janzen@ant.dec.com (Tom 296-5421 LMO2/O23) (07/27/88)
Subj: mimetics interface works The Mimetics interface for the Amiga 1000 (which I am borrowing from a friend) was not compatible with the A500 for a few reasons. The gender of the connector was wrong. The A500 has a DB25-P on the back. The 1000 has a -S. Another reason was, that although the pin assignments are the same for data (TXD and RXD), the -5V and +5V are assigned to different pins. Here's a simple chart: MIDI inte A1000 A500 21 +5 9 2 TXD 2 3 RXD 3 7 gnd 7 14 -5 10 I built my interface cable to connect a DB-25S with the 500 pin out to a DB-25S with the 1000 pinout. The cable used a mass-terminated ribbon connector on the 1000 end and a solder tab or cylinder connector on the 500 end, and a ribbon cable (25 conductor). The pin numbers are printed on the connectors. I also had to build a straight-thru DIN plug to DIN plug pin 4 to pin 4, pin 5 to pin 5 (why doesn't LaSalles in Boston have plug-plug DIN adapters?) to connect the interface to a midi box. My interface works now from DMCS with no extra software beyond DMCS. Thanks Tom Janzen Digital Equipment 111 Locke Marlboro MA 01752