View source for Commstar v21/23 modem

[[Image:Commstar v21-23 modem.jpg|right|thumb|250px|The modem and interface]]

A package that consists of an Amstrad modem by Pace and the [[PACE]] serial interface.

<gallery>
File:ACU8701002.jpg|Advert (ACU, January 1987)
File:Pace_modem_front.jpg
File:Pace_modem_back.jpg
File:Pace_modem_user_guide.jpg
File:Pace_modem_plugged_in.jpg
File:Pace_RS232_Serial_Interface.jpg
File:Pace_RS232_Serial_Interface_inside.jpg
File:Pace_RS232_Serial_Interface_User_Guide.jpg
</gallery>

=Pace RS232 Serial Interface with Extra ROM Board=
This is a different version of the RS232 shown above, featuring the Serial Interface, but with a separate ROM board below. 

This could be modified with 2 pins and a capacitor to work as a x4 ROM box. Pic.4 below shows the modified board.

<gallery>
File:Pace-rs232-above.jpg
File:Pace-rs232-side.jpg
File:Pace-rs232-lower.jpg
File:Pace-rs232-modified-romboar.jpg
File:Pace-interface-bottom.jpg
File:Pace-romboard-bottom.jpg
</gallery>


[[Media:RS232_Pace_Interface-Commstar.zip|Commstar Manual (EN)]]

 [[Category:Peripherals]] [[Category:Serial interfaces]][[Category:Network]]
[[Category:Stub]]