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Don Higgins (Public)
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Hardware and Software Timeline
Updated:2018-02-22 09:26 by
Timeline showing hardware and software I have used since 1965. The picture shows my first personal computer purchase in 1980 consisting of a Radio Shack TRS-80 Model II which I used to develop PC/370 IBM mainframe assembler, linker, and emulator that ran under CP/M operating system and could 370 assembler programs up to 32k. At USF starting in 1965 I punched cards to run FORTRAN programs on IBM 1410. At Florida Power I used IBM and NAS mainframes starting with IBM 360-30 in 1967. In 1984 I bought my first IBM PC/XT. Then in 1991 I bought by first Dell PC and have bought over 10 more since then.
Updated:2018-01-27 10:14 by
The first computer I operated and programmed myself was an IBM 360-30 at Florida Power in 1967 when I was working as a summer student. I got the IBM 360 Principles of Operations from the onsite IBM System Engineer Ivan Davia and learned the architecture and basic assembly language instructions. FPC used this computer to conotrl the IBM 1287 optical scanner for reading meter reading documents and also for tape sorts and printing. It had an IBM 2501 punched card reader and an IBM 1403 chain driven printer.
Updated:2018-01-27 10:24 by
I went to work for Florida Power full time in 1970 as a System Programmer. The first big project was installing an IBM 360-50 with 512k memory to replace an IBM 360-40, 360-30, and 360-20 using IBM operating system named MFT for Multiple Fixed Tasks. The 360-50 had 1287 scanner, 2501 card reader, two 1401 printers, tape drives and disk drives. To manage the queueing of computer jobs including bot execution and printing, I installed HASP (Houston Automatice Spooling and Printing) system utility later replaced by JES2. I also wrote a number of HASP modifications in assembler which were later submitted to the SHARE Program Library on table.
Updated:2018-01-28 06:23 by
With requirement for online customer service system, an IBM 370-158 was installed in 1973 and a CICS online system was developed in assembler for basic customer service transactions. The operating system was OS/VS2 SVS Single Virtual Storage system which was later updated to OS/MVS Multiple Virtual Storage system and is now called ZOS. An attached processor upgrade was done but the rapid growth of online applications including not only customer service but also TSO Time Sharing Option for use by staff personnel eventually overloaded the system.
Radio Shack TRS-80 Model II
Updated:2018-01-28 06:57 by
In February 1980 I bought my first personal computer from Radio Shack, a TRS-80 Model II. It had a Zilog Z80 processor chip with 4.77 MHZ clock, 64k memory, 3 - 256k floppy disk drives, and a 15 inch black and white text only monitor. The system came with TRS-DOS Radio Shack operating system which I replaced with C/PM operating system from Lifeboat along with M80 editor, assembler, and linker from a small start-up company in Washington State named Microsoft: https://books.google.com/books?id=FhASBQAAQBAJ&pg=PA108&dq=microsoft+m80+assembler+reference+manual&hl=en&sa=X&ved=0ahUKEwjwkqGWzPrYAhUH11MKHXcaBmkQ6AEIKTAA#v=onepage&q=microsoft%20m80%20assembler%20reference%20manual&f=false I spend the next several years at home in my spare time developing the predecessor to PC/370: http://scrapbookchronicles.life/?form_pic_id_option=170
Updated:2018-01-28 06:29 by
Around 1980 after a headed competition between NAS National Advanced Systems and IBM, Florida Power installed its first Hitachi Computer compatible with IBM System 370. IBM tried to override my recommendation by appealing to the President of Florida Power, Andy Hines arguing we should buy from US company. But the argument was too compelling to no go with Hitachi. Their computer would save over 1 million dollars and the NAS 5000 was faster and air cooled where as the IBM 370-168 was slower and required installation of water cooling.
Dell IBM PC compatible desktop and laptop computers
Updated:2018-02-22 09:37 by
I bought my first Dell PC in 1991 and have bought over 10 more since then. They are competitively prices and their warranty is good. They have come onsite when necessary to replace failing components under warranty, but that has only happened a few times. The PC of today is much more powerful that the first hugh mainframes I worked with at Florida Power.
Updated:2018-01-28 07:10 by
In 1984 I bought an IBM PC/XT and ported the MMS370 product written in Z80 assembler to Intel 8086 assember and used Microsoft MASM assembler for MSDOS to update it to PC/370 product. See more about PC/370 here: http://scrapbookchronicles.life/?form_pic_id_option=170 The PC/XT had Intel 8086 processor and 8087 floating point co-processor chip with 640K memory and 3.5 inch floppy disk drive.
Copyright 2017 Don Higgins Open Source under GPL V1.02 (Beta Testing)