Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    8255 INTEL MICROPROCESSOR BLOCK DIAGRAM PPI Search Results

    8255 INTEL MICROPROCESSOR BLOCK DIAGRAM PPI Result Highlights (5)

    Part ECAD Model Manufacturer Description Download Buy
    TMPM4GQF15FG Toshiba Electronic Devices & Storage Corporation Arm Cortex-M4 processor with FPU Core Based Microcontroller/32bit/P-LQFP144-2020-0.50-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMPM4GRF20FG Toshiba Electronic Devices & Storage Corporation Arm Cortex-M4 processor with FPU Core Based Microcontroller/32bit/P-LQFP176-2020-0.40-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMPM4KMFWAFG Toshiba Electronic Devices & Storage Corporation Arm Cortex-M4 processor with FPU Core Based Microcontroller/32bit/P-LQFP80-1212-0.50-003 Visit Toshiba Electronic Devices & Storage Corporation
    TMPM4MMFWAFG Toshiba Electronic Devices & Storage Corporation Arm Cortex-M4 processor with FPU Core Based Microcontroller/32bit/P-LQFP80-1212-0.50-003 Visit Toshiba Electronic Devices & Storage Corporation
    TMPM4NQF10FG Toshiba Electronic Devices & Storage Corporation Arm Cortex-M4 processor with FPU Core Based Microcontroller/32bit/P-LQFP144-2020-0.50-002 Visit Toshiba Electronic Devices & Storage Corporation

    8255 INTEL MICROPROCESSOR BLOCK DIAGRAM PPI Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    8255 program peripheral interface

    Abstract: 8255 intel microprocessor block diagram intel 8255 8255 intel microprocessor Peripheral interface 8255 pinout block diagram of 8255 with cpu Peripheral interface 8255 intel 8255a ppi block diagram intel m8255 8255 PPI Chip
    Text: M8255 Programmable Peripheral Interface January 10, 2000 Product Specification AllianceCORE Facts Virtual IP Group, Inc. 1095 E. Duane Ave., Suite 211 Sunnyvale, CA 94086 USA Phone: +1 408-733-3344 Fax: +1 408-733-9922 E-mail: sales@virtualipgroup.com URL:


    Original
    M8255 8255 program peripheral interface 8255 intel microprocessor block diagram intel 8255 8255 intel microprocessor Peripheral interface 8255 pinout block diagram of 8255 with cpu Peripheral interface 8255 intel 8255a ppi block diagram intel m8255 8255 PPI Chip PDF

    intel 8255

    Abstract: 8255 intel microprocessor block diagram 8255 PPI INTEL 8255 PPI Chip Peripheral interface 8255 ppi 8255 data sheet 8255 programmable peripheral interface M8255 datasheet 8255 PPI Control word 8255 PPI
    Text: M8255 Programmable Peripheral Interface January 10, 2000 Product Specification AllianceCORE Facts Virtual IP Group, Inc. 1095 E. Duane Ave., Suite 211 Sunnyvale, CA 94086 USA Phone: +1 408-733-3344 Fax: +1 408-733-9922 E-mail: sales@virtualipgroup.com


    Original
    M8255 intel 8255 8255 intel microprocessor block diagram 8255 PPI INTEL 8255 PPI Chip Peripheral interface 8255 ppi 8255 data sheet 8255 programmable peripheral interface datasheet 8255 PPI Control word 8255 PPI PDF

    Intel 8255

    Abstract: intel 8255 PINOUT 8255 intel microprocessor block diagram M8255
    Text: M8255 Programmable Peripheral Interface February 22, 1999 Product Specification AllianceCORE Facts Virtual IP Group, Inc. 1095 E. Duane Ave., Suite 211 Sunnyvale, CA 94086 USA Phone: +1 408-733-3344 Fax: +1 408-733-9922 E-mail: sales@virtualipgroup.com


    Original
    M8255 S40-3 V300-4 Intel 8255 intel 8255 PINOUT 8255 intel microprocessor block diagram PDF

    8255 intel microprocessor block diagram

    Abstract: intel 8255 Peripheral interface 8255 pinout Peripheral interface 8255 notes download 8255 programmable peripheral interface Peripheral interface 8255 PPI 8255 interface word control ppi 8255 data sheet block diagram of 8255 with cpu PPI 8255 interface
    Text: ac_vip_m8255.fm Page 147 Tuesday, February 24, 1998 7:39 PM M8255 Programmable Peripheral Interface January 12, 1998 Product Specification AllianceCORE Facts Virtual IP Group, Inc. Device Family CLBs Used Core Specifics Spartan 111 XC4000E 111 1 1094 E. Duane Ave., Suite 211


    Original
    m8255 XC4000E 8255 intel microprocessor block diagram intel 8255 Peripheral interface 8255 pinout Peripheral interface 8255 notes download 8255 programmable peripheral interface Peripheral interface 8255 PPI 8255 interface word control ppi 8255 data sheet block diagram of 8255 with cpu PPI 8255 interface PDF

    PPI 8255 interface with 8085

    Abstract: ppi 8255 interfacing with 8085 PPI 8255 interface with 8085 of digital to analog 8085 interfacing 8155 interfacing of 8255 devices with 8085 8155 intel microprocessor block diagram microprocessors interface 8085 to 8255 MOTOROLA 381 equivalent PPI 8255 interface data serial 8155 intel microprocessor pin diagram
    Text: 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS TC7109 TC7109 TC7109A TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive components and a crystal are required to form a complete


    Original
    12-BIT TC7109 TC7109A TC7109A 12-bit PPI 8255 interface with 8085 ppi 8255 interfacing with 8085 PPI 8255 interface with 8085 of digital to analog 8085 interfacing 8155 interfacing of 8255 devices with 8085 8155 intel microprocessor block diagram microprocessors interface 8085 to 8255 MOTOROLA 381 equivalent PPI 8255 interface data serial 8155 intel microprocessor pin diagram PDF

    PPI 8255 interface with 8085

    Abstract: 8155 intel microprocessor pin diagram microprocessors interface 8085 to 8255 ppi 8255 interfacing with 8085 interfacing of 8255 devices with 8085 8155 intel microprocessor block diagram PPI 8255 interface data serial 8155 PPI 8155 microprocessor block diagram PPI 8255 interface with 8085 of digital to analog
    Text: 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS TC7109 TC7109 TC7109A TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive components and a crystal are required to form a complete


    Original
    12-BIT TC7109 TC7109A TC7109A 12-bit PPI 8255 interface with 8085 8155 intel microprocessor pin diagram microprocessors interface 8085 to 8255 ppi 8255 interfacing with 8085 interfacing of 8255 devices with 8085 8155 intel microprocessor block diagram PPI 8255 interface data serial 8155 PPI 8155 microprocessor block diagram PPI 8255 interface with 8085 of digital to analog PDF

    PPI 8255 interface with 8085

    Abstract: ppi 8255 interfacing with 8085 comparison between 8255 with 8155 motorola mc6820 PPI 8255 interface with 8085 of digital to analog 87c48 PPI 8255 interface microprocessors interface 8085 to 8255 8255 PPI Chip PPI 8255 interface data serial
    Text: 1 TC7109 TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS 2 FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive components and a crystal are required to form a complete


    Original
    TC7109 TC7109A 12-BIT TC7109A 12-bit PPI 8255 interface with 8085 ppi 8255 interfacing with 8085 comparison between 8255 with 8155 motorola mc6820 PPI 8255 interface with 8085 of digital to analog 87c48 PPI 8255 interface microprocessors interface 8085 to 8255 8255 PPI Chip PPI 8255 interface data serial PDF

    PPI 8255 interface with 8085

    Abstract: 8155 intel microprocessor block diagram 8255 intel microprocessor block diagram microprocessor 8255 application 8085 interfacing 8155 PPI 8255 interface data serial 8155 intel microprocessor pin diagram intel 8255 CB2CE Peripheral interface 8155 notes download
    Text: TC7109 TC7109A 12-BIT µP-Compatible Analog-To-Digital Converters FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive components and a crystal are required to form a complete


    Original
    TC7109 TC7109A 12-BIT TC7109A 12-bit TC7109/A-7 DS21456A PPI 8255 interface with 8085 8155 intel microprocessor block diagram 8255 intel microprocessor block diagram microprocessor 8255 application 8085 interfacing 8155 PPI 8255 interface data serial 8155 intel microprocessor pin diagram intel 8255 CB2CE Peripheral interface 8155 notes download PDF

    intel 8288

    Abstract: intel 8288 bus controller 8085 MICROCOMPUTER SYSTEMS USERS MANUAL 8086 interrupt structure design fire alarm 8088 microprocessor RCA SK CROSS-REFERENCE 8086 family users manual 8086 user manual AP 67 weir smm 200
    Text: iAPX 86, 88 USER'S MANUAL AUGUST 1981 Intel Corporation makes no warranty for the use of its products and assumes no responsibility for any errors which may appear in this document nor does it make a commitment to update the information contained herein. Intel software products are copyrighted by and shall remain the property of Intel Corporation. Use, duplication or


    Original
    w-9707 116th SA/C-258n81 /45K/RRD intel 8288 intel 8288 bus controller 8085 MICROCOMPUTER SYSTEMS USERS MANUAL 8086 interrupt structure design fire alarm 8088 microprocessor RCA SK CROSS-REFERENCE 8086 family users manual 8086 user manual AP 67 weir smm 200 PDF

    MZ80 sensor

    Abstract: crt monitor circuit diagram intex 171 8086 microprocessor based project on weight AT89C51 opcode SL100 pin configuration interfacing Atmel 89C51 with ir sensors Block Diagram of 8279 micro processor generation of control signals in 89c51 micro keypad 4x6 matrix led interfacing with 89C51
    Text: R 1. Introduction 2. LogiCORE Products 3. AllianceCORE Products 4. LogiBLOX 5. Reference Designs Section Titles R Table of Contents Introduction Introduction Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2


    Original
    XC4000-Series XC3000, XC4000, XC5000 xapp028 xapp028v xapp028o MZ80 sensor crt monitor circuit diagram intex 171 8086 microprocessor based project on weight AT89C51 opcode SL100 pin configuration interfacing Atmel 89C51 with ir sensors Block Diagram of 8279 micro processor generation of control signals in 89c51 micro keypad 4x6 matrix led interfacing with 89C51 PDF

    LEAPER-3

    Abstract: 74189 7489 sram 4N34 89C51 interfacing with lcd display ic 74192 pin configuration interfacing 20x4 LCD with 89c51 IC 74189 DATA LEAP-U1 LEAPER-10 driver
    Text: COMPANY PROFILE 1 Leap Electronic was established in 1980 located in Taipei Taiwan. With great experienced employees, Leap has dedicated on test equipment and provided a whole and perfect environment of development. Additional, the Company has been qualified by major IC manufacturer such as ATMEL, AMD, MICROCHIP, WINBOND,etc.


    Original
    PIC16C52/54/54A PIC16C55/56/57/57A/58A PIC12C508/509 PIC16C61 PIC16C620/621/622 PIC16C71/710 PIC16C62/63/64/65 PICC16C72/73/74/74A PIC16C83/84 PIC17C42/42A/43/44 LEAPER-3 74189 7489 sram 4N34 89C51 interfacing with lcd display ic 74192 pin configuration interfacing 20x4 LCD with 89c51 IC 74189 DATA LEAP-U1 LEAPER-10 driver PDF

    tr1602

    Abstract: SJ 2252 CIRCUIT DIAGRAM MCS-6800 cdp1854 8155 PPI t 8748 8085 interfacing 8155 Peripheral interface 8155 notes IC 7109 PPI 8255 interface with 8085 of digital to analog
    Text: W Semiconductor, Inc. TC7109 TC7109A 12-B IT |liP-COMPATIBLE ANALOG-TO-DIGITAL C O N V ER TER S FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power anaiog-to-digitai converter ADC . Only eight passive com ­ ponents and a crystal are required to form a complete


    OCR Scan
    TC7109 TC7109A 12-Bit TC7109A tr1602 SJ 2252 CIRCUIT DIAGRAM MCS-6800 cdp1854 8155 PPI t 8748 8085 interfacing 8155 Peripheral interface 8155 notes IC 7109 PPI 8255 interface with 8085 of digital to analog PDF

    TDA 6172

    Abstract: ic 8255 PPI tr1602 87C46 tda 8155 ic 8155 block diagram PL II thermocouple PPI 8255 interface with 8085 of digital to analog SC771 MCS-6800
    Text: Semiconductor, Inc. TC7109 TC7109A 12-BIT iP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter (ADC . Only eight passive com­ ponents and a crystal are required to form a complete


    OCR Scan
    TC7109 TC7109A 12-BIT 12-Bit 15nVp TC7109A TDA 6172 ic 8255 PPI tr1602 87C46 tda 8155 ic 8155 block diagram PL II thermocouple PPI 8255 interface with 8085 of digital to analog SC771 MCS-6800 PDF

    comparison between 8255 with 8155

    Abstract: interface 8155 to 8255 PPI 8085 interfacing 8155 tr1602 87c48 PPI 8255 interface with 8085 of digital to analog PPI 8255 interface with 8085 TC7109CPL microprocessors interface 8085 to 8255 THERMOCOUPLE R58
    Text: WTELEDYNE COMPONENTS TC7109 TC 7109A 12-BIT pP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power anaiog-to-digital converter ADC . Only eight passive com­ ponents and a crystal are required to form a complete dual­


    OCR Scan
    TC7109 12-BIT TC7109 TC7109A comparison between 8255 with 8155 interface 8155 to 8255 PPI 8085 interfacing 8155 tr1602 87c48 PPI 8255 interface with 8085 of digital to analog PPI 8255 interface with 8085 TC7109CPL microprocessors interface 8085 to 8255 THERMOCOUPLE R58 PDF

    Untitled

    Abstract: No abstract text available
    Text: Semiconductor, Inc. TC7109 TC7109A 12-BIT jxP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive com­ ponents and a crystal are required to form a complete


    OCR Scan
    TC7109 TC7109A 12-BIT TC7109A D-82152 PDF

    Burroughs Self-Scan

    Abstract: B255A Peripheral interface 8255 with ADC Burroughs D504D 8255a PPI 8255 interface keyboard interfacing with 8255 microprocessors WM-71 PPI 8255 interface word control logic controller
    Text: intJ 8255A/8255A-5 PROGRAMMABLE PERIPHERAL INTERFACE • MCS-85TM Compatible 8255A-5 ■ 24 Programmable I/O Pins ■ Direct Bit Set/Reset Capability Easing Control Application Interface ■ Completely TTL Compatible ■ Reduces System Package Count ■ Fully Compatible with Intel


    OCR Scan
    255A/8255A-5 255A/8255A-5 Burroughs Self-Scan B255A Peripheral interface 8255 with ADC Burroughs D504D 8255a PPI 8255 interface keyboard interfacing with 8255 microprocessors WM-71 PPI 8255 interface word control logic controller PDF

    8 x 8 LED Dot Matrix 8086 assembly language code

    Abstract: 5 x 7 LED Dot Matrix 8086 assembly language code interfacing STEPPER MOTOR with 8086 microprocessor 8085 MICROCOMPUTER SYSTEMS USERS MANUAL stepper motor interface with 8086 block diagram 8086 microprocessor mini project circuit Interfacing of 16k EPROM and 8K RAM with 8085 AmSYS29 Interfacing of 32k ram and 16K EPROM with 8085 str f 6264
    Text: MULTIBUS OEM Products and Microprogrammable Development Tools E lectron ic C om ponents Instru m e n ta tion and C om puter Systems 5th Floor, Randover House, Dover Street, R andburg. South Africa. s i P.O. Box 56420. Pinegow rie 2123. South Africa. 011 789-2400 (5 lines).


    OCR Scan
    F-94588 D-3108 8 x 8 LED Dot Matrix 8086 assembly language code 5 x 7 LED Dot Matrix 8086 assembly language code interfacing STEPPER MOTOR with 8086 microprocessor 8085 MICROCOMPUTER SYSTEMS USERS MANUAL stepper motor interface with 8086 block diagram 8086 microprocessor mini project circuit Interfacing of 16k EPROM and 8K RAM with 8085 AmSYS29 Interfacing of 32k ram and 16K EPROM with 8085 str f 6264 PDF

    8155 intel microprocessor block diagram

    Abstract: nvp 1104 microprocessors interface 8085 to 8255 PPI 8255 interface with 8085 block diagram of intel 8155 chip PIA 8255 8255 PIA pin diagram 8255 PPI Chip 8155 PPI cdp1854
    Text: teluom Semiconductor, Inc. TC 7109 TC 7109A 12-BIT |lP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digitai converter ADC . Only eight passive com­ ponents and a crystal are required to form a complete


    OCR Scan
    TC7109 TC7109A 12-BIT 12-Bit TC7109X D-82152 56S29 8155 intel microprocessor block diagram nvp 1104 microprocessors interface 8085 to 8255 PPI 8255 interface with 8085 block diagram of intel 8155 chip PIA 8255 8255 PIA pin diagram 8255 PPI Chip 8155 PPI cdp1854 PDF

    cdp1854

    Abstract: 7109A 8155 intel microprocessor pin diagram tr1602 PPI 8255 interface with 8085 of digital to analog ic 8155 block diagram 8155 PPI comparison between 8255 with 8155 ic 8255 PPI HD6403
    Text: TELEDYNE COMPONENTS 3hE D flT17b02 0007210 2 » T S C " T -S l-iO -V 2 _ WTELEDYNE COMPONENTS TC7109 TC7109A 12-BIT nP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES GENERAL DESCRIPTION • The TC7109A is a 12-bit plus sign, CMOS low-power analog-to-digital converter ADC . Only eight passive com­


    OCR Scan
    flT17b02 TC7109 TC7109A 12-BIT 000723T 12-BIT TC7109A_ cdp1854 7109A 8155 intel microprocessor pin diagram tr1602 PPI 8255 interface with 8085 of digital to analog ic 8155 block diagram 8155 PPI comparison between 8255 with 8155 ic 8255 PPI HD6403 PDF

    ic 8255A

    Abstract: intel ic 8255 Peripheral interface 8255 with ADC 8255A 8255 intel microprocessor block diagram ppi PPI 8255A PPI 8255 pin configuration PPI 8255 interface ic 8255 PPI intel 8255a ppi block diagram
    Text: intJ 8255A/8255A-5 PROGRAMMABLE PERIPHERAL INTERFACE • M C S -85T M Compatible 8255A-5 ■ Direct Bit Set/Reset Capability Easing Control Application Interface ■ 24 Programmable I/O Pins ■ Completely TTL Compatible ■ Reduces System Package Count ■ Fully Compatible with Intel


    OCR Scan
    255A/8255A-5 255A/8255A-5 ic 8255A intel ic 8255 Peripheral interface 8255 with ADC 8255A 8255 intel microprocessor block diagram ppi PPI 8255A PPI 8255 pin configuration PPI 8255 interface ic 8255 PPI intel 8255a ppi block diagram PDF

    8255 intel microprocessor block diagram ppi

    Abstract: intel 8255A Peripheral interface 8255 with ADC 8255A intel IC 8255 intel 8255 8255a intel keyboard interfacing with 8255 microprocessors Control word 8255 PPI datasheet intel IC 8255
    Text: inU 8 2 5 5 A /8 2 5 5 A -5 PROGRAMMABLE PERIPHERAL INTERFACE • M C S - 8 5 TM Compatible 8255A-5 ■ 24 Programmable I/O Pins ■ Direct Bit Set/Reset Capability Easing Control Application Interface ■ Completely TTL Compatible ■ Reduces System Package Count


    OCR Scan
    255A/8255A-5 MCS-85â 825SA-5 255A/8255A-5 8255 intel microprocessor block diagram ppi intel 8255A Peripheral interface 8255 with ADC 8255A intel IC 8255 intel 8255 8255a intel keyboard interfacing with 8255 microprocessors Control word 8255 PPI datasheet intel IC 8255 PDF

    RAS 0510 SUN HOLD

    Abstract: sun hold RAS 0510 8255 PPI Chip 8086 PPI 8255 interface with 8086 82C100 F82C100 8255 programmable peripheral interface 7 SEGMENT DISPLAY 8255 and 8088 ic dma 8237 8088 LA 7840
    Text: «sì:ik uuuui»uu: ADVANC E INFORMATION C in ilP S . 82C 100 IB M T P S /2 M odel 3 0 and S u per X T 71 C o m p atib le C hip M 100% PC/XT compatible * • Build IBM PS/2 Model 30 with XT software compatibility Key superset features: EMS control, dual


    OCR Scan
    IBM11 82C100 80C86, 100-pin RAS 0510 SUN HOLD sun hold RAS 0510 8255 PPI Chip 8086 PPI 8255 interface with 8086 F82C100 8255 programmable peripheral interface 7 SEGMENT DISPLAY 8255 and 8088 ic dma 8237 8088 LA 7840 PDF

    NEC V20

    Abstract: 82c11 PPI 8255 interface with 8086 V30 CPU explain the 8288 bus controller 10G APD chip NEC 2561 8255 interface with 8086 Peripheral 82C601 intel 8284 clock generator
    Text: CHIPS p r e l i m in a r y 82C 110 IBM PS/2 MODEL 30 AND SUPER XT” COMPATIBLE CHIP m Key superset features: EMS control, dual • 100% PC/XT compatible clock, and 2.5 MB DRAM support ■ Build IBM PS/2™ Model 30 with XT softw an compatibility ■ Bus Interface compatible with 8086,80086,


    OCR Scan
    82C110 80CB6, 80C88, 100-pin 82CT10 82C110 A16-11 F82C110 PFP-100 NEC V20 82c11 PPI 8255 interface with 8086 V30 CPU explain the 8288 bus controller 10G APD chip NEC 2561 8255 interface with 8086 Peripheral 82C601 intel 8284 clock generator PDF

    la 76805 volt on pin

    Abstract: intel 8708 eprom M3002 Pulse M3001 eprom 8708 2316a rom UPP-103 interfacing 8275 crt controller with 8086 intel 1402a Pascall
    Text: Intel Corporation 3065 Bowers Avenue • Santa Clara, CA 95051 Telephone: 408 987-8080 TWX: 910-338-0026- Telex: 34-6372 inter Component Data Catalog 1978 Numerical and Functional Indexes 1 General Information 2 Random Access Memory 3 Read Only Memory 4


    OCR Scan
    MCS-4/40â MCS-48â MCS-80/85â -883B la 76805 volt on pin intel 8708 eprom M3002 Pulse M3001 eprom 8708 2316a rom UPP-103 interfacing 8275 crt controller with 8086 intel 1402a Pascall PDF