X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f X-Recipient: djgpp AT delorie DOT com From: "Gerrit van Niekerk" Organization: GPvNO To: djgpp AT delorie DOT com Date: Mon, 21 Jan 2008 19:48:29 +0200 MIME-Version: 1.0 Subject: Re: BIOSCOM Message-ID: <4794F70D.26311.C2A8969@gerritvn.gpvno.co.za> In-reply-to: References: <200801202022 DOT m0KKMLg0001310 AT delorie DOT com>, <200801211557 DOT m0LFvllP023881 AT envy DOT delorie DOT com>, X-mailer: Pegasus Mail for Windows (4.41) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Content-description: Mail message body Reply-To: djgpp AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: djgpp AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On 21 Jan 2008 at 17:21, Luis Gouveia wrote: > > To get higher speeds, you need hardware-specific code. > Huumm... Hyperterminal is no hardware-specific and does it > very well at 57600! BIOSCOM as the name says, uses the BIOS functions which are simple polling functions. You will be lucky to receive reliably even at 9600 baud. For higher speeds you need to use interrupts and need an ISR, perhaps even a dual Protected Mode/Real Mode one. Hyperterminal uses the Windows kernel-mode driver, so there is no comparison.