Unverified50% confidenceFactExact time
In DOS games, programs set display modes via INT 10h interrupts, draw pixels by writing directly to the 0xA000 segment video memory address, perform file operations via INT 21h, and are subject to a conventional memory limit of 640 KB
1
Sources
50%
Confidence
Long-term
Relevance
8/9/2026
First Seen
Sources
逆向工程DOS游戏《圣经船长》：一场技术考古之旅
Related Claims
UnverifiedDOS provides system services such as file operations and memory allocation through INT 21h, while BIOS provides a hardware abstraction layer through INT 10h (video), INT 13h (disk), INT 16h (keyboard), and others.80% similarUnverifiedIn a DOS environment, programs run in the CPU's real mode, using 16-bit registers and a segmented memory model with an addressable space of only 1 MB78% similarUnverifiedReal mode uses 16-bit registers and a segmented memory model, calculating a 20-bit physical address by shifting the 16-bit segment register left by 4 bits and adding a 16-bit offset, with an addressable space of only 1MB.68% similar
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