Serial adapters

CTC Versanet serial adapter

The correct switch settings for the 8AT and 4AT are:

As a COM1 (strapped at addr 0x160, using IRQ4) the 8AT has:
- switches 33, 35, 36, 38, 39 & 40 OFF
- switches 34, 37 ON (that is, shunted)
on the DIP switch selection:
- 5, 6 & 8 should be OFF
- all the others should be ON
As a COM2 (strapped at addr 0x218, using IRQ3) the 8AT has:
- switches 33, 35-40 OFF
- switch 34 ON (that is, shunted)
on the DIP switch selection:
- 1, 2 & 7 should be OFF
- all the others should be ON

The 4AT is the same as the 8AT in both the above cases, with the following common exception: switches 39 & 40 must be ON (shunted). These adapters come in both 8250 and 16450 versions. You must have the 16450 version.

The original CTC Versanet adapters used different addresses. Please ask your hardware vendor for Versanet adapters strapping at the above addresses (0x160 and 0x218).

The CTC ``Maomao-4'' serial adapter is not supported.