Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM
193h BYTE "STNAD"
198h BYTE "NSDS"
Note: offsets are from the interrupt handler's segment
--------H-0D---------------------------------
INT 0D C - IRQ5 - FIXED DISK (PC,XT), LPT2 (AT), reserved (PS/2)
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
SeeAlso: INT 0E"IRQ6",INT 0F"IRQ7",INT 55"DESQview",INT 5D"DoubleDOS"
SeeAlso: INT 7D"GO32"
--------H-0D---------------------------------
INT 0D C - IRQ5 - Tandy 1000 60 Hz RAM REFRESH
Desc: used to ensure that the dynamic RAM retains its contents in earlier
1000-series models; later models use normal DMA for RAM refresh
(some early models have no DMA unless it is added via an expansion
card)
SeeAlso: INT 55
--------h-0D---------------------------------
INT 0D - HP 95LX - INFRARED INTERRUPT
Desc: this interrupt is used to perform communications over the infrared
data link
SeeAlso: INT 0B"HP 95LX",INT 0E"HP 95LX",INT 15/AX=4DD4h
--------C-0D---------------------------------
INT 0D C - CPU-generated (80286+) - GENERAL PROTECTION VIOLATION
Desc: the CPU generates this interrupt when it detects a protection violation
which does not fit under any other category having a separate
interrupt
Notes: called in real mode when
an instruction accesses a memory operand extending beyond offset
FFFFh (i.e. WORD at FFFFh or DWORD at FFFDh or higher) in segment
-23-
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