PCEM V.17: Intel 8088 Tutorial and Test

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[Synopsis]

In this video, I made a 8088 machine on PCEM V.17, it is a maxed out spec of a Intel 8088 to see what kind of MS-DOS programs it can run. The limitations of the 8088 chipset was the RAM, because you could have is 640 kb, which makes this machine viable for running programs from 1982 to 1989. Most programs beyond 1990 require more ram which this computer doesn't allow, and the media formats after 1990 were high density FDDs which this machine doesn't allow.

The 8088 motherboard had a math co-processor socket, which would greatly improve the FPU(float point unit) performance. The 8088 processor was great at doing integer computations, but it wasn't very good at FPU computations. FPU means real numbers, like 0.02, 0.121, 12.3141, 162.262, etc. Integer numbers are whole numbers, like 1, 2, 3, 14314141, 15252, etc. These numbers don't have decimal. If you added a math co-processor in your 8088 computer then it would become a 80188, instead of a 8088. For the 286, if you added a math co-processor then it would become a 287. Starting from the 80486 cpu, the FPU was integrated into the CPU, but before that you had an option to buy a math co-processor, and the price of these chips ranged from $400 to $1000 in the 1980s and early 1990s. In this video, I will be using a 80186, not a 8080.

The specs for the machine I use on this video doesn't represent the standard IBM XT computer of the era, because most IBM XT computers had 4.77 MHz processors with either monochrome or CGA monitors and graphics adapters. I want to try a more interesting configuration of making a deluxe 8088 machine or a super upgraded IBM XT machine. The 8088 motherboard had ISA slots, so adding a standard VGA, and a Adlib sound card was possible. Not many IBM XT machines of the late 1980s had such specs, most people got 286, and 386 based computers instead. VGA for example was released in 1987, and Adlib was also released in the same year.

There were many upgrades for the IBM XT, like hard cards which enabled you to add 10 to 30 MB hard drives. It was possible to add a ISA CGA, EGA, VGA, IBM Professional Graphics Controller, and a IBM Display Adapter if you wanted to upgrade the video capability of these machines. You could add a ISA game port as well, because IBM XT computers had no such ports. There were ISA parallel port cards for the IBM XT and its derivatives.

The IBM XT was introduced in 1983 by IBM, but derivatives were available as IBM XT compatibles. The IBM AT was released 1 year later, and it was too was discontinued in the same year(1987) as the IBM XT. The common characteristics of these early computers, like the IBM PC, XT, and AT were that they didn't have many ports, like modern computers. However, they did have a lot of expansion ports in the form of ISA slots.

The 8088 4.77 MHz version was extremely slow, and many didn't even have hard drives. I always wanted to see what kind of upgrades you could make to this computer. Today, you will be able to see what a maxed out IBM XT can do.
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[Machine Specs]

♦ CPU: 8088 16 Mhz
♦ Graphics: VGA
♦ Sound: Adlib
♦ Floppy Disks
• A: 5.25" FDD 360 kb
• B: 3.5" FDD 720 kb
♦ HDDs
• 30 MB
• 30 MB
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{Autoexec.bat}

C:\Drivers\Mouse\Mouse.com
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[Links]

♦ PCEM
• https://pcem-emulator.co.uk/
♦ MS-DOS 5.0
• https://winworldpc.com/product/ms-dos/50
♦ MS-DOS 3.3
• https://winworldpc.com/download/c2a9c...
♦ PCEM BIOS
• https://archive.org/details/pcem-roms...
• https://archive.org/details/pcemv14win.
♦ Adlib Disk 1.63
• https://archive.org/details/adlib_202306
♦ Mouse Driver 5.0
• https://winworldpc.com/product/micros...
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