发明名称 |
Method and apparatus for overriding a ROM routine in response to a reset |
摘要 |
An electronic device comprising a state machine is coupled between the ROM and its socket. When armed by an arming sequence, the device responds to an address from a microprocessor during a reset operation to modify the output of the ROM. The modified output causes a jump to a routine in RAM rather than a jump in an initialization routine in the ROM. This enables a user to change the microprocessor's addressing mode from protected to real without a complete initialization of the system. Arming of the device and reset of microprocessor is caused by a protected mode routine, and after reset the mircroprocessor processes a real mode routine.
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申请公布号 |
US5018062(A) |
申请公布日期 |
1991.05.21 |
申请号 |
US19870113746 |
申请日期 |
1987.10.23 |
申请人 |
A.I. ARCHITECTS, INC. |
发明人 |
CULLER, DAVID E.;PAPADOPOULOS, GREGORY M.;SCHNEIDER, RICHARD P. |
分类号 |
G06F9/32 |
主分类号 |
G06F9/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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