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1. 3DF Color graphics adapter 3F0 3F7 Floppy disk controller 3F8 3FF Primary serial port COM 1 PC I O Port Mapping 17 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Appendix B Summary of Interrupt Levels Interrupt Level Usage NMI Parity AT Channel Check IRQO Interval Timer 1 Counter 0 Out IRQ1 Keyboard Controller IRQ2 Reserved XT Cascade Interrupts from IRQ8 to IRQ 15 AT IRQ3 Serial Port 2 IRQ4 Serial Port 1 IRQ5 Hard Disk XT Parallel Port 2 AT IRQ6 Floppy Disk IRQ7 Parallel Port 1 IRQ8 Real Time Clock AT IRQS Re directed to IRQ2 AT IRQ10 Unassigned IRQ11 Unassigned IRQ 12 Unassigned IRQ 13 Coprocessor Error IRQ14 Hard Disk IRQ15 Unassigned 18 Summary of Interrupt Levels AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Appendix C Block Diagram RQ IRQ7 CKT A1 a DOD7 D7 1st 8536 DECODE CKT 2nd 8536 Z U oo DOAOMZZOON B M P C B U S Z Uu oo DOAOMZZOO Block Diagram 19 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Appendix D Technical Reference Digital Input and Output Digital signals are used for detecting logical status or controlling devices TTL level signals are usually developed by most DAS systems Some application are given as follows B TTL or LSTTL Level I O C
2. labeled CN1 and CN2 First Z8536 chip is brought to CN2 accessible from the rear panel of the PC while second Z8536 is brought to CN1 The connectors provides easy and direct cabling connections between the AX5240 and AXIOMTEK s accessory boards such as AX754 AX755 and AX756 The CN1 and CN2 pin assignments and description are given as follows 10 Board Configuration and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual CN1 PCO ilo off 2 OPT1 PC1 3 lo off 4 OPT2 PC2 5o o 6 GND PC3 7 lo off 8 GND 5 MHz 9 o off10 GND 2 5 MHz 11o off 12 GND INT OUT 13o o 14 GND XINT 15 o off 16 GND PBO Q1i7 o of 18 GND PB1 19 o o 20 GND PB2 21 0 o 22 GND PB3 23 0 o GND PB4 2 o o l26 GND PB5 27 o ol 28 GND PB6 29 o o 30 GND PB7 31 o o 32 GND PAO 33i o o 1134 GND PA1 35 o o 136 GND PA2 37 o oO f 38 GND PA3 39110 o 140 GND PA4 41 o ol 42 GND PA5 43 o o 144 GND PA6 45 o o 146 GND PA7 47 o 0 1 48 GND 5V 49 o o 150 GND CN1 connector pin assignments Pin Name Description PCO PC3 Second Z8536 s Port C four digital I O lines 5MHz When J P6 jumper is installed this pin is connected to 5MHz clock output 2 5MHz When J P5 jumper is installed this pin is connected to 2 5MHz clock output INTOUT When J PA jumper is installed this pin is connected to second Z8536 interrupt output EX INT This is the extemal interrupt input pin PBO PB7 Second Z8536 s
3. Connect the 2 5MHz clock output to pin 11 of CN1 connector JP6 Connect the 5MHz clock output to pin 9 of CN1 connector In factory all JP3 through JP6 jumpers are left open 6 Board Configuration and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual JP8 through JP11 jumpers are used to set external interrupt enable signal first Z8536 interrupt output 2 5MHz and 5MHz clock output for CN2 connector The JP8 through JP11 jumper configurations are listed in the following table Jumper Configuration Connect the extemal interrupt enable signal at pin 15 of CN2 connector to intemal interrupt ckt If extemal interrupt source is selected refer to Interrupt Source Selection section this JP8 jumper must be connected Connect first 28536 interrupt output to pin 13 of CN2 connector Connect the 2 5MHz clock output to pin 11 of CN2 connector Connect the 5MHz clock output to pin 9 of CN2 connector In factory all JP8 through JP11 jumpers are left open Independent Chained Interrupt Selection Interrupts for the two Z8536s may be independent or chained together by setting JP7 jumper Each Z8536 may be programmed to accept 16 independent external interrupt lines in high low rising or falling edge and output an interrupt to PC interrupt service routine Or the 16 interrupt lines may be chained together as a set of 32 external interrupt lines by connecting pins 2 a
4. Port B eight digital I O lines PAO PA7 Second Z8536 s Port A eight digital I O lines 45V 5VDC PC power OPT1 OPT2 By setting JP1 jumper refer to 12V or Ground Selection section these pins can be connected to 12V PC poweror Ground GND Ground Board Configuration and Installation 11 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual CN2 PCO ilo o OPT1 PC1 3lo o OPT2 PC2 5o o GND PC3 7 o o GND 5 MHz 9 lo o GND 5 MHz 11 o0o o GND INT OUT 13o o GND EX INTE 15 o o GND PBO 17 o o GND PB1 19o o GND PB2 a1l lo o GND PB3 23 o o GND PB4 o o GND PB5 27 o o GND PB6 29 o o GND PB7 31l o o GND PAO 3a3 o o GND PA1 35 o o GND PA2 37 o o GND PA3 39 o o GND PA4 41 o o GND PA5 43 o o GND PA6 45 o o GND PA7 47 o o GND 45V 49 o o GND CN2 connector pin assignments Pin Name Description PCO PC3 First Z8536 s Port C four digital I O lines 5MHz When JP11 jumper is installed this pin is connected to 5MHz clock output 2 5MHz When JP10 jumper is installed this pin is connected to 2 5MHz clock output INTOUT When J P9 jumper is installed this pin is connected to first 28536 interrupt output EX INTE This is the extemal interrupt enable pin PBO PB7 First Z8536 s Port B eight digital I O lines PAO PA7 First Z8536 s Port A eight digital I O lines 45V 5VDC PC power OPT1 OPT2 By setting JP2 jumper refer to 12V or Ground Selection section these pins
5. appropriate base address switch the individual switches into the ON or OFF position The following figure shows SW1 default setting 300 Hex where switches 1 and 2 are moved to the OFF position while leaving all other switches in the ON position A table for the switch configuration is given in the following page B Base Address Switch Setting SW1 9 8 7 6 5 4 3 X o 1 2 3 4 5 6 7 8 N ON 0 WEIGHTING 8 Dec 008 Hex 16 Dec 010 Hex 32 Dec 020 Hex 64 Dec 040 Hex 128 Dec 080 Hex 256 Dec 100 Hex 512 Dec 200 Hex Each switch represents one address weight The desired base address is determined by adding the weight of the switches flipped at OFF position The base address calculation is as follows Base Address 512 256 768 Dec 300 Hex 4 Board Configuration and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual DIP Switch Position I O Port Range Hexadecimal 207 20F 217 21F 227 307 3F7 3FF NOTE 0 ON 1 0FF X Don t care Factory default setting 12V or Ground Selection Pins 2 and 4 at CN1 and CN2 50 pin connectors can be connected to 12V PC power or Ground by setting JP1 and JP2 jumpers respectively When the 12V is jumpered to the CN1 or CN2 connector you may use the AX5240 for direct relay driving or input pull high voltage The JP1 and JP2 jumper settings are listed in below table Si
6. AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Disclaimers The information in this manual has been carefully checked and is believed to be accurate AXIOMTEK Co Ltd assumes no responsibility for any infringements of patents or other rights of third parties which may result from its use AXIOMTEK assumes no responsibility for any inaccuracies that may be contained in this document AXIOMTEK makes no commitment to update or to keep current the information contained in this manual AXIOMTEK reserves the right to make improvements to this document and or product at any time and without notice No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of AXIOMTEK Co Ltd Copyright 1997 by AXIOMTEK Co Ltd All rights reserved December 1997 Ver A2 Printed in Taiwan Trademarks Acknowledgments AXIOMTEK is a trademark of AXIOMTEK Co Ltd IBM is a registered trademark of International Business Machines Corporation MS DOS Microsoft C and QuickBasic are trademarks of Microsoft Corporation TURBO C is a trademark of Borland Inc BASIC is a trademark of Dartmouth College Intel is a trademark of Intel Corporation Other brand names and trademarks are the properties and registered brands of their respective owners ES
7. Connect PC Ground to pins 2 and 4 of JP1 CN1 connector This is also J P1 factory default setting V_G Connect 12VDC PC power to pins 2 V_G Connect PC Ground to pins 2 and 4 of JP2 mum CN2 connector This is also J P2 factory default setting Connect 12VDC PC power to pins 2 JP2 mm and 4 of CN2 connector Board Configuration and Installation 5 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual NOTE Through the corresponding connector the AX5240 is compatible with AX1416 and AX1424 solid state module panels from AXIOMTEK Through the corresponding connector the AX5240 is compatible with AX754 AX755 and AX756 accessory boards from AXIO MTEK When the AX5240 is used with standard Opto 22 interface panel board pins 2 and 3 of JP1 JP2 must be connected External Interrupt Enable Clock and Interrupt Output Setting JP3 through JP6 jumpers are used to set external interrupt input second Z8536 interrupt output 2 5MHz and 5MHz clock output for CN1 connector The JP3 through JP6 jumper configurations are listed in the following table Jumper Configuration Connect the external interrupt input signal at pin 15 of CN1 connector to intemal interrupt ckt If extemal interrupt source is selected refer to Interrupt Source Selection section this J P3 jumper must be connected Connect second 28536 interrupt output to pin 13 of CN1 connector
8. D Precautions Integrated circuits on computer boards are sensitive to static electricity To avoid damaging chips from electrostatic discharge observe the following precautions Do not remove boards or integrated circuits from their anti static packaging until you are ready to install them Before handling a board or integrated circuit touch an unpainted portion of the system unit chassis for a few seconds This helps to discharge any static electricity on your body Wear a wrist grounding strap available from most electronic component stores when handling boards and components Unpacking The AX5240 is packed in an anti static bag This board has components that are easily damaged by static electricity Do not remove the anti static wrapping until proper precautions have been taken Safety instructions in front of this User s Manual describe anti static precautions and procedures Inventory and Inspection After unpacking the board place it on a raised surface and carefully inspect the board for any damage that might have occurred during shipment Ground the board and exercise extreme care to prevent damage to the board from static electricity Integrated circuits will sometimes come out of their sockets during shipment Examine all integrated circuits particularly the BIOS processor and keyboard controller chip to ensure that they are firmly seated The AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board pac
9. can be connected to 12V PC power or Ground GND Ground 12 Board Configuration and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Pull High Down Resistors On the AX5240 board there are reserved spaces for installing pull high down resistors resistor packs Below table lists the DI O lines and their corresponding resistor packs DI O Lines Resistor Rack First Z8536 PAO PA7 PBO PB7 PCO PC3 Second Z8536 PAO PA7 PBO PB7 PCO PC3 When using interrupt the resistor packs have to be installed to avoid unstable floating signals The resistor values are suggested to be within 4 7KQ 10KQ and pull high The positions of resistor pack RP1 RP6 are shown on location diagram The pin definitions are illustrated as follows 1 2 3 4 5 6 7 8 9 10 ETE E Bit O Bit 7 T PC VCC PC Ground The RP1 RP6 are all the same as above figure Board Configuration and Installation 13 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Board Installation The AX5240 board is shipped with protective electrostatic cover When unpacking touch the board electrostatically shielded packaging with the metal frame of your computer to discharge the accumulated static electricity prior to touching the board The following description summarizes the procedures for installing AX5240 WARNING TURN OFF the PC and all accessories connecte
10. d to the PC whenever installing or removing any peripheral board including the AX5240 series board Installation Procedure 1 Turn off the PC and all accessories power 2 Unplug all power cords and entire cables from PC s rear panel 3 Remove the PC s cover see your PC operation Guide if you are not skillful about it 4 Find an unused expansion slot Remove the blank expansion slot cover and save the screw for affixing retaining bracket 5 Grab the upper edge of the AX5240 board Align the AX5240 board s retaining bracket with the expansion slot rear panel and straighten the board s gold finger with the expansion slot crush the board into the slot 6 Restore the screw to the expansion slot retaining bracket Replace the PC s cover and connect the cables you detached in step 2 8 Turn on the PC and other peripheral devices power N 14 Board Configuration and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Chapter 3 Register Format and Description The AX5240 occupies 8 consecutive addresses of PC I O address space The first address or base address is determined during installation by setting onboard DIP switch labeled SW1 The base address 0 through 3 access first Z8536 s three data and one control registers The base address 4 through 7 access second Z8536 s three data and one control registers This chapter lists each AX5240 register in terms of address a
11. interrupt only 4 channels of relay can be used B AX756 24 channel electromechanical single pole double throw SPDT which can be driven by the AX5240 Shipped with 3 3 feet 1 meter cable and 50 pin connector If used only 20 channels are available 2 Introduction AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Chapter 2 Board Configuration and Installation Component Locator Diagram The following figure shows the component location of AX5240 All switch and jumper settings in this figure are the factory default settings Re V_G SECOND Z8536 JP E 1 U 3 a RP T FIRST Z8536 U 4 Rsm JP3 Gl JP6 UR JP9 HABE Al very e Trpo JP10 X3210 s wA X765432 Board Configuration and Installation 3 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Base Address Switch The AX5240 board occupies 8 consecutive locations in I O address space The first address or base address is selected via a 8 position DIP switch labeled SW1 If more than one boards are to be installed to one PC each board must be given its own distinct I O address or base address No more than one board may use the same base address When you are selecting the base address it would be better if you check with Appendix A to avoid conflicting with other installed devices In factory the AX5240 base address is set for 300 Hex or 768 Dec To set to
12. kage includes the following B AX5240 Board B AS59099 DAC Driver CD B AX5240 Technical Manual B AX5240 User s Manual B Warranty Card Make sure that all of the items listed above are present What To Do If There Is A Problem If there are damaged or missing parts contact your supplier and or dealer immediately Do not attempt to apply power to the board if there is damage to any of its components Table of Contents Chapter bDurodssloBouoiutd idi i ded eui M MEM ELE E sissies 1 General Descriptio NET E E Pep 1 Feature MR P m n 1 Specificatii ONS a RA A ARARA A aaa 2 POSS OCS Gd Oeri eer E E E I E E 8 2 Chapter2 Board Configuration and Installation 3 Component Locator Diara sssrini einen eo E EE EN ONENE EEN 3 Base Address SW CU un didis 6D rias eite la NH saeson a bena Hu Rast ta Sls Dad N DREE E 1 2V or Grond SODSDUTOD oet iiti tri E nana Lan d pi d dapte dd ta RR A Duo ES 5 External Interrupt Enable Clock and Interrupt Output Setting sei ccccssescocdsssteascasscssuccdsosscnesicsendaaeiosenad 6 Independent Chained Interrupt SelSCHOM isis scisecastsareeessaaacderssaunrestaaanioaisaurensasnarecadaaannnaseaiediasaedoasaswees 7 Interrupt Source SENSO MON ananena a 8 Interrupt Level Sela HOD os edu ado dup s RE e a a a yr erreur er 9 Connector Pm Assis NMeNt eserinin n eae I E RA EEE EENT RE AO RM aU PA LUND MU 10 Pull Wii ISIS sia cs sets scansontsauessasadedesseasanss
13. nd 3 of JP7 jumper Jumper Configuration Interrupts for the two Z8536s are independent that is each 278536 accepts 16 independent external interrupt lines JP7 JP7 Interrupts are chained from first to second Z8536 as a set of 32 external interrupt lines This is also JP7 factory default setting Board Configuration and Installation 7 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Interrupt Source Selection By configuring JP12 jumper you may have several choices of interrupt source for your PC The following table lists all the possibly configurations of JP12 Jumper Configuration X3210 Select interrupt source from both JP12 78536 chips When first and second 28536 chips are chained JP12 must be jumpered in position O A3210 JP12 Select interrupt output from first 28536 chip X3210 JP12 Select interrupt output from second 78536 chip X3210 JP12 Select external interrupt source X3210 E JP12 Disable interrupt This is JP12 factory default setting NOTE When extemal interrupt source is selected e J P3 and J P8 must be installed e The extemal intemupt sgnal routed to the PC bus is determined by EX INT pin at CN1 and EX INTE pin at CN2 EX INTE EX INT Description 0 0 1 An interrupt generated 0 150 No interrupt generated 1 X External Interrupt disable 1 X External Interrupt disable X don tcare 8 Board Configurati
14. nd function Each register is easy to read and write to by using direct I O instructions of whatever application languages To write a control word or data to the 8 bit wide register the individual bits must be set to 0 or 1 then combined to form a byte An 8 bit data is read from the register and the individual bits are analyzed to determine which bits are O or 1 AX5240 I O Address Map The registers and their functions are listed in the following table R Read W Write Base Base address Address Function Type First 78536 Base 0 Port C digital input output R W Base 1 Port B digital input output R W Base 2 Port A digital input output R W Base 3 Control and status register R W Second 78536 Base 4 Port C digital input output R W Base 45 Port B digital input output R W Base 6 Port A digital input output R W Base 7 Control and status register R W More detailed information can be found in Zilog Z8536 manual Register Format and Description 15 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Chapter 4 Programming The diskette supplied contains many demo programs in different kinds of programming language listed in the following description The main spirit of AX5240 lies on the programming of Z8536 which is given in more detailed at the technical manual of Z8536 B Microsoft Quick Basic USERVENT ASM Assembly part of ONUEVENT BAS Its major task is to do interrupt
15. non inverting input and output Rising or falling edge or high or low level trigger sense Two wire or three wire handshaking digital interface Programming examples included Introduction 1 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Specifications B Digital 1 O 28536 Output High 2 4V min 9 250uA 28536 Output Low 0 5V max 3 2mA 28536 Input High 2 0V min 7 3V max 28536 Input Low 0 3V min 0 8V max 28536 Drive Capability 5 LSTTL loads B Interrupt Input Type Positive edge triggered PC Bus IRQ IRQ 2 3 4 5 6 7 Enable Interrupt TTL O External Interrupt TTL positive trigger B Power Requirement 5VDC 440mA typ 720mA max B Physical Environment Dimensions 98mm X 104mm Weight 110g Operating Temperature Range OEC to 55EC Storage Temperature Range 20EC to 70EC Relative Humidity O to 9096 non condensing Oo O O O O Oo O O O O Accessories Guide B AX754 24 channel opto isolated D I panel for signal connection and conditioning with the AX5240 Shipped with 3 3 feet 1 meter cable and 50 pin connector If used only 20 channels are available and if using interrupt ability only 16 channels are permitted B AX755 8 channel electromechanical single pole double throw SPDT and 16 channel opto isolated digital I P panel Shipped with 3 3 feet 1 meter cable and 50 pin connector If used only 16 channels are available and permitted to
16. on and Installation AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Interrupt Level Selection The AX5240 provides interrupt handling capability for various applications The signal from interrupt source can be led to any of the six PC interrupt request lines IRQ level 2 7 by setting JP13 jumper Refer to the following table and properly set JP13 if the AX5240 board uses interrupt Jumper Configuration Select IRQ 2 X765432 Select IRQ 3 X765432 Select IRQ 4 X765432 Select IRQ 5 X765432 Select IRQ 6 X765432 Select IRQ 7 X765432 JP13 If no interrupt is used jumper the J P13 in position X This is also J P13 X765432 factory default setting NOTE It cannot be stated often enough to those unfamiliar with the 28536 WHENEVER THE Z8536 IS POWERED ON OR RESET ALL PINS ARE SET TO HIGH IMPEDANCE INPUT Board Configuration and Installation 9 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual The implications of this fact is that if you have output devices such as solid state relays they may be switched on whenever the computer is powered on or reset To prevent unwanted switching and to drive all outputs to a known state after power on or reset pull all pins either high or low through a 10K ohm resistor Connector Pin Assignment All AX5240 s input and output signals are built in two standard 50 pin male mating connectors
17. onnections TTL Level I O Connection TTL Devices Connection with CMOS Device Use a pull up resistor if you wish to interface to CMOS devices This will raise the logic high output level from its minimum TTL level of 2 4V to 5V suitable for CMOS interface VCC PULL UP RESISTOR CMOS 20 Technical Reference AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Digital Input for Open Short Switch Detection A pull up resistor must be connected especially at long distance wiring to ensure logic high input level 5 Switch j B Digital Input for Large Signal Digital Output for Relay Driving The D1 diode is added to protect the IC driver against the inductive kickback from the relay coil Technical Reference 21
18. re on a byte wide basis to the three addresses for ports A B and C The digital I O ports may also be programmed as a two wire or three wire handshaking interface port Up to three down counters may be set up independently or chained together internally Each has an input an output a gate and a trigger The trigger may be used externally or internally via software to load the count value from the hold register into the counter and initiate the count down Outputs may be square wave one shot or pulse at terminal count all three modes are recyclable Inputs are programmable for level or edge trigger either high low rising or falling Outputs may be inverting or non inverting Each Z8536 may be programmed to accept 16 independent external interrupts high low rising or falling edge and output an interrupt to the PC The output from the two Z8536s may be ANDed by onboard jumper so that any of 32 external events may cause a PC interrupt service routine to be executed All AX5240 s I O lines are built in a 50 pin connector To ease and guide user in application many programming examples on a diskette is included along with the AX5240 board About more detailed information for programming the Z8536 user must refer to Zilog Z8536 manual Features B Fully programmable for combinations of up to 32 vector interrupt director 40 bits of bit setable digital I O Six 16 bit counters with In Out Gate and Trigger Pattern matching Inverting or
19. service routine ONUEVENT BAS Demo how to invoke interrupt process routine B Microsoft C 6 00 DEMO_DIO C Demo how to issue digital output and digital input DEMOIINT C Demo how to detect interrupt from Port A 8 bits at CN2 connector DEMO2INT C Demo how to detect interrupt from Port A 8 bits at CN1 connector INTIGBIT C Demo how to detect interrupt from Port A and Port B at CN2 INT32A C Demo how to detect interrupt from both Port A and Port Bat CN1 and CN2 INT32B C The same as INT32A C but in different structure B BASIC Language DIGITIN BAS Demo how to read digital input DIGITOUT BAS Demo how to write digital output COUNTER BAS Demo how to program the counter MATCHP BAS Demo how to detect a matched pattern B TC For Turbo C users you have to modify the MSC demo programs B Turbo Pascal Users have to migrate to Pascal programs by the same I O read and write sequence which apply to the MSC demo program 16 Programming AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Appendix A PC I O Port Mapping I O Port Address Range Function 000 1FF PC reserved 200 20F Game controller J oystic k 278 27F Second parallel printer port LPT2 2E1 GPIB controller 2F8 2FF Second serial port COM2 320 32F Fixed disk XT 378 37F Primary parallel printer port LPTI 380 38F SDLC communication port 3BO 3BF Monochrome adapter printer 3C0 3CF EGA reserved 3D0
20. ugoumasansaauesracanassusoueasumiausonitededsegealenssaaanenssuaaats 13 Board Installato oai epis de Dicit tasa bbs bl REL Git bl Cu plani aL MUA HUM AM LANA MAD AUM tA aM MaU PR pM OMM E DED R 14 Chapter3 Register Format and Description ccccccccsssssssssssccscoees 15 AX se Ty Address Map PET T PP 15 Cha pte 4 Programinio scene eet bbkivid e RAPERE EE E IEEE PUNIRI MM AE IE 16 Appendix A PC VO Port Slappid cincinnati 17 Appendix B Summary of Interrupt Levels ooococccccccccsssssssssssssssssssssssssso 18 Appendix C Block Dag BE esdnh ick A E RM UAE sinensis shennan 19 Appendix D Technical Reference c ecce eee e rennen eene eee h ehe h ssh sss s aaa 20 Digital Input EK Lr E H 20 AX5240 32 Bit DI with Interrupt 40 Bit DIO or 6 Channel Counter Timer Board User s Manual Chapter 1 Introduction General Description The AX5240 is a digital with without interrupt or timing I O board for IBM PC XT AT and compatible computers The board uses a pair of the powerful Zilog Z8536 programmable digital I O chips which make it programmable for 32 bit digital input with interrupt 40 bit digital I O or 6 channel counter timer board The Z8536 may be programmed as 20 lines of digital I O Each line may be independently set for input or output and may be inverting or non inverting Once the digital I O lines are programmed writes and reads a

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