Voyager 1 FDS Computer Emulator

# Voyager FDS Emulator | Flight Data Subsystem Source: [https://zaneham.github.io/voyager-fds-emulator/](https://zaneham.github.io/voyager-fds-emulator/) MARINER JUPITER\-SATURN '77 Flight Data Subsystem Emulator • 806\.4 kHz • 8K × 16\-bit CMOS Voyager 1 Current Distance 24,596,234,112km Signal delay:22h 51mone\-way ◈ Instructions `MLD`Load mem→RA `MRD`Store RA→mem `ADD`RA \+ mem `SUB`RA \- mem `AND`RA & mem `JMP`Jump `SKZ`Skip if zero `SKP`Skip if \+ `WAT`Halt `DW`Define word ## ◈ Architecture Clock 806\.4 kHz ~400,000 instructions/sec Cycle Time 2\.48 µs Glacial by modern standards Memory 8K × 16\-bit CMOS RAM, two 4K banks Registers RA, RB \+ 128 Working \+ special registers Serial I/O 32 in / 16 out For all those instruments DMA 4 channels MDS, DSS, ISS, PRA @ 115\.2 kbps Interrupt 2\.5 ms Periodic error recovery Word Size 16\-bit 12\-bit addresses, 4\-bit opcode **Original Documentation** The[docs folder](https://github.com/Zaneham/voyager-fds-emulator/tree/master/docs)contains scanned JPL documentation from 1974\-1977, preserved by Wichita State University Special Collections\.