发明名称 |
Teaching and entertainment device |
摘要 |
A teaching and entertainment device includes a desk-top console which supports a keyboard, an LCD display matrix, and a plug-in cartridge recepticle. A quartet of LCD drivers each control a quadrant of the display under the control of a first microprocessor. A plug-in cartridge is insertable into the console and contains a second microprocessor. Apparatus are provided for establishing a master/servant relationship of the second microprocessor over the first whenever the plug-in cartridge is present.
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申请公布号 |
US4492582(A) |
申请公布日期 |
1985.01.08 |
申请号 |
US19810222847 |
申请日期 |
1981.01.06 |
申请人 |
MATTEL, INC. |
发明人 |
CHANG, RICHARD S.;LING, JOHN Y.;SHOFF, DANIEL J. |
分类号 |
G09B5/00;G09B7/04;(IPC1-7):G09B7/02;G09B13/00 |
主分类号 |
G09B5/00 |
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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