Ultratec Minicom IV

teclado

(*) Informações presumidas, com base em aparentes simetrias do circuito.
74373 = CI U18 na pcb (octal D-Type latch with 3-state outputs)

pino 35 (/EA ?!)

seleciona grupo:

• 1 (74373 D0 => pino 10, RST ?!) (*)
• 2 (74373 D1 => pino 9, P1.7) (*)
• 3 (74373 D2 => pino 8, P1.6) (*)
• 4 (74373 D3 => pino 7, P1.5)
• 5 (74373 D4 => pino 6, P1.4) (*)
• 6 (74373 D5 => pino 5, P1.3) (*)
• 7 (74373 D6 => pino 4, P1.2)
• 8 (74373 D7 => pino 3, P1.1) (*)

pino 36 (P0.7)

seleciona grupo:

• 9 (74373 D0 => pino 10, RST ?!) (*)
• 0 (74373 D1 => pino 9, P1.7) (*)
• = (74373 D2 => pino 8, P1.6) (*)
• backspace (74373 D3 => pino 7, P1.5)
• I (74373 D4 => pino 6, P1.4) (*)
• O (74373 D5 => pino 5, P1.3) (*)
• P (74373 D6 => pino 4, P1.2)
• return (74373 D7 => pino 3, P1.1) (*)

pino 37 (P0.6)

seleciona grupo:

• ESC (74373 D0 => pino 10, RST ?!) (*)
• Q (74373 D1 => pino 9, P1.7) (*)
• W (74373 D2 => pino 8, P1.6) (*)
• E (74373 D3 => pino 7, P1.5)
• R (74373 D4 => pino 6, P1.4) (*)
• T (74373 D5 => pino 5, P1.3) (*)
• Y (74373 D6 => pino 4, P1.2)
• U (74373 D7 => pino 3, P1.1) (*)

pino 38 (P0.5)

Seleciona grupo (apenas 7 teclas):

• A (74373 D1 => pino 9, P1.7) (*)
• S (74373 D2 => pino 8, P1.6) (*)
• D (74373 D3 => pino 7, P1.5)
• F (74373 D4 => pino 6, P1.4) (*)
• G (74373 D5 => pino 5, P1.3) (*)
• H (74373 D6 => pino 4, P1.2)
• J (74373 D7 => pino 3, P1.1) (*)

pino 40 (P0.3)

Seleciona grupo (apenas 7 teclas):

• Z (74373 D1 => pino 9, P1.7) (*)
• X (74373 D2 => pino 8, P1.6) (*)
• C (74373 D3 => pino 7, P1.5)
• V (74373 D4 => pino 6, P1.4) (*)
• B (74373 D5 => pino 5, P1.3) (*)
• N (74373 D6 => pino 4, P1.2)
• M (74373 D7 => pino 3, P1.1) (*)