On 2024-05-26 12:30, Glen Slick via cctalk wrote:
  On Sun, May 26, 2024 at 4:26 AM Glen Slick
<glen.slick(a)gmail.com> wrote: 
  Anyway, if the SCM90448 EPROMs for your M8189 KDF11-B
are actually
 Motorola MC68764 / MC68766 EPROMs,  
I have one board with MCM68766 and two boards with SCM90448
  I have BP Microsystems device
 programmers that can handle those. I have programmed some of those
 myself for my own M8189 KDF11-B.  
Excellent!
  Are you looking to get set up with
 the 23-380E4 / 23-381E4 M8189-BG firmware? 
Yup! Actually hoping for:
MicroPDP-11/23 ROM v1.1 (23-453E4 and 23-454E4
  Those Motorola EPROMs require a Vpp of 25 volts, which
is probably why
 a lot of modem device programmers don't handle them. 
OK!