Found on...[edit]
Equations[edit]
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 */
- 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
