New Breadboard 8088 PC V2 #22 Shadow VGA BIOS & 8 Bit ISA Bus Wait States

Описание: The twenty second in a new a series of videos to create a retro Intel 8088/8086 PC on solderless breadboards and learn about how computer hardware and software works. I'll be using new Intersil 80C88 series chips and modern components where possible. In this video we fix add an 8 Bit ISA bus connector to the Breadboard PC and try to get an ISA Bus VGA Card to work.

Note WinCUPL II Beta is now available. I would use this in preference to WinCUPL and has better documentation https://www.microchip.com/en-us/devel...

COMPAQ DeskPro 386 Documentation https://www.pcjs.org/machines/pcx86/c...
VGA BIOS files https://www.minuszerodegrees.net/rom/...

Sergey Kiselev XI-8088 PC, BIOS & Super VGA Card
https://github.com/skiselev/isa-super...
https://github.com/skiselev/8088_bios
https://github.com/skiselev/xi_8088

IBM Technical Reference Guides
PC Jr Technical Reference Guide https://minuszerodegrees.net/manuals/...
IBM 5.25" Diskette Drive Adapter Manual https://minuszerodegrees.net/oa/OA%20...

New BBPC Version 2 Github https://github.com/breadboardinglabs/...


New Breadboard PC Videos you may have missed
Playlist for Breadboard PC V2    • New Breadboard PC Version 2  

Breadboarding Labs Channel    / @breadboardinglabs  
BBPC V1 Playlist    • Breadboard PC  

Breadboarding Tips    • Breadboarding Tips  
Improving Breadboard Power    • Nanocomp 6809 #17.1 Improving Breadboard P...  
Breadboarding Introduction Video "Prototyping and Experimenting with Breadboards"    • Prototyping and Experimenting with Breadbo...  

6809 Project Videos
Nanocomp 6809 Introduction Video    • Nanocomp 6809 #1 Introduction - 8 Bit Brea...  
Breadboard VGA in 15 minutes runs Tetris    • Breadboard VGA in 15 minutes runs Tetris -...  
Nanocomp 6809 in 10 Minutes    • 8 Bit Breadboard Micro Made in 10 Minutes ...  
Nanocomp 6809 on Hackaday.io https://hackaday.io/project/188095-na....

Chapters
0:00 Introduction
0:47 ISA Bus Wait States
3:16 Checksum problem
4:25 Video ROM corruption problem
6:10 How to fix?
8:43 Memory Map & new Upper Memory
10:25 Upper Memory PLD changes
11:36 Shadow VGA BIOS to RAM
14:38 Adding Wait States
19:18 Testing boot to MS-DOS 3.30
20:10 Summary and Next Video