can install four 256K x 4 bit, 70ns, 20-pin DRAM ZIP (Zig-zag Inline Package) chips to increase the video memory to 1MB. The following table lists compatible DRAM ZIP chips.
EPSON Endeavor 486C Installation/Support Tips Mouse and Keyboard 0 When connecting the mouse and keyboard to the computer, be careful to plug them into the proper ports. Although the ports are physically identical, they are not interchangeable, and damage may occur to the main system board if you plug the connectors into the wrong ports.
An important point after buying a device 321 Studios 486C (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 321 Studios 486C yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 321 Studios 486C - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 321 Studios 486C you will learn all the available features of the product, as well as information on its operation. The information that you get 321 Studios 486C will certainly help you make a decision on the purchase.
If you already are a holder of 321 Studios 486C, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 321 Studios 486C.
However, one of the most important roles played by the user manual is to help in solving problems with 321 Studios 486C. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 321 Studios 486C along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
