Connecting a 6522 VIA to an ATA IDE bus
---------------------------------------


Designed for a Synertek SYM-1, and its AA Expansion connector.


PORTB0-7 maps to DATA0-7 on IDE
PORTA0 = ADDR0
PORTA1 = ADDR1
PORTA2 = ADDR2
PORTA3 = /RD
PORTA4 = /WR
PORTA5 = /CS0


AA-pin         AAname*                  IDE


1               GND                2,19,22,24,26,30,40,Power-
3               A1                    15 (DATA1)
7               B5                    37 (/CS0)
8               B3                    25 (/RD)
9               B1                    33 (ADDR1)
10              A7                    3  (DATA7)
11              A5                    7  (DATA5)
12              A3                    11 (DATA3)
13              RESET                 1  (jumpered)


A               Vcc                 Power+
C               A2                   13 (DATA2)
D               A0                   17 (DATA0)
J               B4                   23 (/WR)
K               B2                   36 (ADDR2)
L               B0                   35 (ADDR0)
M               A6                   5  (DATA6)
N               A4                   9  (DATA4)
                                     27 (IORDY) - tie low 10kR
                                     29 (DMACK) - tie high 1kR
                                     38 (/CS1)  - tie high 1kR
                                     39 (DASP)  - LED+180R to Vcc

-- Chris Baird,, cjb@brushtail.apana.org.au Feb2010. Corrected IORDY and DASP: 2010-Jul-31