Re: Plus/4 RS232 woes

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Wed, 5 Sep 2018 16:39:44 +0200 Message-ID: <35d3063f-16fb-7d5f-c911-f89ebe4f6459@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 09/05/2018 11:20 AM, Pasi 'A1bert' Ojala wrote:
> 
> XTAL2 is a buffered (inverse of) XTAL1, so XTAL2 and XTAL1 with a 
> crystal, load capacitors and possible bias resistor create an oscillator 
> amplifier circuit, and thus generating a clock signal to XTAL1.

The 6551 doesn't need capacitors or resistors. All you need is to 
connect the crystal to the two XTAL pins and you're done.

  Gerrit