ROMS: Difference between revisions
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(→23128) |
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1 of this IC make the ROM of the [[ZX Spectrum 16K/48K]]. | 1 of this IC make the ROM of the [[ZX Spectrum 16K/48K]]. | ||
e.g. NEC UPD23128 | e.g. NEC UPD23128 or Hitachi HN613128P | ||
Pinout: | Pinout: | ||
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|| | || | ||
] V<sub>CC</sub><br> | ] V<sub>CC</sub><br> | ||
] CS<br> | ] {{overline|OE<sub>1</sub>}}/(CS)<br> | ||
] A<sub>13</sub><br> | ] A<sub>13</sub><br> | ||
] A<sub>8</sub><br> | ] A<sub>8</sub><br> | ||
] A<sub>9</sub><br> | ] A<sub>9</sub><br> | ||
] A<sub>11</sub><br> | ] A<sub>11</sub><br> | ||
] OE/(OD)<br> | ] {{overline|OE<sub>0</sub>}}/(OD)<br> | ||
] A<sub>10</sub><br> | ] A<sub>10</sub><br> | ||
] {{overline|OE}}<br> | ] {{overline|CS}}/({{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> | ||
Revision as of 16:58, 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 or Hitachi HN613128P
Pinout:
|
NC [ |
1 ° 28 |
] VCC |