315-5356: Difference between revisions
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== Notes == | == Notes == | ||
*Read and write access to the uPD71051 chip is at address $7800 | |||
*Pin 16 is not connected on the PCB but has equations mapped to address $7C00 which is appears to be unused in the code | |||
Revision as of 11:12, 27 December 2022
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Equations
Name 315-5356; PartNo ; Date ; Revision ; Designer Porchy; Company ; Assembly ; Location ; Device g16v8; /* Dedicated input pins */ pin 1 = A15; /* Input */ pin 2 = A14; /* Input */ pin 3 = A13; /* Input */ pin 4 = A12; /* Input */ pin 5 = A11; /* Input */ pin 6 = A10; /* Input */ pin 7 = A19; /* Input */ pin 8 = RD; /* Input */ pin 9 = WR; /* Input */ pin 11 = RFSH; /* Input */ /* Programmable output pins */ pin 12 = WR-OUT; /* Combinatorial output */ pin 13 = MREQ; /* Input */ pin 14 = NMI; /* Fixed high output */ pin 15 = A0; /* Unused input */ pin 16 = NC; /* Combinatorial output */ pin 17 = RXRDY; /* Unused input */ pin 18 = RESET; /* Unused input */ pin 19 = RD-OUT; /* Combinatorial output */ /* Output equations */ !RD-OUT = !A15 & A14 & A13 & A12 & A11 & !A10 & !A19 & !RD & RFSH & !MREQ; !NC = !A15 & A14 & A13 & A12 & A11 & !A10 & A19 & RFSH & !MREQ; NMI = 'b'1; !WR-OUT = !A15 & A14 & A13 & A12 & A11 & !A10 & !A19 & !WR & RFSH & !MREQ; /* End */
Notes
- Read and write access to the uPD71051 chip is at address $7800
- Pin 16 is not connected on the PCB but has equations mapped to address $7C00 which is appears to be unused in the code