| 摘要 |
The circuit for using one printer with a number of MSX networked computers in common comprises: a data communication part composed of a CPU (1), a communication processor (2), a ROM (3), a RAM (4), a data selector (7), a buffer (9) reading peculiar number from the CPU through the data selector, a buffer (9), a switch (12), a D flip-flop (15), a LED (23), a line driver, mdular jacks (21,22), and a cable (24); a printer control part composed of a CPU (26), a ROM (25), data selectors (29,30,32), D flip-flops (31,35-37), binary counters (39,40), an address decoder (33), a latch (34), a printer jack (38), RAMs (27,28), buffers (10,11,18), and gates; and an interface part composed of latches (13,20), buffers (10,11,18), a data selector (8), a bidirectional buffer (19), a D flip-flop (14), address decoders (16,17), and gates.
|
