Download Epson Equity LT Product Information Guide
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EQUITY LT Switch Settings Computer Specifications I The CPU SPEED switch selects between 4.77 MHz and 10 CPU: NEC V30 dual-speed m1croprocess0r. 4.77 or 10 MHz Switch selectable clock speeds. 20-b,, address bus and 16.blf data bus RAM: ROM: Floppy Disk Controller: 640KB on man system board 16KB. ,n two sockets Expansion Slots: Speaker: Clock/Calendar RAM: Keyboard: Power: Video Controller and Screen: Mass storage: Standard: Standard: Interfaces: Standard: Standard: Standard: Standard: MHz. When the computer is running at 4.77 MHz, the power light is orange, and at 10 MHz, the light is green. The CPU SPEED switch is located above the keyboard. Supports two tnfernal 35 (720KB) dwes and one external 5 25” (360KB) drive Two expansron slots (proprietary) Internal. programmable 64 Bytes of CMOS RAM lor real-llme clock. calendar, and system cont,gurat,on w,th battery backup P,op,,e,ary, full-functmn. 65 keys, separate numer~clcursor pad N,Cad rechargeable battery and siandard 1101220 AC adaptor Num Lock Superlwf or super,wsl backlit LCD, external CGA momtor port opflonal Two. 3.5 half-height floppy disk dwes. 720KB storage capacity 35- half-helgh, floppy disk dwe and 20MB hard disk drive LCD DIP Switch Settings Environmental Conditions: Temperature Humidity: Physical Dimensions: Screen Type: LCD Color: Size (Active Area): Aspect Ratio: Graphrcs Resolution: Character Drsplav: S&&able View Anglellnverse Video: Adjustable Brightness: Power Saver Feature: Equity LT Options: 1 3 4 LCD Normal LCD Reverse LCD Screen Mode 0 OFF ON ON LCD Screen Mode 1 ON OFF OFF ON OFF OFF Wldlh -13 6 I” Depth -12 2 I” Height- 3 1 I” Waghi- 12 6 Ibs (Dual floppy disk drive conhguratlon) Rellectlve YdOW 95 x 4 1 14to1 2 ON Operating Range 41~ to 90°F (50 to 35%) Storage Range -4O to 12Z°F (-20” lo 6OOC) Operating Range 20% 10 60% non-condensing storage Range 10% to 90% non-condensmg Display Options: Functions Switches Centronlcs’-compatible parallel port RS-232C compattble serial port 5 25 floppy disk dwe port Exlernal CGA port LCD Screen Mode 2 LCD Screen Mode 3 ON OFF Select LCD Select RGB color monitor Supertwist Backlit LCD Transmlsslve Blue 95’ x 41 14101 640 x 200 640 Y 200 80 x 25 60 x 25 Y=?S Yes NO Yes NO Yes Internal 30011200 baud modem 13 CGAcolordlsplay(640 x 200dots) carrying case Cigarette lighter adaptor Screen d,splays Supertwsl LCD dnsplay Supertwsl Backltt LCD display Equity Series Computers 12/12/88 EQLT - 1 J EQUITY LT PIN NO. SIGNAL NAME DIRECTION DESCRIPTION 1 Strobe Printer Data 0 Printer Data 1 Printer Data 2 Printer Data 3 Printer Data 4 Printer Data 5 Printer Data 6 Printer Data 7 Acknowledge Printer Busy Paper End Printer Select Auto Feed Printer Error Printer Initialize Printer Select Ground -STROBE DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7 -ACK BUSY : 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18-25 Back Panel DIP Switch Settings Functions Switches 12 3 4 ZCT -AUTOFD -ERROR -1NIT -SLCTIN GND 0 ii 0 0 i 0 0 I I I I I I I I Serial Port Connector Use external diskette drive 3N Use parallel printer 3FF O N External diskette drive is B OFF External diskette drive is A PIN NO. SIGNAL NAME DIRECTION O N 1 FDD 1 OFF 2 FDDs O N Serial port is secondary OFF Serial port is primary : 4 z L 9 CRDET RXDT TXDT DTR SG DSR RTS CTS RI I DESCRIPTION Data Carrier Detect Receive Data Transmit Data Data Terminal Ready Signal Ground Data Set Ready Request to send Clear to Send Ring Indicator I i :, I I Monitor Connector System Board Jumper Adjustment Jumper 5 is used to control the LED showing drive access for the left-hand drive. In position A, it supports a FDD. In position B, it supports a HDD. Connector Pin Assignments PIN NO. SIGNAL NAME DIRECTION Parallel Port Connector 13 000000000000cJ 25 oooooooooooc EQLT - 2 ROUT GOUT BOUT IOUT NC HSYNC VSYNC 12/12/88 DESCRIPTION Frame Ground Ground Video Signal (Red) Video Signal (Green) Video Signal (Blue) Video Signal (Intensity) No connection Horizontal Sync. Vertical Sync. Equity Series Computers EQUITY LT I/O Port Addresses Function Address 000-OlF 020 - 03F DMA Controller 040 -05F Timer / Counter Programmable Peripheral Interface 080 - 07F Interrupt Controller DMA Page Register 080 - 09F Non - Maskable Interrupt Mask OAO 2F8-2FF Serial Port 2 Hard Disk Controller 320 - 32F 3BC - 3BF Parallel Port 3D0 - 3DF Video (LCD/CRT) Controller Floppy Disk Controller 3FO-3W 3F8 -3FF Serial Port 1 Gradation Selection 03DA RTC and CMOS RAM 1184-1185 System Status Register 1188 DMA Channels Function Channel 0 DRAM Refresh 1 2 Spare FDD Controller 3 HDD Controller Hardware Interrupts NUMBER FUNCTION IRQO IRQl Timer Output IRQ2 IRQ3 Reserved Serial Port 2 IRQ4 Serial Port 1 IRQ5 Hard Disk IRQ8 IRQ7 Floppy Disk Keyboard Printer Equity Series Computers 12/12/88 EQLT-3 EQUITY LT lnstallation/Support Tips Software Problems Power - - - The Equity LT AC adapter is an auto -sensing unit - - - which adjusts automatically between 100-240 V, on the Equity LT, set the the CPU speed to 4.77 MHz. This has been found to have fewer conflicts 50/60 Hz. Therefore, it can be used anywhere in the world without special adjustment. - - - When installing a copy- protected software package with copy-protection. After the installation, the CPU can be switched back to the higher speed. When using the Equity LT, equipped with the HDD and backlit LCD, on battery power, take conservation measures. These are: 1) set the backlight period option to 30 seconds, 2) set the brightness and contrast controls as low as is - - - If a software package does not appear to be compatible with the Equity LT, try switching the CPU speed to 4.77 MHz before giving up. Some software packages (e.g., PC-Talk Ill from Headlands comfortable, 3) run at 4.77 MHz and 4) turn the Communications Corp.) have been found to function HDD off, at the power switch in the rear of the only at 4.77 MHz. drive, when the HDD is not actually in use. - - - Periodically, discharge the battery completely. This will help to minimize the memory effect encountered with NiCad batteries. After the complete discharge, give the LT a full, 12-hour recharge. This will help to keep battery charge life as great as possible. Video - - - When using the Equity LT with a color monitor, as opposed to an LCD, make sure that LCD DIP switch number 4 is set OFF. If the unit is connected to both LCD and monitor, the display can be switched back and forth without rebooting. - - - If you find the display, generated by your software package, is difficult to read, adjust LCD DIP switches 2 and 3 to find the clearest LCD Mode. There are four options and one of them should improve the display. - - - If your software requires that you specify a display type, select CGA. If it is an option, select CGA ONE COLOR. Some software packages have a display type called BLACK & WHITE for Laptops. If this is an available option, select it. EQLT - 4 12/12/88 Equity Series Computers EQUITY LT Information Reference List Engineering Change Notices EQLT-001 12/8/87 Hilo-HDC Snort Potential EQLT-002 EQLT-003 Change of Cable Set Y6DE (PDD Signal Cable) 2/10/89 Equity LT/LT Modem Insulating Sheet Product Support Bulletins 50031 12/14/87 Equity Series with Word and Serfal Printers w5/~ Equity LT - Common Questions and Answers 6/14/M Equity LT Battery Life W89 Equity Series Computers - ROM History Related Documentation A495AAA Equity LT S&ware Package. MSDOS 3.2 and GW-Basic A806021 Equity LT Software Package MSDOS 3.3 Upgrade M-TMEQLT Equity LT Technical Manual M-PMEQLT Equity LT Programmer’s Reference Manual MPL-EQLT 4l2li= Equity LT Pans List MPL-EQLTBL MPL-EQLTS 1l/10/87 11/10/87 Equity LT LCD (Back Lit) Parts List Equity LT LCD (Supertwist) Parts List Equity LT User’s Guide and Diagnostics Manual Y16499100300 Technical Information Bulletins EQLT-OfIl l/31 189 Equity LT/LT Modem EQSEMO4 6/12/i% Keyboard Alignment Equity Series Computers 9/22/89 EQLT-5