PROGRAM LOADING METHOD

PURPOSE:To eliminate the need for a ROM stored with a program loader by storing the program loader and an update program on a memory card. CONSTITUTION:The program loader and update program are stored in an EPROM on the memory card 3. Then an inverter 5 has a pull-up resistance for a Vcc whose input...

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Bibliographic Details
Main Authors SHIKAUCHI NAOKI, HARA YOSHIYUKI
Format Patent
LanguageEnglish
Published 08.10.1992
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PURPOSE:To eliminate the need for a ROM stored with a program loader by storing the program loader and an update program on a memory card. CONSTITUTION:The program loader and update program are stored in an EPROM on the memory card 3. Then an inverter 5 has a pull-up resistance for a Vcc whose input is connected to a GND through the pattern of the memory card 3 only when the memory card 3 is connected. The output of the inverter 5 is inputted to a memory control circuit 4 as a memory card connection/ nonconnection signal. The memory control circuit 4 enables a flush type EPROM 2 when the memory card 3 is not connected and enables the EPROM on the memory card 3 when the memory card is connected. For the purpose, the memory card 3 is connected to put the program loader in operation and the update program stored in the EPROM can be written in the flush type EPROM 2.
Bibliography:Application Number: JP19910047834