Breakpoint detection circuit in a data processor and method ther

Details Breakpoint detection circuit in a data processor and method ther Breakpoint detection circuit in a data processor and method ther

1994-08-15

1998-02-10

Treat, William M.

Boots, shoes, and leggings

39518311, 395800, 395413, 3642674, G06F 942

Patent

active

057178518

ABSTRACT:
Existing chip select comparator logic (42) is used to compare a portion of the address value with a range of chip select addresses to provide a match signal for use by both the chip select logic (70) and a breakpoint logic circuit (50.x). The match signal is generated by the chip select logic circuit and is reused by the breakpoint logic circuit to perform a different and distinct function. By using the match signal and a breakpoint enable bit, the breakpoint logic circuit selectively asserts a breakpoint signal. Subsequently, a central processing unit (12) receives the breakpoint signal and initiates a breakpoint exception operation to determine whether the breakpoint condition is met and whether further action should be taken.

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IBM Technical Disclosure Bulletin, vol. 32, No. 2, published Jul. 1989, pp. 370-371, entitled "Breakpoint Bit Technique for an Address Compare Function."
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