ZX Spectrum internals (Was: ZX81 kits)

From: Glen Goodwin <acme_ent_at_bellsouth.net>
Date: Tue Oct 9 22:19:41 2001

> My primary moan is those serial ports on the QL. There are 2 of them, and

> only one receiving cirucit. The Rx data lines from the 2 ports are
> logically ORed together and fed to the receiver. You have to make sure
> you external device obeys the handshake lines (no matter how slowly it
> sends characters), something that some devices plain can't do. An
> 'unbuffered' modem (i.e. just about any 300 baud modem) is a device that
> has problems working with the QL.
>
> -tony

A truly bogus design. Any idea why they did it that way?

Glen
0/0
Received on Tue Oct 09 2001 - 22:19:41 BST

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