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EPSON Endeavor L
power ISA bus speed for all processors is
hard disk
diskette power
(SPEED)
8.3 MHz; local bus video speed reflects the
accesslight drive
button
light
speed of the processor; at fast speed,
DX2/50 and DX2/66 processors run
internally at 50 and 66 MHz, but run
externally at 25 and 33 MHz; local bus
speeds for DX/2 processors are 25 and
33 MHz respectively
Memory 4MB RAM standard on system board;
expandable to 36MB using 1MB, 4MB, and
16MB SIMMs; SIMMs must be 72-pin,
32-bit or 36-
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EPSON Endeavor L SVGA feature SVGA pass-through interface built into System security Password (up to 8 characters) defined in SETUP for system boot and keyboard connector main system board; 26-pin connector unlock; definable hot key combination Parallel One standard 8-bit parallel uni- or locks the keyboard and mouse bi-directional interface built into main Virus protection Write protection feature for boot sector of system board; I/O address selectable the hard disk drive through SETUP; 25-pin,
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EPSON Endeavor L Major Subassemblies option card J3 SVGA feature connector \ DIP - switches micro- - processor - CN3 P battery Jumper and DIP Switch Settings DIP switch settings Jumper settings Switch Switch 1 Jumper 1 Jumper 1 I number setting Function number setting Function 3** On CPU Installed in PGA socket J3 A* Enable the built-in VGA adapter off CPU not installed in PGA socket B Disable the built-in VGA adapter On* 4 Password enable J4** A Enable DX-based or Pentium-based
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EPSON Endeavor L System board components and connectors Use only 32-bit, 72-pin, fast-page mode SIMMs that operate at an access speed of 70ns. If 32-bit SIMMs are unavailable, you can use 36-bit SIMMs instead. Video Memory This system comes with 512KB or 1MB of video memory. You can increase the video memory to 1MB by installing a video DRAM, 40-pin, 256KB x X-bit, SOJ chip. Video resolutions and colors l Non-interlaced and interlaced ** Interlaced - External Cache EPSON Authorized Servicers can
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EPSON Endeavor L Microprocessor Upgrades The computer’s processor can be upgraded by replacing the existing microprocessor with a faster one. You can either purchase an upgrade kit from EPSON or buy the individual components separately, as listed in the following table. Microprocessor upgrade components l Actual formatted size may be slightly different than size on drive label SX2, DX/33, DX/50, DX2/50, DX2/66, DX4, and Pentium OverDrive processor upgrades require a heat sink. You may also need
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EPSON Endeavor L IDE hard disk drive Hardware Interrupts l CS (cable selection) can he jumpered for any configuration. When CS is used, the drive Is a master If pin 28 is grounded, or a slave if pin 28 Is not grounded. System Memory Map Diskette and magneto optical drive options DMA Assignments EPSON Endeavor L - 7 3/94
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EPSON Endeavor L System l/O Address Map Connector Pin Assignments Parallel port connector pin assignments (CN8) Serial port connector pin assignments (CN9, CN10) Pin Signal Pin Signal 1 Data canter detect 6 Data set ready 2 Receive data 7 Request to send 3 Transmit data 6 Clear to send 4 Data terminal ready 9 Ring Indicator 15 1 Ground I I I Keyboard connector pin assignments (CN5) Pin Signal Pin Signal 1 Data 4 Vcc 2 Reset 5 clock 3 Ground 6 NC Mouse connector pin assignments (CN4) Pin Signal
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EPSON Endeavor L assignments (CN2) Power supply connector pin assignments (CN1) Option card riser board connector pin 1; Diskette drive connector pin assignments (CN11) **All odd-numbered pins are grounds Hard disk drive connector pin assignments (CN12) *Active low logic Option slot connector pin assignments ‘Active low logic Speaker connector pin assignments (SP1) Pin Signal 1 Speaker 2 (+) Battery connector pin assignments (CN3) Pin Signal 1 RED wire (3.6v) 2 BLACK (Ground) *Active low logic 3
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EPSON Endeavor L Booting Sequence If you cannot boot the computer from the hard disk, make sure the booting sequence in SETUP is set to A: then C:. Then boot the computer from a system diskette in drive A. Password Make sure that you do not forget the password you set up. If you do: Disable the password by setting DIP switch 4 on the main system board to OFF. Then turn the computer on and off again. Set DIP switch 4 to ON to enable the password function. Run SETUP to enter a new password, if des
