…https://www.amazon.com/Advanced-TRS-80-Level-II-BASIC/dp/047... TI-99/4a: https://www.amazon.com/Introduction-TI-BASIC-TI-99-4A/dp/081... Visual basic for dos: https://www.amazon.com/Visual-MS-DOS-Prentice-Innovative-Tec... VIC-20: https://www.amazon.com/Vic-BASIC-User-Friendly-Guide/dp/0835... Here is the full TRS-80 text: https://archive.org/details/trs-80-level-ii-basic-a-self-tea... Who were these guys? They were all over the map.
继 1977/78 年买的 PET 2001 之后，我又买了一台 Commodore Vic-20。照着《用计算器做实用天文观测》（Practical Astronomy with Your Calculator）这本书，我用 Vic BASIC（跟 PET 上的基本一样）写了个程序，根据从地球上看木星四颗最显著卫星的椭圆轨道平面处于侧面边缘的状态来识别它们。我想找个方法，能站在布鲁克林的自家屋顶上……
After my PET 2001 I had purchased in 1977/78, I bought a Commodore Vic-20. Using the book, "Practical Astronomy with Your Calculator", I wrote a program in Vic BASIC which was the same as the PET's to identify the four most prominent moons of Jupiter based on their elliptical plane being on edge when viewed from Earth. I wanted a way of going on my roof in Brooklyn…
……https://www.amazon.com/Advanced-TRS-80-Level-II-BASIC/dp/047... TI-99/4a: https://www.amazon.com/Introduction-TI-BASIC-TI-99-4A/dp/081... Visual basic for dos: https://www.amazon.com/Visual-MS-DOS-Prentice-Innovative-Tec... VIC-20: https://www.amazon.com/Vic-BASIC-User-Friendly-Guide/dp/0835... 这里是 TRS-80 的完整文本：https://archive.org/details/trs-80-level-ii-basic-a-self-tea... 这帮人到底是谁啊？他们涉猎的领域也太漫无边际了。
…https://www.amazon.com/Advanced-TRS-80-Level-II-BASIC/dp/047... TI-99/4a: https://www.amazon.com/Introduction-TI-BASIC-TI-99-4A/dp/081... Visual basic for dos: https://www.amazon.com/Visual-MS-DOS-Prentice-Innovative-Tec... VIC-20: https://www.amazon.com/Vic-BASIC-User-Friendly-Guide/dp/0835... Here is the full TRS-80 text: https://archive.org/details/trs-80-level-ii-basic-a-self-tea... Who were these guys? They were all over the map.
继 1977/78 年买的 PET 2001 之后，我又买了一台 Commodore Vic-20。照着《用计算器做实用天文观测》（Practical Astronomy with Your Calculator）这本书，我用 Vic BASIC（跟 PET 上的基本一样）写了个程序，根据从地球上看木星四颗最显著卫星的椭圆轨道平面处于侧面边缘的状态来识别它们。我想找个方法，能站在布鲁克林的自家屋顶上……
After my PET 2001 I had purchased in 1977/78, I bought a Commodore Vic-20. Using the book, "Practical Astronomy with Your Calculator", I wrote a program in Vic BASIC which was the same as the PET's to identify the four most prominent moons of Jupiter based on their elliptical plane being on edge when viewed from Earth. I wanted a way of going on my roof in Brooklyn…