Epson Equity III Product Manual page 7

Memory Board
Jumper
1 2 3 4 5 6 7
A A A
B A A
B B A
B B B
A A
B B
A A
B B
* Factory Settings
Multifunction Board
lumper
2 3 4 5 6 7 8
A
3 A
B
3 B
A A
A B
B A
B B
A A
A B
B
A
B
A
B
* Factory Settings
Equity Series Computers
Function
* RAM 640KB
RAM 512KB
RAM 256KB
EPROM 21728 type
* EPROM 27256 type
* Select ROM sockets
24A and 248
Select ROM sockets
23A and 23B
Function
9 10
* Primary register set (AT FDC)
Secondary register set (AT FDC)
PC register set (FDC)
Disable FDC register set
A * Primary parallel I/F, IRQ7
Secondary parallel I/F, IRQ5
B
Video adapter parallel I/F, IRQ7
A
Disable parallel I/F
* Primary serial I/F, IRQ4
A
Secondary serial I/F, IRQ3
B
Disable serial I/F
* AT compatible FDD I/F
Equity Ill FDD I/F
* Standard setting
Test mode of VCO
12/12/88
EQUITY III + (10 MHz)
I/O Port Addresses
Address
Interrupt Controller 1
D20 - 03F
Timer/Counter
Keyboard controller and Port B
CMOS RAM and Non - Maskable Interrupt Mask
DMA Page Register
OAO-OBF Interrupt Controller 2
Hard Disk Controller - Primary
278 - 27F Parallel Port 1
Serial Port 1
378 - 37F Parallel Port 0
3F0 -3F7 Floppy Disk Controller
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.
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.
Function
This disables the keyboard so no
EQIII + - 7