JPH02130041U

JPH02130041U -

Info

Publication number: JPH02130041U
Application number: JP3690789U
Authority: JP
Priority date: 1989-03-30
Filing date: 1989-03-30
Publication date: 1990-10-26

Description

[Brief explanation of drawings]

図はこの考案のＲＯＭプログラムデバツグ装置
の一実施例を示す図であり、１……表示装置、２……プログラム変更開始ア
ドレス設定装置、３……プログラムカウンタ、４
……停止アドレス保持レジスタ、５……第１の比
較器、６……停止割り込み発生装置、７……メモ
リ装置、８……レジスタ、９……演算装置、１０
……プログラム変更開始アドレス設定装置、１１
……メモリ書込み装置、１２……プログラム変更
開始アドレス保持レジスタ、１３……第２の比較
器、１４……プログラム実行アドレス制御装置、
１５……１命令実行装置、１６…インクリメント
回路、１７……セレクタである。 The figure is a diagram showing an embodiment of the ROM program debugging device of this invention, and includes: 1... display device, 2... program change start address setting device, 3... program counter, 4
...Stop address holding register, 5...First comparator, 6...Stop interrupt generator, 7...Memory device, 8...Register, 9...Arithmetic unit, 10
...Program change start address setting device, 11
... Memory writing device, 12 ... Program change start address holding register, 13 ... Second comparator, 14 ... Program execution address control device,
15...1 instruction execution device, 16...increment circuit, 17...selector.

Claims

[Scope of utility model registration request]

In order to debug a program on a ROM (read only memory), a stop address setting device sets a program stop address, a stop address holding register holds the stop address,
An increment circuit for adding 1 to the output of the stop address holding register, a one-instruction execution device for executing only one instruction of the program, and an output of the one-instruction execution device to control the output of the stop address setting device or a selector that selects the output of the increment circuit and outputs it to the stop address holding register; a program counter that holds the execution address of the program; and a first selector that compares the contents of this program counter with the contents of the stop address holding register. a comparator, a stop interrupt generator that inputs the comparison signal from the first comparator and generates a stop interrupt, a program change start address setting device that sets a program change start address, and this program change start address setting device. A program change start address holding register that holds the address set from , a second comparator that compares the contents of this program change start address holding register with the contents of the program counter, and a comparison signal from this second comparator. a program address control device that inputs and controls the execution address of the program, a memory device that writes the changed contents of the program, a memory writing device that writes the program to this memory device, an arithmetic device that performs calculations, and this arithmetic device. A ROM program debugging device having a register for holding an output from the memory device, and a display device for displaying the contents of this register and the contents of the memory device,
A function to stop the execution of programs on ROM,
An RO characterized by having a function of executing a program on a ROM one instruction at a time and a function equivalent to changing the contents of a program on a ROM.
M program debugging device.