From 53e61f61711e0793faae065a06782f928f3c6dec Mon Sep 17 00:00:00 2001 From: Michaƫl Banaan Ananas Date: Mon, 6 Oct 2014 16:02:37 +0000 Subject: upon reading datasheet further, it became obvious that uPD71054 == 82C54 --- src/emu/machine/pit8253.h | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) (limited to 'src/emu/machine/pit8253.h') diff --git a/src/emu/machine/pit8253.h b/src/emu/machine/pit8253.h index 3f736926b42..aa3997d4766 100644 --- a/src/emu/machine/pit8253.h +++ b/src/emu/machine/pit8253.h @@ -11,13 +11,33 @@ D4 4 | | 21 _CS D3 5 | | 20 A1 D2 6 | 8253 | 19 A0 - D1 7 | | 18 CLK2 + D1 7 | 8254 | 18 CLK2 D0 8 | | 17 OUT2 CLK0 9 | | 16 GATE2 OUT0 10 | | 15 CLK1 GATE0 11 | | 14 GATE1 GND 12 |_____________| 13 OUT1 + +********************************************************************** + _____ _____ + D7 <-> 1 |* \_/ | 24 --- Vdd + D6 <-> 2 | | 23 <-- _WR + D5 <-> 3 | | 22 <-- _RD + D4 <-> 4 | | 21 <-- _CS + D3 <-> 5 | | 20 <-- A1 + D2 <-> 6 | uPD71054C | 19 <-- A0 + D1 <-> 7 | | 18 <-- CLK2 + D0 <-> 8 | | 17 --> OUT2 + CLK0 --> 9 | | 16 <-- GATE2 + OUT0 <-- 10 | | 15 <-- CLK1 + GATE0 --> 11 | | 14 <-- GATE1 + GND --- 12 |_____________| 13 --> OUT1 + + uPD71054C (8MHz), uPD71054C-10 (10MHz) - it is a clone of Intel 82C54 + also available in 28-pin QFP and 44-pin PLCC (many pins NC) + + ***************************************************************************/ #ifndef __PIT8253_H__ -- cgit v1.2.3-70-g09d2