summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/machine/z80pio.h
diff options
context:
space:
mode:
author Curt Coder <curtcoder@mail.com>2008-10-13 14:16:07 +0000
committer Curt Coder <curtcoder@mail.com>2008-10-13 14:16:07 +0000
commit3d85b66c5e0e6683feba4e623f19bd6ae3fa9b6f (patch)
tree4e4f16090c6ed4c0e63c6757460ac21711f14885 /src/emu/machine/z80pio.h
parent0fddfa1a446daae73ad2aadf15af27336082f0bc (diff)
Added pinout, not worth mentioning in whatsnew.
Diffstat (limited to 'src/emu/machine/z80pio.h')
-rw-r--r--src/emu/machine/z80pio.h25
1 files changed, 24 insertions, 1 deletions
diff --git a/src/emu/machine/z80pio.h b/src/emu/machine/z80pio.h
index 642ee12626f..4534078589d 100644
--- a/src/emu/machine/z80pio.h
+++ b/src/emu/machine/z80pio.h
@@ -1,10 +1,33 @@
/***************************************************************************
- Z80 PIO implementation
+ Z80 PIO (Z8420) implementation
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
+***************************************************************************
+ _____ _____
+ D2 1 |* \_/ | 40 D3
+ D7 2 | | 39 D4
+ D6 3 | | 38 D5
+ _CE 4 | | 37 _M1
+ C/_D 5 | | 36 _IORQ
+ B/_A 6 | | 35 RD
+ PA7 7 | | 34 PB7
+ PA6 8 | | 33 PB6
+ PA5 9 | | 32 PB5
+ PA4 10 | Z80-PIO | 31 PB4
+ GND 11 | | 30 PB3
+ PA3 12 | | 29 PB2
+ PA2 13 | | 28 PB1
+ PA1 14 | | 27 PB0
+ PA0 15 | | 26 +5V
+ _ASTB 16 | | 25 CLK
+ _BSTB 17 | | 24 IEI
+ ARDY 18 | | 23 _INT
+ D0 19 | | 22 IEO
+ D1 20 |_____________| 21 BRDY
+
***************************************************************************/
#ifndef __Z80PIO_H__