[O()O I PRO-LOG

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7704

BYTE-WIDE-MEMORY CARD USER's MANUAL

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[O()O I ^PRO-LOG

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^d CORPORATION 9/81

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FOREWORD

This manual explains how to use Pro-Log's 7704 Byte-Wide Memory Card. It is structured to reflect the answers to basic questions you, the user, might ask yourself about the 7704. We welcome your suggestions on how we can improve our instructions. The 7704 is part of Pro-Log's Series 7000 STD BUS hardware. Our products are modular, and designed and built with second-sourced parts that are industry standards. They provide an industrial manager with the means of utilizing his own people to control the design, production, and maintenance of the company's products that use STD BUS hardware.

Pro-Log supports its products with thorough and complete documentation. Also, we teach courses on howto design with, and use, microprocessors and the STD BUS products.

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You may find the following Pro-Log documents useful in your work: Microprocessor User's Guide, and the

Series 7000 SrD BUS Technical Manual. If you would like a copy of these documents, please write to us on

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your company letterhead.

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^Contents

Foreword --- Figures --- Section 1 - Purpose and Main Features --- Section Z - Installation and Specifications --- Installation --- Wi r e Jump e r s - - - -. - - - - Memory Decoder --- Memory Type --- Unused Sockets --- Memex --- Segment Select ---

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^{S pee i f} i cat ions - ... - - - -. - - - ... - - - -

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Section 3 - Operation and Programming --- Introduction --- Memex --- Memex Example --- Memex Control Software Introduction --- Memex Control Software Example One--- Memex Control Software Example Two --- Memex Control Software Example Three --- Memex Control Software Example Four --- Memex Interrupt Control Software --- Segment Select ---~--- S e gme n t S e 1 e c t Con t r ⁰ 1 So f t wa r e - - - -,- - - - Section 4 - Operating Software --- Section 5 - Maintenance --- Reference Drawings --- -Return for Repair Procedures ---~---

Limited Warranty ---

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Page

ii

v 1-1 2-1 2-1 2-3 2-5 2-23 2-27 2-28 2-30 2-32 3-1 3-1 3-2 3-3 3-6 3-7 3-10 3-12 3-15 3-18 3-23 3-28 4-1 5-1 5-1 5-4

5-4

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...

/-

2-12 2-13 2-14 2-15

2~16

2-17 2-18 2-19 2-20 2-21 2-22 2-23 2-24 2-25 2-26 2-27 2-28 2-29 2-30 2-31

7704 7704 7704 7704 7704 7704 7704 7704 7704 7704 7704 7704 7704 7704 7704

Option Option Option Option Option Option Option Option Option Option Option Option Option Option Option

Figures

6a --- 7 --- 8 - - - -.- - - -.- - - -. - - - - 9 ---

10 --- 11 --- 12 --- 13 --- 6b --- 15 --- Socket Configurations --- Memory Components --- Electrical and Environmental Specifications --- Electrical Characteristics' --- Interface Specifications --- Edge Connector Pin List --- 7704, Timing for Write --- 7704, Timing for Read --- 7704, Memex Timing --- 7704, Segments Timing ---

Page 1-3 1-4 2-2 2-2 2-3 2-4 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 2-14 2-15 2-16 2-17 2-18 2-19 2-20 2-21 2-22 2-24 2-25·

2-33 2-33 2-34 2-34 2-35 2-36 2-37 2-38 iv

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Figures (continued)

2-32 7704, Segments MEMRQ --- 2-33 7704, RDx

or WRx

Timing --- 3-1 7704 Memex Example --- 3-2 7704 Memex Example --- 3-3 7704 Memex Software Example One --- 3-4

3-5 3-6 3-7- 3-8 3-9 3-10 3-11 3-12 3-13 3-14 5-1 5-Z

7704 Memex Software Example Two --- 7704 Memex Software Example Three --- 7704 Running Example Three --- 7704 Memex Software Example Four --- 7704 Running Example Four --- 7704 Memex, Interrupt Software Flow Chart --- Memex, Interrupt Software, Primary Memory --- 7704, Memex, Interrupt Software Expanded Memory -- 7704"Segment Select Example One --- 7704 Segment Select Example Two --- 7704 Segment Control Software --- Schematic, 7704 --- Assembly, 7704 ---

2-39 2-40 3-4 3-5 3-9 3-11 3-13 3-14 3-16 3-17 3-20 3-21 3-22 3-26 3-27 3-29 5-2 5-3

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:1

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SECTION 1

PURPOSE AND MAIN FEATURES The 7704 Byte-Wide Memory card is designed to be a flexible part of the memory in your system. It's eight sockets, designed for devices conforming to the JEDEC 28 pin dual inline standard pinout, allow the use of 2K, 4K, and 8K ROMs and RAMS all of one size or in combinations.

The card c~n r~spond the the STn BUS MEMEX line in one of two ways.

The memory on the card can be separated into two banks, selected by the MEMEX line. This allows up to 64K on one card. Alternately, two. cards, with up to 64K on each card, can be used in a system, and selected by the MEMEX line.

The MEMEX line can be used to implement a maximum of memory with a minimum of cards. A system using Pro-Log's 7804 Z80A processor card, and two 7704 cards, can have up to l24K of memory with no additional signal lines or cards.

It can also respond to an external Segment Select line, allowing it to participate in large scale bank select schemes. The Segment Select line can be controlled by a memory segment controller or by I/O ports. One output port can control eight 7704 cards. Also, it can be tailored to fit small scale applications. Unused sockets can be disabled, allowing the card to occupy as little as 2K bytes . of memory space which can be mapped anywhere wi thin a 64K byte

address field.

1-1

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4C)

The 7704 has 12 specific combinations of memory parts, which are jumper selectable. Some of these are designed to compliment the

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memory provided on Pro-Log processor cards.

parts can be either ROM or RAM.

Any of the memory

The address decoder is a PROM, which can be reprogrammed by the user to provide any combination desired.

Features

*

*

*

*

*

*

All one size or combinations 2X, 4X, and 8X ROMs and RAMs.

28 pin JEDEC standard sockets Responds to STD BUS MEMEX line

Responds to external Segment Select line.

Onboard flexible address decoding

Processor independent - use with 8085, Z80, 6800/09, 8088 and others.

1-2

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FIG. 1-1, 7704 BYTE-WIDE Memory Card

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FIG. 1-Z, Block Diagram. of 7704 BYTE-WIDE Memory Card.

1-4

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SECTION 2

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Installation and Specification

Installation

The 7704 operates as part of an STn BUS card rack system . . You can plug it directly into the STn BUS backplane, as shown in Fig. 2-1, or extend it from the motherboard with'a 7901 card extender. To use the 7901 card extender, plug it into any slot in the card rack, and plug the 7704 into the connector on the 7901 card. This makes the 7704 accessible for testing, etc.

The 7704 can occupy any slot in the card cage. It should be installed with the card ejector towards the top of the card rack as shown in Fig. 2-1.

If. the external Segment Select line is used, it should be attached as shown in Fig. 2-2. The connector type is a 2 pin 0.1 inch center connector. The cable should be a twisted pair, consisting of one signal line and one ground line for added noise immunity. The Pro- Log RC704 cable can be used for this purpose, and can connect the 7704 card to an I/O card such as Pro-Log's 7605 card.

2-1

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FIG. Z-1, 7704 INSTALLATION

FIG. Z-Z, 7704 SEGMENT SELECT CONNECTOR

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2-2

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WIRE JUMpERS

Some 7704 optional functions are selected by wire jumpers. When removing and replacing these jumpers, cut the jumper in half, then desolder and remove each half individually. Remaining solder should be removed, and new jumpers installed in the appropriate places. This procedure will prevent damage to circuit traces.

Most 7704 optional functions are selected by permanent 0.025 in.

square posts which can be connected by slip on, slip off connectors. Part numbers for these connectors and headers are listed in Fig. 2-3. Fig. 2-4 shows the location of these jumpers and some of the other features of the 7704.

PAR'! MANTJF AC'I"O'RD PAR'!' Nu.Ml3D

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2 PIN READER 00 8261. 02 32 00 832 6561.1-l02 4 PIN READER 00 8261. 04 32 00 852 656l.~-104

6 PIN HEADER ^{00 826l.} 06 32 00 832 656~1-106

8 P L.'T HEADER 00 8261 08 32 00 832 6561.1-108 CONNECTOR' 00 826'. 02 42 00

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FIG. 2-3 Part Numbers for 7704 Option Jumpers

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MEMORY DECODER

The eight memory sockets of the 7704 can accept any combiantion of 2K, 4K and 8K ROMs and RAMs which conform to the specifications described in the Memory Type section. The combination of memory sizes and the address range each socket occupies, is controlled by the Memory Decoder. The Memory Decoder contains 12 optional combinations, which are selected by jumper W4 1·2, 3·4, and jumpers W5, 1·2, 3-4, and 5·6. The physical locations of these jumpers can be found in Fig. 2·4. The 12 combinations, and how to select them, are shown in Fig. 2·5. Fig. 2-6 through 2-21 are 64K memory maps, which shows the address fi.eld occupied by each socket for each option.

The Memory Decoder is a PROM. If other combinations of memory types, or other address mapping is required, the PROM can be programmed with your own option. Two sections of the PROM have been left blank specifically for this purpose. The options contained in the Memory Decoder as shipped should suffice for most.applicaitons.

If other options are required, the writing of the program, and the programming of the PROM, would be the responsibility of the user.

2-5

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JUMPERS OPTION ex = JUMPER IN8TALLED)

WS I ^W4

5-1 3-4 1-2 1-2 3-4

As X X X X -

Shipped

1 - X X X -

2 X - X X -

3 - - X X -

4 X X - X -

5 - X - X -

6a X - - - ^X·

7 - - - X -

0 X X X - -

9 - X X - -

10 X - X - -

11 - - X - -

12 X X - - -

13 - X - X X··

6b X. - - - ^X··

15 - - - - -

Uses MEMEX wilh a low slale al W4.

Uses MEMEX with 8 high slale at W4.

MEMORY PARTS BY SIZE

8K 4K 2K

0 4 4

4 0 4

4 4 0

8 0 0

0 0 0

0 0 0

4 0 0

- - -

0 4 4

0 1 7

0 5 3

0 0 0

0 0 8

0 0 0

4 0 0

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TOTAL ADDRESS MEMORY PER SOCKET COMMENTS

MEMORY RANGE

0 1 2 3 4 5

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24K OOOO-DFFF 4 4 4 4 2 2 2 2 Standard as shipped from Pro-log (4K, 2K mixed).

40K 0000-9FFF 0 0 0 0 2 2 2 2 OK, 2K m~xed.

40K OOOO-BFFf 0 0 0 0 4 4 4 4 OK, 2K mixed.

64K OOOO-FFFF 0 0 0 0 0 0 0 0 All OK.

16K 4000-7FFF 2 2 2 2 2 2 2 2 AII2K.

32K OOOO-FFff 4 4 4 4 4 4 4 4 AII4K.

This option and option 6b go together. The MEMEX line Is tied

32K OOOO-Ffff 0 8 8 8

-

^{- - -} to decoder PROM input AO, so a low MEMEX state will select 6a,

and a high will select 6b .

. Not programmed. Intentionally left blank for customer's own

- - - - - - - - - ^- configuration.

24K 0000-5fFF 4 4 4 4 2 2 2 2 4K, ~K mixed; alternate standard.

Use with 7804's standard configuration: three 4K ROM and one 10K 3000-7FFF 2 2 2 2 2 2 2 4 2K RAM. Tota. memory on both cards is 32K. If all 4Ks are ROM and all 2Ks are RAM, you have 16K ROM and 16K RAM.

Use with 7000 which has o4K ROM and 2K RAM. Option does not

26K 1000-1fff

4 2 2 2 4 4 4 4 have consecutive addresses. Total memory for both cards is

2000-7FFF 32K. If allo4Ks are ROM and all 2Ks are RAM, you have 24K ROM

and 8K RAM.

32K 00OO-7FFF 4 4 4 4 4 4 4 4 AIIo4Ks. Like option 5 except occupies addresses 0000-7FFF.

16K 0OOO-3Fff 2 2 2 2 2 2 2 2 AII2Ks. Like option 4 except occupies addresses 0000-3FFF.

32K 7FFF-OOOO 4 4 4 4 4 4 4 4 Test option for Pro-Log use only.

32K OOOO-FFFF - - - - ^{0 0 8 0} Dual bank for 2764s; to work with option 6a using MEMEX high

to select.

- - - - - - - - - - Not programmed. Intentionally left blank for customer's owm

configuration.

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FIG. 2-5, MEMORY DECODER OPTIONS

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FIG. 2-9, 7704 Option 3

2-10

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