Product information guide
EQUITY Ill + (12 MHz)
Memory Board
Jumper
1234567
Function
A A A
* RAM 640KB
B A A
RAM 512KB
B B A
RAM 256KB
B B B
RAM OKB
A A
EPROM 21728 type
B B
* EPROM 27256 type
A A
* Select ROM sockets
24A and 248
B B
Select ROM sockets
23A and 236
* Factory Settings
Multifunction Board
I/O Port Addresses
Address
Function
OOO-OlF
DMA Controller 1
020
-
03F
Interrupt Controller 1
040
-
05F
Timer/Counter
060
-
06F
Keyboard controller and Port B
070
-
07F
CMOS RAM and Non
-
Maskable Interrupt Mask
080-09F
DMA Page Register
OAO
-0BF
Interrupt Controller 2
OCO
-0DF
DMA Controller 2
OE0
-OFF Numeric Coprocessor
1FO
-
IF7 Hard Disk Controller
-
Primary
278
-
27F
Parallel Port 1
2F8
-2FF Serial Port 1
378
-
37F
Parallel Port 0
3BC -3BF Parallel Port 2 (on some video boards)
3Fo
-
3F7
Floppy Disk Controller
3F8-3FF
Serial Port 0
lumper Function
I 2 3 4 5 6 7 8 9 10
4
A
* Primary register set (AT FDC)
3 A
Secondary register set (AT FDC)
4
B
PC register set (FDC)
3 B
Disable FDC register set
A A
A
* Primary parallel I/F,
IRQ7
A B
B
Secondary parallel I/F,
IRQ5
B A
A
Video adapter parallel I/F,
IRQ7
B B
Disable parallel I/F
A A
A
* Primary serial I/F,
IRQ4
A B
B
Secondary serial I/F,
IRQ3
B
-
Disable serial I/F
A
* AT compatible FDD I/F
B
Equity III FDD I/F
A
* Standard setting
B
Test mode of VCO
Keylock
The keylock on the front panel allows you to disable the
keyboard and RESET button and lock the top cover of the
main unit for security. The keyboard may be locked while
the system is in operation. This disables the keyboard SO no
one can interfere with the current operation.
To lock the system, insert the key with the notch pointing
left and turn it clockwise. You must press it in slightly when
you turn the key. To unlock it, insert the key with the notch
pointing up and turn the key counterclockwise. You can
remove the key in either position.
l Factory Settings
Equity Series Computers
12/12/88
EQIII + - 3