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Notes: Under DESQview, only the INT 15h vector and BASIC segment address (the word at 0000h:0510h) may be assumed to be valid for the handler's process. DOS 3.3+ revectors IRQ5 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ. The Tandy 1000, 1000A, and 1000HD use IRQ2 for the hard disk; the 1000EX, HX, RLX, RLX-HD, RLX-B, RLX-HD-B use IRQ5 instead; the 1000RL, RL-HD, SL, SL/2, TL, TL/2, and TL/3 are jumper-selectable for either IRQ2 or IRQ5 (default IRQ5); the 1000SX and TX are DIP-switch selectable for IRQ2 or IRQ5 (default IRQ2); the RSX and RSX-HD use IRQ14. Tandy systems which use IRQ2 for the hard disk interrupt use IRQ5 for vertical retrace.. May be masked by setting bit 5 on I/O port 21h
See Also: INT 0E"IRQ6" - INT 0F"IRQ7" - INT 55"DESQview" - INT 5D"DoubleDOS"
See Also: INT 7D"GO32"
Category: Hardware - Int 0Dh - I
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