Project IBM XT: My DTK Hexa I/O Plus Card Supports Two COM Ports, But... (Computerized Start™ Live) скачать в хорошем качестве

Project IBM XT: My DTK Hexa I/O Plus Card Supports Two COM Ports, But... (Computerized Start™ Live)

I have a few upgrades for the IBM XT 5160 that I am rebuilding from parts. Granted, I am not necessarily using the "correct" parts in all cases, and I am also not necessarily using vintage parts in all cases. But nevertheless, they are parts. I previously tried to upgrade my DTK Hexa 6-in-1 I/O card with a second UART plus the requisite RS-232 transceiver chips. However, that failed as I managed to find five UART chips (from that eBay lot of vintage ICs I opened during Wheel of Regrets™ a few months back) that all tested bad... for the exact same reasons! Given that I find it unlikely that five UARTs are testing bad for the exact same reasons, I need to step back and try to find a potential root cause. Sure, I could have a box of garbage chips, but I might also have something else wrong with the Hexa card. Will I find a cause to the failing UART chips? Will I get the second serial port working? Or will I conclude that more parts must be ordered? You'll have to watch to find out! * Ways to Support the Channel: ☕️ Tips or Support via Ko-fi: https://ko-fi.com/jdmcs 🈷️ Support me on Patreon:   / jdmcs   📦 Amazon Wishlist: https://jdmcs.net/wishlist ... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too! ** Read Computerized Start™, my Official Blog: https://jdmcs.net/myblog Follow me on Instagram: https://jdmcs.net/myinstagram Follow me on Twitter: https://jdmcs.net/mytwitter