Switch Settings Computer Specifications CPU: RAM: ROM: Floppy Disk Controller: Expansion Slots: Speaker: Clock/Calendar RAM: Keyboard: Power: Video Controller and Screen: Mass storage: Interfaces: NEC V30 dual-speed m1croprocess0r. 4.77 or 10 MHz Switch selectable clock speeds. 20-b,, address bus and 16.blf data bus 640KB on man system board 16KB.,n two sockets 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 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 Centronlcs -compatible parallel port RS-232C compattble serial port 5 25 floppy disk dwe port Exlernal CGA port I The CPU SPEED switch selects between 4.77 MHz and 10 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. LCD DIP Switch Settings Switches 1 2 3 4 Num Lock Functions Environmental Conditions: Temperature Humidity: 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 Physical Dimensions: Wldlh -13 6 I Depth -12 2 I Height- 3 1 I Waghi- 12 6 Ibs (Dual floppy disk drive conhguratlon) Display Options: Supertwist Backlit LCD Screen Type: Rellectlve Transmlsslve LCD Color: YdOW Blue Size (Active Area): 95 x 4 1 95 x 41 Aspect Ratio: 14to1 14101 Graphrcs Resolution: 640 x 200 640 Y 200 Character Drsplav: S&&able View Anglellnverse Video: 80 x 25 Y=?S 60 x 25 Adjustable Brightness: NO Power Saver Feature: NO LCD Normal LCD Reverse LCD Screen Mode 0 LCD Screen Mode 1 LCD Screen Mode 2 LCD Screen Mode 3 Select LCD Select RGB color monitor J Equity LT Options: 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 EQLT - 1 12/12/88
Back Panel DIP Switch Settings Switches Functions 12 3 4 PIN NO. SIGNAL NAME DIRECTI 1 -STROBE 0 : DATA0 DATA1 ii 4 DATA2 0 5 DATA3 0 6 DATA4 i 7 DATA5 8 DATA6 0 9 DATA7 0 10 -ACK I 11 BUSY I 12 I 13 ZCT I 14 -AUTOFD I 15 -ERROR I 16-1NIT I 17 -SLCTIN I 18-25 GND Serial Port Connector DESCRIPTI 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 3N Use external diskette drive 3FF Use parallel printer O N External diskette drive is B External diskette drive is A 1 FDD 2 FDDs Serial port is secondary Serial port is primary PIN NO. SIGNAL NAME DIRECTI DESCRIPTI 1 CRDET I Data Carrier Detect RXDT I Receive Data : TXDT Transmit Data 4 DTR i Data Terminal Ready SG Signal Ground z DSR Data Set Ready RTS :, Request to send L CTS I Clear to Send 9 RI I Ring Indicator 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 Parallel Port Connector 13 000000000000cJ 25 oooooooooooc PIN NO. SIGNAL NAME DIRECTI ROUT GOUT BOUT IOUT NC HSYNC VSYNC DESCRIPTI Frame Ground Ground Video Signal (Red) Video Signal (Green) Video Signal (Blue) Video Signal (Intensity) No connection Horizontal Sync. Vertical Sync. EQLT - 2 12/12/88 Equity Series Computers
I/O Port Addresses Address Function 000-OlF DMA Controller 020-03F Interrupt Controller 040-05F Timer / Counter 080-07F Programmable Peripheral Interface 080-09F DMA Page Register OAO Non - Maskable Interrupt Mask 2F8-2FF Serial Port 2 320-32F Hard Disk Controller 3BC - 3BF Parallel Port 3D0-3DF Video (LCD/CRT) Controller 3FO-3W Floppy Disk Controller 3F8-3FF Serial Port 1 03DA Gradation Selection 1184-1185 RTC and CMOS RAM 1188 System Status Register DMA Channels Channel Function 0 DRAM Refresh 1 Spare 2 FDD Controller 3 HDD Controller Hardware Interrupts NUMBER FUNCTI IRQO IRQl IRQ2 IRQ3 IRQ4 IRQ5 IRQ8 IRQ7 Timer Output Keyboard Reserved Serial Port 2 Serial Port 1 Hard Disk Floppy Disk Printer Equity Series Computers 12/12/88 EQLT-3
lnstallation/support Tips Power - - - The Equity LT AC adapter is an auto -sensing unit which adjusts automatically between 100-240 V, 50/60 Hz. Therefore, it can be used anywhere in the world without special adjustment. - - - 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 comfortable, 3) run at 4.77 MHz and 4) turn the HDD off, at the power switch in the rear of the drive, when the HDD is not actually in use. Software Problems - - - When installing a copy- protected software package on the Equity LT, set the the CPU speed to 4.77 MHz. This has been found to have fewer conflicts with copy-protection. After the installation, the CPU can be switched back to the higher speed. - - - 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 Communications Corp.) have been found to function only at 4.77 MHz. - - - 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. 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 - E 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
Information Reference List Engineering Change Notices EQLT-001 EQLT-002 EQLT-003 12/8/87 2/10/89 Change of Cable Set Y6DE (PDD Signal Cable) Hilo-HDC Snort Potential Equity LT/LT Modem Insulating Sheet Product Support Bulletins 50031 12/14/87 w5/~ 6/14/M W89 Equity Series with Word and Serfal Printers Equity LT - Common Questions and Answers Equity LT Battery Life Equity Series Computers - ROM History Related Documentation A495AAA A806021 M-TMEQLT M-PMEQLT MPL-EQLT MPL-EQLTBL MPL-EQLTS Y16499100300 4l2li= 1 l/10/87 11/10/87 Equity LT S&ware Package. MSDOS 3.2 and GW-Basic Equity LT Software Package MSDOS 3.3 Upgrade Equity LT Technical Manual Equity LT Programmer s Reference Manual Equity LT Pans List Equity LT LCD (Back Lit) Parts List Equity LT LCD (Supertwist) Parts List Equity LT User s Guide and Diagnostics Manual 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