PC hardware port access from Java on Linux
问题 What is the Java-on-Linux equivalent to the C byte-sized PC-architecture hardware port input/output functions? For output there is outb as in this: tmp = inb(0x61); if (tmp != (tmp | 0x01)) outb(0x61, tmp | 0x01); For input there is inb as in this: tmp = (inb(0x61) & 0xfe); outb(0x61, tmp); Purpose: I want to implement something that imposes less overhead than this: try { Runtime.getRuntime().exec("beep") } catch (IOException e) {} as an alternative to sending code 7 (the bell char) to the