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AC1 interface card

The AC1 card is a half length 8-bit ISA expansion card that is designed to fit into one of the 8-bit expansion slots provided in a PC.

AC1 card

 

Attention electrostatic sensitive label The AC1 contains static sensitive components. Observe anti-static handling precautions, including the use of earth straps during handling and installation.

   

AC1 I/O space base address

The AC1 is supplied set to I/O base address 200H, which is often allocated to the games adaptor. If this address is already used, or the PC has diffi culty in accessing the card, then the base address can be changed to one of the following by altering the switches on the card as shown below.

 

PC function

Address

Switch (SW1) Way 1

Switch (SW1) Way 2

Switch (SW1) Way 3

Games adaptor

200H

 Off

 Off

 Not used

PC expansion port

210H

 On

 Off

 Not used

Prototype adaptor

300H

 On

 On

 Not used

Prototype adaptor

310H

 Off

 On

 Not used

NOTE: As with most adaptor cards, only the lower 10 address bits on the PC expansion bus are decoded. Clashes are possible with the addresses of other adaptor cards if their base addresses are set above 400H and the lower 10 bits match the AC1 addresses.

AC1 Installation

  1. Remove power from the PC.
  2. Remove external covers of the PC (observe antistatic precautions).
  3. Locate a vacant expansion slot (8 or 16-bit) into which the card can be fitted.
  4. Remove the expansion slot panel on the rear panel of the PC.
  5. Carefully insert the card into the slot in accordance to the PC manufacturer’s instructions, ensuring that no parts on the board touch any other adaptor boards or clash with any other parts of the PC.
  6. Screw the mounting bracket of the AC1 to the PC back panel rail.  Check the installation.
  7. Replace the covers of the PC.

The nominal current consumption of the AC1 in normal operation with the probe connected is:

593 mA @ 5 V

17 mA @ 12 V

10.86 mA @ 12 v