Epson Equity 486DX2/50 PLUS Product Information Guide - Page 4

EQUITY 486DX2/50 PLUS EQUITY 486SX/25 PLUS VGA Connector Pin Assignments Phi Slgnal Pin SIgnsI 1 Red Video 4 Key 2 I Green Vrdeo 10 sync Return ! 3 1Blue Vrdeo 11 1 Reserved I '4 / Unused 5 / Ground 3 Red Return 7 Green Return 6 Blue Return ii2 Reserved 113 1Honzontal sync 14 Vertcal Sync 15 ' unused DMA Channels I Channel ,O(CTRLl) 1 (CTRL 1) :P(CTRLl) ~3 (CTRL 1) 4 (CTRL 2) t 5 (CTRL 2) ,6(CTRL2; j 7 (CTRL 2) Function Spare SDLC Floppy drsk dnve controller Spare Cascade for CTRL 1 I Soare Sp1 are 1 Spare Hardware Interrupts Im CTRLl / Functlan IRQO i Timer Output 0 IRQl / Keyboard IRCX? ! Interrupt from Controller 2 IRQ3 senal port 2 IRQ4 Send port 1 1 IRQS Parallel port 2 IRC6 Floppy drsk interrupt IRQ7 Parallel potl 1 IRQB RTC Interrupt IR09 Software redrrected to IRQ2 IRQlO 1 Reserved IRQll j Reserved IRQ12 Mouse, pomtmg dewce IRQ13 Coprocessor IRQ14 Hard dusk wntroller / IRQ15 1 Reserved l/O Port Addresses 1Addmo / Aulgned devh 1OW-OlF 1 DMA controller 1 I - - -.-..- / 020 - 021 Interrupt controller 1 I 40 - 05F / Trmerlwunter 1060-06F 1Kevboard controller 180421 1 070 - 0% RTC. NMI mask regrster 060-OQF DMA page registers, MFG port OAO - OBF Interrupt controller 2 (625QA wmpabble) OCO - ODF DMA controller 2 (6237A-5 compabble) I OF0 Clear math coprocessor busy I/O Port Addresses (continued) :*ddress Aeslgnsd device 1OF1 : Reset math coprocessor 1OF8 - OFF Math coorocessor i 170- 176 1Hard dtsk controller secondary 160-185 i Contlguratlon regtsters 1BF' / Conlrguratron register unlock port 1 lFO-ln I Hard disk controller pnmary 200 - 207 1 Game I/O 278 - 27F ~Printer port 2 (278 and 27F are unused) 1278 i Confrguratron regtster unlock port 2F6 - 2FF 1 Serial port 2 ,300.31F Prototype card / 370 - 377 Floppy drsk dnve controller secondary I ! 378 - 37F Parallel printer port 1 (378 and 37F are unused) 370 i ConfIguratIon register unlock porl2 360-38F 1SDLC. btsvnchronous wmmumcatron 2 3A0 - 3AF 1 Blsynchronous wmmumcatron 1 1 I 380 - 3BF 1Monochrome dtsplay and pnnter adapter 3D0 - 3DF 1 Color/graphtcs monltor adapter 3F0 - 3R / Floppy disk drive wntroller pnmary / 3F8 - 3FF 1 Senal port 1 * These I/O address ports are wnllguratlon registers. Jumper Settings The illustration below shows the locations of the jumpers on the main system board. memory board * 25 MHz system only JP7 JP8 JP9 JPlO . JPll JP12 JP13 JP14 JP15 Miscellaneous jumper settings Jumper number JP4 JP5 JP6 JP7 Jumper ! ssttlng ~ ; 1 / it A' 0 A' I 0 I JP15 j A B ' Factory settmg Functlon Enables the burii-m VGA display adapter Disables the burlt-in VGA display adapter so you can use a dtsplay adapter on an optron card as 1 your primary adapter I Enables the power-on password Drsables the power-on password Color monitor IS mstalled Monochrome monitor IS mstalled Enables the buril-m mouse wnnector Disables the built-m mouse connector so you can use a mouse or other pointing devrce connected to ) a port on an option card Enable the early input/output ready signal I Sets a normal mput/output ready slgnal Equity Series Computers 5/12/92 486DX2/50 & 486SX/25 PLUS-3