NCR Decision Mate V Hardware System Technical Manual

N C

NCR DECISION MATE V

System Technical Manual

- Hardware

CP/M-80 and CP/M-86 are registered trademarks of Digital Re search Inc. MS-DOS is a trademark of Microsoft Inc.

Document Order Numbers

Augsburg Stock No.: 017-0032261B MIRS Library, Dayton: ST-2104-35

Printed in the Federal Republic of Germany

Second Edition, July 1983

Dayton, Ohio

It is the policy of NCR Corporation to improve products as new technology, components, software, and firmware become available. NCR Corporation, therefore, reserves the right to change speci fications without prior notice.

All features, functions, and operations described herein may not be marketed by NCR in all parts of the world. In some instances, photographs are of equipment prototypes. Therefore, before using this document, consult your dealer or NCR office for information that is applicable and current.

FOREWORD

The NCR DECISION MATE V System Technical Manuals are de signed to provide both hardware and software information: they are intended for designers, system integrators, programmers, and other interested persons who require detailed information on the construction and operation of the NCR DECISION MATE V.

Problems arising from any changes that you make to the hardware or software of the NCR DECISION MATE V are your responsibility. NCR cannot assist in resolving problems that may arise when making changes to the hardware or software.

The first manual provides general information on the NCR DECISION MATE V and its various options. Information is included on how to identify the various models and kits that are available. The hardware description includes information about the I/O bus, signal levels, power requirements, and plug/pin assignments.

The other manuals provide information on the various opera ting system software used with the NCR DECISION MATE V. The software descriptions include information for using system rou tines at machine code level.

The appendices provide schematics, component locations, software listings, and other information that may be helpful to the user of these manuals.

NCR DECISION MATE V

SYSTEM TEC HNICAL MA NUALS

System Technical Manual

Hardware

System Technical Manual

CP/M®-80

System Technical Manual

MS™ -DOS

System Technical Manual

CP/M®-86

In the NCR DECISION MATE V System Technical Manual series, the chapters are arranged in numeric sequence and the appendices in alphabetic sequence:

Hardware — Chapters 1 and 2, Appendix A

CP/M-80 — Chapter 3, Appendix B

MS-DOS — Chapter 4, Appendix C

CP/M-86 — Chapter 5, Appendix D

NCR DECISION MATE V

SYSTEM TECHNICAL MANUAL

HARDWARE

SYSTEM OVERVIEW

GENERAL DESCRIPTION

SYSTEM OVERV IEW

The NCR DECISION MATE V is the first of a new generation of NCR business/professional personal computer systems. It is de signed to act as the control center for systems that fulfill a wide range of user requirements. Industry standard interfaces are used to provide the user with a wide selection of peripherals. This sys tem approach provides a powerful tool to use in business appli cations, scientific calculations, and in various technological fields.

The processor and all supporting logic, CRT screen, disk drives, power supply, and I/O bus are all integrated into a single cabinet: this provides a system that requires the minimum of space and connecting cables. The separate keyboard is connected

by a coiled cable to the processor unit.

Most of the electronics are contained on the controller board, where possible LSI components are used providing a high degree

of reliability. Included on this board are the Z80 microprocessor, DMA, flexible disk controller, keyboard controller, and 64 K bytes RAM. Also, the I/O bus, complete with seven user accessible sockets, is integrated into the controller board. Two additional sockets are available for the factory installation of some features. In this configuration the NCR DECISION MATE V uses CP/M® - 80 operating system software and any compatible 8-bit appli cation packages. A 16-bit board, with an Intel 8088 micropro cessor, can be connected to the controller board making the computer into a dual 8/16-bit system. In this configuration the system can still use CP/M-80 and 8-bit application software, or it can use either CP/M-80 or MS-DOS™ operating system software and any compatible 16-bit application packages.

The system may have either a monochrome CRT with a green display on a dark background, or a color CRT capable of dis playing eight different colors. The CRTs can display 25 lines of data, with up to 80 characters per line, or in the graphics mode, various figures, charts, and plans.

1-1

7-2

For ex ample freestandin g Winchester Disk (10MB)

Figure 1.1 System overview

SYSTEM TECHNICAL MANUAL

SYSTEM OV ER VIEW

The integrated disk drives are available in the following combi

nations:

• One 5 1/4-inch flexible disk drive

• Two 5 1/4-inch flexible disk drives

• One 5 1/4-inch flexible disk drive and one 5 1/4-inch fixed Winchester disk drive

The I/O bus is an integral part of the controller board; it in

cludes seven sockets that allow the user to connect the various peripheral adapters and options to the bus. These adapters and options all use a common style of housing, permitting flexibility in configuring the hardware. The cabinet design is such that the adapters/options are fully recessed into the rear of the cabinet when installed. The adapters/options do not require any pre paration and can be plugged directly into the bus by the user. The peripheral adapters are used to connect industry standard printers, modems, and terminals to the bus. The bus is also used for the connection of the memory expansion modules and other special purpose modules.

Different versions of a “switcher” type power supply are used

depending on the power requirements of the different models of

the NCR DECISION MATE V. The power supply also provides

logical voltages to the bus for use by the peripheral adapters and

options.

NCR DECISION NET

The NCR DECISION NET System is a local area network system, typically consisting of the following components:

» An NCR MODUS File Sharer

• An NCR OMNINET local area network

• A number of NCR DECISION MATE V personal computers (up to 63)

To connect an NCR DECISION MATE V into the NCR

DECISION NET System, a special adapter, known as a transporter, is required. This transporter (3273-K600) connects directly into an I/O bus slot at the rear of the NCR DECISION MATE V.

1-3

KIT DESCRIPTIONS

Various kits are available to enhance the capabilities or change the hardware configuration of the NCR DECISION MATE V. Many of these kits can be plugged directly into the I/O bus by the user: others require installation by a service engineer.

Integrated Fixed Disk

This kit (K012) provides for the integration of a fixed (Winchester) disk drive. The kit includes the necessary changes for the power supply. When installed, the system has one fixed disk drive

(capacity 10M bytes) and one flexible disk drive (capacity 320/ 360K bytes).

Second Integrated Flexible Disk

These kits upgrade an NCR DECISION MATE V from a system with one flexible disk drive to a system with two flexible disk drives. Kit K018 is for systems produced in the DIN color scheme, kit K019 is for systems in the Corporate Appearance Plan (CAP) color scheme.

Memory Expansion Modules

These kits (K200, 202, and 208) can be installed, by the user,

directly into slot 1 of the I/O bus. It is only possible to install

one kit into a system. The kits provide the following memory capacities:

• K200 increases memory capacity from 64K to 128 K bytes

• K202 increases memory capacity from 64K to 256Kbytes

• K208 increases memory capacity from 64K to 512Kbytes

Centronics Peripheral Adapter

This kit (K210) can be installed, by the user, directly into the I/O bus (slots 2 to 6). The kit includes a 2 metre (6.6 ft.) cable complete with plug, that allows connection to a Centronics com patible (parallel input) printer.

RS-232-C (Communications) Peripheral Adapter

This kit (K211) can be installed, by the user, directly into the I/O bus (slots 2 to 6). The kit includes a 2 metre (6.6 ft.) cable complete with plug, that allows connection to an RS-232-C com patible (serial) communications device.

1-4

SYSTEM TECHNIC AL MA NU AL

RS-232-C (Printer) Peripheral Adapter

SYSTEM O VER VIE W

This kit (K212) is similar to K211, but is used for the connection of RS-232-C compatible (serial) printers.

RS-232-C (Plotter) Peripheral Adapter

This kit (K213) is used for the connection of a compatible plotter (e.g. NCR 5403) to the NCR DECISION MATE V.

Blank Interface Adapters

These kits (K214, 217, and 218) comprise a housing, an I/O bus connector, and a blank printed circuit board. They provide the necessary hardware to help the system integrator to develop custom interfaces or adapters.

• K214 provides hardware for one adapter

• K217 provides hardware for five adapters

• K218 provides hardware for 25 adapters

Integrated Modem

This kit (K219) can be installed, by the user, directly into the I/O bus (slots 2 to 6). It is designed to support the following modems:

® Bell 103 (300 baud) ® Bell 2035 (1200 baud)

Built into the modem housing are two sockets for the connec tion of standard telephone type plugs: a cable is included for the connection of a telephone.

Diagnostic Module

This module (K220) can be installed directly into slot 7 of the I/O bus, and is intended for service engineers and other persons inter ested in diagnosing problems. The module tests the computer and provides information on failures. It also monitors the logical voltages (+5 and +12 Vdc) and indicates whether the voltages are within or outside the specified limits. For a full description, refer to the NCR DECISION MATE V Service Manual.

8/1 6-Bit Processor

Kit K231 can be installed, by the user, directly into slot 7 of the I/O bus. It converts the NCR DECISION MATE V from an 8-bit system to a dual 8/16-bit system that is capable of using either 8-bit or 16-bit operating system and application software.

1-5

Kit 230 functions similarly to K231, but is connected inter

nally to the controller board. This kit should be installed by a

field engineer; it is not suitable for installation by the user.

Tilt Mechanism

This kit (K240) provides a means of tilting the NCR DECISION MATE V by seven degrees. The user can easily install the device

by fixing a base plate to the bottom of the computer, using the

existing holes in the base of the cabinet.

NCR OMN IN ET Transporter

This kit (K600) can be installed, by the user, directly into the I/O bus (slots 2 to 6). The adapter has twice the thickness of

other adapters, therefore it requires two slot positions for installa tion. The adapter provides the interface between the NCR DE CISION MATE V and the DECISION NET System.

MODEL AND KIT ID ENTIFICATION

The configuration of the hardware is defined by the model num

ber. The standard arrangement of the model number is shown

below:

3 2 7 3 - x x

x x - x x x x

Language code

Power code

Sub model

Ma jor model

NCR class number

The model number of the NCR DECISION MATE V is shown in Figure 1.2. The optional features are shown in Figure 1.3. An asterisk indicates a planned development not released at the time of printing, but included for reference.

1-6

SYSTEM TECHNIC AL MANU AL

SYSTEM O VER VIEW

Class 3273

Major Model 01

Sub-Model 01

Power Code 60 120 V, 5 0/ 60 Hz

Language Code

NCR Class Number

8- bit Proc ./1 2" CRT Monochrome 11 8 /1 6-bit Proc./12 " CR T Monochrom e 12

8 /1 6-bit Pr oc ./12" CR T Color

One 5 1 /4 " Flex Disk Drive

Tw o 5 1/ 4" Flex Disk Drives

02

One 5 1 /4 " Flex Disk Drive and one

03

5 1/ 4" W inchester Fixe d Disk

220 V, 5 0/ 60Hz

65 70 74 230 V , 5 0/6 0Hz 75 240 V, 50 /6 0Hz

00 01 02 03 04 Portuguese 05 06 07 Du tch 08 09

42

10 0V, 5 0/6 0Hz

US English Intern ation al English UK English

Spanish

French German

Flemish

Swedish

Danish

10 11 Norwegian 12

Italian Greek

13

Yugoslavian

14

Japanese/Katakana

15 *

Taiwanese

16 * 17 * Ar abic

Iranian

18 *

19 * Hebrew 20 Finnish 25

33 40 Swiss

La tin American/S panish Canadian South African

* Not y et released bu t shown for reference purposes

Figure 1.2 M odel number description

1-7

K it Number

De scriptio n

3273-K 01 2* 32 73-K0 18 32 73-K019 32 73-K0 90 32 73-K2 00 32 73-K2 02 64 to 25 6KB memory upgrade 32 73-K2 08 32 73-K2 10 32 73-K211 32 73-K2 12 RS-232C serial l/F & printe r cable 32 73-K2 13 32 73-K2 14 Blank inte rfac e adap ter & bus c onn ector 32 73-K217 5 b lan k interface adapters bus connectors 32 73-K2 18 32 73- K219 32 73-K2 20 32 73- K230 3273-K231 32 73-K2 40 32 73-K6 00

* Not y et released b ut shown for reference purposes

Inte grated 10 MB Winchester d isk (CAP) Second flex ib le disk upgrade (D IN) Second flex ib le disk upgrade (CAP)

Inte grated 10 MB Winchester disk (DIN) 64 to 12 8K B memory upgrade

64 to 512KB memor y upgrade Centronics para llel l/ F & cable

RS-232C serial l/F & modem cable

RS-232-C serial l/F & plott er cable

25 blan k interface adapters bus connectors

Inte grated modem

Dia gnostic modu le

Dual 8/1 6-bit processor upgrade (intern al)

Dual 8/1 6-bit processor upgrade (externa l) T ilt mechanism

NCR OM NINE T transp orter

Figure 1.3 Kits

ENV IRO N MENT AL CONS IDERAT IONS

The NCR DECISION MATE V is designed to operate in a normal “office-type” environment, without the need for special heating or air conditioning. The environmental requirements are shown in Figure 1.4; operating the computer at or beyond these limits may cause errors or damage to the hardware.

Operatin g Tem perature

Temperatu re Change 10°C (50°F ) per hour

Relative Hum idity 20% to 80%

Trans it Temperature

Storage Tem perature 10°C to 50 °C (50°F to 1 2 0°F)

Figure 1.4 E nv ironme nta l requirements

1-8

10°C to 35 °C (50°F - 95° F) at 500 metres (derated 3.3° C per 1000 metres)

-4 0° C to 60° C (-40 ° F to 140 °F)

SYSTEM TECHNICAL M ANUAL

SAFETY STAND ARDS

SYSTEM OVERVIEW

The NCR DECISION MATE V is designed and built to conform to the following standards:

Product Safety

USA UL 478 UL listing mark used Canada CSA 22.2 — 15.4, CSA monogram used Europe IEC 380, Inhouse verification Germany VDE 0806, GS label granted by trade association

Radio Protection

USA FCC Docket No. 20780, Class B Germany VDE 0871, Class A certified by German Federal

Post (FTZ)

Radiation Emission

USA Public Law 90 - 602, DHEW Publication No. (FDA)

7 5 -80 0 3

Germany X-Ray Emission Regulations

It is the responsibility of those making changes to the system

to ensure that these standards are not contravened.

NCR 3282 W INCHESTER DISK DRIVES

These units are freestanding Winchester disk drives for connection to the NCR DECISION MATE V. They are intended for con

nection to systems with either one or two integrated flexible disk

drives, and cannot be connected to systems with an integrated Winchester disk drive. Each unit has a formatted capacity of

10M bytes, and up to three units may be connected to a system,

in a daisy-chain arrangement.

Three models of the NCR 3282 Winchester Disk Drive are

available:

• NCR 3282-0101 — this model includes an interface for con nection to the NCR DECISION MATE V. It is intended for the user who wishes to connect only one freestanding drive to the system. It is not possible to connect additional drives to this model.

• NCR 3282-0102 — this model includes an interface for con nection to the NCR DECISION MATE V, also a connector is included to allow the connection of an NCR 3282-0103 in a daisy-chain arrangement.

1-9

• NCR 3282-0103 — this model connects to the NCR 3282- 0102 and also has a connector permitting the connection of another NCR 3282-0103.

All models are supplied with a cabinet that includes the drive, power supply, fan, power cables, and the appropriate intercon nection cables to provide for easy assembly of the units in a daisy- chain configuration. Technical data for the NCR 3282 Winchester Disk Drive is provided in Figure 1.5.

Capacity (fo rm atted ) :

Tra ck De nsity: 345 t pi

Tra nsfe r Rate:

Access Tim e: tra ck to trac k: 3 msec.

M otor Start Tim e: 15 sec.

Encoding Me th od:

Sectoring: Soft

Host Interface: 8 b it bi-direction al bus

Figure 1.5 NCR 3 282 Technical data

10 Mbytes 612 trac ks /u nit 17 s ectors/track (one used as alternative sector) 512 bytes/sector

5M bits /se c.

average: 85 msec.

MF M

1-10

SYSTEM TECHNICAL MANUAL

HARDWARE DESCRIPTION

CONTR OLLER MODULE

HARDWARE DESCRIPTION

The controller module consists of two printed circuit boards, the controller board and the graphics controller board. Two types of graphic controller boards are used: one, with 32Kbytes of RAM for systems with a monochrome CRT, the other, with 96 Kbytes of RAM for systems with color CRT.

CON TROLL ER BOARD

The controller is a 300mm x 290mm printed circuit board and utilizes a Z80A microprocessor and auxiliary logic to drive and control a family of 8-bit common memory and peripheral modules. Figure 2.1 shows a block diagram of the controller board.

• Z80A microprocessor is operated with a 4 MHz clock.

• The LSI flexible disk controller contains the circuitry and con trol functions for interfacing one or two flexible disk drives. It is capable of supporting double density format including double sided recording. Hand shaking signals are provided which make DMA operation easy to incorporate with the aid of the DMA controller integrated circuit.

• The RAM controller provides mulitplexed addresses and ad dress strobes, as well as refresh access arbitration for the 64 Kbytes dynamic RAM contained on the controller board, and also for the memory expansion modules. (Up to a maxi mum of 256Kbytes, or 512Kbytes with the multi-layer con troller board).

• The loudspeaker is designed to produce tones for keyboard acceptance click, bell, and music demonstration. A separate circuit provides the frequencies from 110Hz to 1174.7Hz. The small audio speaker is housed on the controller board. The loudness is adjusted by a user-accessible potentiometer.

• The keyboard interface connects the ASCII encoded keyboard to the controller board by a four-wire cable carrying logic ground, frame ground, +5V, and data signal. The keyboard is

polled by the controller. When a key is pressed, the serial data is returned on the same line. For a detailed description see the keyboard description.

2-1

I/O Bus

The lower part of the controller board contains the I/O bus to gether with seven user-accessible connectors. These connectors are identified on the board as J1 through J7 (reading from left to right), and correspond to the seven slots (numbers 1 through 7) at the rear of the cabinet.

Position J1 is reserved for the connection of any one of the

memory expansion modules (K200, K202, K208).

Position J7 is reserved for the connection of either the diag

nostic module (K220), or the customer-installable 16-bit processor

module (K231).

Positions J2 through J6 are the general purpose slots for the connection of the peripheral adapter and other interfaces to the computer. These five positions are identical, and Figure 2.2 defines the type of connector, while the pin assignments are shown in Figure 2.3.

2-2

SYSTEM TECHNICAL MANUAL

HARDWARE DESCRIPTION

Con tro ller board bus connector (JZ ^1 S )

Figure 2.2 Bus connector

a

c

+5 V

RESET/ 3 IOW / 4 ME MW/ BD1 BD3 BD5 BD7 REA DY DM A

EOP / 11

IN TA CK/ 12 AUT O/ THO LD / 14 PC LK/

LG RD

BA 19

BA 17

BA1 5

BA13 B A11 21 BA 9 BA7 BA 5 BA 3 BA1

IF SE L3 / 27 IF SE L1/ DRQ1 DAC K1/ 30 W AIT /

LG RD

20

22 23 24 25 BA2 26 BAO

28 29

31 32

1 +5 V 2

+ 12 V

RESET IN /

I OR / 5 ME M R/ 6 BDO 7 BD2

8 BD4 9

BD6

10

A BTR I/

IFSEL 4/

13 D IR /

H LD A

15

CLK1

16

TRAM D/

17

BA 18

18

BA1 6

19 BA 14

BA1 2

BA 10

BA 8

BA 6

BA4

IF SE L2/

IFSELO/

DRQO

DA CK O/

I NT /

LG RD

Figure 2.3 Bus (J2-J6) pin assignments

Two additional plug/socket connections are possible on the bus. These are made on the solder side of the controller board and are designated J2A and J7A. These connectors are not considered to be user accessible, rather for factory use, or for use by field engineers and system integrators. Normally, these two connectors are used for:

• J2A — The connection of the fixed disk interface board, or a custom design board.

• J7A — The connection of the 16-bit processor board (factory option and kit K230).

2-4

SYSTEM TECHNICAL MANUAL

HARDWARE DESCRIPTION

The power requirements for the I/O bus plugs are:

• For each peripheral plug + 5V ± 5% max. Current 0.5A or

+12V ± 5% max. Current 0.1 A

• For all plugs (Jl, J2, J2A, J3, J4, J5, J6, J7 and J7A)

+ 5V + 5% max. 5.0A +12V ± 5% max. 0.6A

The DC voltage levels for the I/O bus plugs are:

• Input/Output HIGH-Voltage V[j = 2.4 to 5.5 Volts

• Input/Output LOW-Voltage Vl = -0.5 to 0.8 Volts

Timing charts are provided in Figures 2.4 to 2.8.

2 5

£

Figure 2.4 DMA cycle tim ing

DMA CYCLE CIByte from FDC — MEMORY)

SY ST EM TE CH NICA L M A NU AL H AR DW AR E DES CR IPTIO N

Figure 2.5 Me mory read tim ing

N>

•s i

do

Figure 2.6 I/O read timing

SY ST EM TE CH NICA L MAN UA L H AR DW AR E DESCRI PTION

Figure 2.7 I/O w rite tinning

to

2- 10

in Figure 2.9. The distribution of the signals is shown in Figure

The signals for the NCR DECISION MATE V I/O bus are defined

2.10.

I/O Signals

S Y S T EM T E C H N IC A L M A N U A L H A R D WA R E D E S C R IP TI O N

2-11

Pin Pin I /O

N am e N um ber

+ 5

+12

Fi gur e 2. 9 I /O signals (1 of 5)

LG R D

BD O c6

BD 1

B D2 c7

B D3

B D4 c8

B D5 a8 I/O

B D6 c9

B D7 a9

a1 c1

c2

c16 a 32 c3 2

a6

a7

_

—

-

_

—

I/ O

+ 5V Su pp ly

+ 12 V Su pp ly

Lo gic grou nd

Data -Bu s lines (8 -b it) bidirection al, a ctive hig h D river: l|_ >2m A

Bus- Driver t o p eri ph era l BU S (LS 2 45 ),

a ut om atic d ire ct ion .

S witch by IF S E L (I/O -Rea d ). N orma l ou tp ut .

D ire cti on can be ch anged by D IR / s igna l.

Typ ical IC 's in th e interfac es are 74L S 24 5 or

Port 82 5 5.

D escri pt ion D C C harac ter istics

D riv er o r Re ceiver Re  quir em en ts of each Pe ripher al

I m ax . = 0 .5 A

I m ax . = 0 .1 A

or I l > 1.6m A

by V l < 0 .4 5 V

l| -|> -0 .2 m A

Re cei ver : l[ _< -0 .2 m A

l( -l< 2 0pA

2- 12

Pin Name N um ber

BAO

Figure 2.9 I/O signals (2 o f 5)

BA 19

IOW/

IO R/

ME MW/

M EM R/ c5 0

RE SE T/

c26

a17

a4

c4

a5 0

a3 0 System Reset Outp ut, active low . Receiver: I (_<-0.4mA

I/O

0

0 l|-l> -10m A

0 I/O WRITE

0 I/O RE AD _ .. .

Bu ffered 20 -bit Address Bus Receiver: l|_< -1.2m A

Range to 1MB Normal ou tput, ac tive high Spec. Op eration

Tri-State possible with A BTR I/s igna l.

MEMOR Y WRITE Driver: l|_ >24mA

MEMOR Y READ

Description DC Characteristics

Processor c on tro l lines. active low . Tri-sta te possible

Dr iver o r Receiver Re- quirem en ts o f each Peripheral

l(- l<6 0uA

Drive r: (Only Tris tate)

I |_>24mA

Receiver: IL <- 1.2m A

l|- l<60 uA

Special Operation

(O nly l(-) >- 5m A

Trista te)

Ih < 2 0uA

SYSTEM TECHNICAL MANUAL HARDWARE DESCRIPTION

Pin Name

RESET IN/ c3 1

Figure 2.9 I/O signals (3 o f 5)

A B TRI / c10 1

REA DY D MA a10 0

DIR /

THOL D/

H LD A

PCLK/ a1 5 0

2 -1 3

Pin Nu mber

c13 1

a14

c14

I/O

1

0

RESET IN / is an active low signal, wh ich is used to general system RESET. Internal is a RC c irc uit and a S ch m itt trigger inp ut. A RESET is possible for example by a switch to G R D .

Address Bus Tri-state, active low signal.

Ready Signal fro m the mem ory contr oller

(X AC K), active high.

Direc tion of th e databus d riv er. Low signal change to inp ut.

Test Ho ld. External request to set the Z8 0 in hold state.

Ho ld Acknow led ge. A response fro m Z80 processor. The Z80 processor is in hold state, active high.

Processor-Clock: Inverse signal of th e pro cessor lock (Z80) with a freq uency o f 4 MH z.

Description

DC Cha racteristics Drive r o r Receiver Re quirem en ts of each Peripheral

Driver open collector

Sh ort pro tectio n

Driver o nly open co lle ctor l[_> 8m A

Receiver: l|_< -1mA

Driver open co llec tor

Driver open collector

Receiver: l|_ <-0.8m A

Receiver: l|_<-0.8m A

1 |_>40m A

I(-I<50uA

I L>8 m A

I [_>8m A

I h <40uA

l|- )< 40u A

2 -1 4

Pin Name

C LK 1/ c15 0 Clock o utput 1 MH z.

Pin Nu mber

I/O Description

DC Characteristics Dr iver o r Receiver Re quirem en ts of each Peripheral

I l < -0.8m A

Ih < 4 0 uA

Figure 2.9 I/O signals (4 o f 5)

TR AMD/

c16 I Test RA M-D isable. F or external ROM or RAM

ex tension. S witching w ith the system RA M. The RA M ou tp ut w ill be disabled. Used b y the Dia gno stic m odu le. The signal is active low .

I NT / c31 I INTE RR UPT. In terru pt for Z80 , active low. D rive r on ly, open

IN TA CK/ a12 0

IN TE RR UPT ACKNOW LE DG E from the Z80

Processor, active low.

Dr iver o nly, open co lle cto r l|_>8 m A

co lle cto r I (_> 8mA

Receiver: li_<-1.2 mA

I|-I< 60 uA

W AIT/ a31

DRQO c29

DRQ1

a 29 1

I W AIT/ set the Z80, 8088, and DM A co ntr oller

in Wait-State (not ready ), active lo w

1

DM A-R equest for Channel 0, active high Driv er on ly Tristate

DMA Request for C hannel 1, active high. As ynchro nou s channel request inpu ts are used by peripherals t o request DM A service.

DA CKO/ c3 0 0 DM A-Ackn owledge Channel 0, a ctive low .

DACK1 / a 30 0 DM A-A cknow led ge Channel 1, a ctive low . These

lines in dicate an active DM A channel.

Driver o nly, open co lle cto r l|_ >8 mA

I h > -2m A

I i_>2m A

Receiver: l[_<-0.5 mA

IH < 2 0uA

NCR Decision Mate V Hardware System Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual