ROMS: Difference between revisions
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] {{overline|OE}}<br> | ] {{overline|OE}}<br> | ||
] D<sub>7</sub>/(D<sub>8</sub>)<br> | ] D<sub>7</sub>/(D<sub>8</sub>)<br> | ||
] D<sub>6</sub>/(D<sub>7</sub><br> | ] D<sub>6</sub>/(D<sub>7</sub>)<br> | ||
] D<sub>5</sub>/(D<sub>6</sub><br> | ] D<sub>5</sub>/(D<sub>6</sub>)<br> | ||
] D<sub>4</sub>/(D<sub>5</sub><br> | ] D<sub>4</sub>/(D<sub>5</sub>)<br> | ||
] D<sub>3</sub>/(D<sub>4</sub><br> | ] D<sub>3</sub>/(D<sub>4</sub>)<br> | ||
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</div> | </div> | ||
Revision as of 16:31, 7 May 2021
ROMS
Read Only Memories used in ZX Spectrum machines.
23128
16Kx8 bit MASK programmable ROM chip
1 of this IC make the ROM of the ZX Spectrum 16K/48K.
e.g. NEC UPD23128
Pinout:
|
NC [ |
1 ° 28 |
] VCC |