[ale] Parallel & serial port cards?

[Boris Borisov]

I think these DAC worked only in real time with precise interrupts to give
you constant bitrate aka real time DOS . I doubt there would be +12/-12V on
serial port.

On Sun, Nov 15, 2020 at 5:02 PM Sam Rakowski <devnull at iamdevnull.info>
wrote:

> Somewhat related, I've always wondered (it hasn't been an issue for me
> *yet*) is whether those USB->RS232 adapters actually swing +/- 12V or they
> just stick to TTL levels or similar.
>
> Also, are there actual USB->parallel port adapters that truly provide a
> 'normal' parallel port, with each pin able to be controlled like GPIO pins?
> I'd like to make another one of those cheap 'n' dirty R-ladder "DACs" to
> enjoy the hi-fi output of the PC speaker for nostalgia's sake.
> Sent via BlackBerry
>
> -----Original Message-----
> From: Boris Borisov via Ale <ale at ale.org>
> Sender: "Ale" <ale-bounces at ale.org>Date: Sun, 15 Nov 2020 14:54:18
> To: Phil Turmel<philip at turmel.org>; Atlanta Linux Enthusiasts<ale at ale.org>
> Reply-To: Boris Borisov <bugyatl at gmail.com>,
>  Atlanta Linux Enthusiasts <ale at ale.org>
> Subject: Re: [ale] Parallel & serial port cards?
>
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