SWTPc S/09 is alive

For my machine, it ended up being something pretty simple. On the S/09, all of the baud rate generation stuff was moved off of the CPU board onto the MP-ID bridgecard, along with all of the addressing logic from the backplane. There are a number of different jumpers which, in various combinations, control the baud rate generators but I didn't have any of the docs for the MP-ID. It appeared that everything was set for 9600 baud, but a few days ago I finally got the docs for the MP-ID and it showed that the jumper that controlled the low/hi baud rate line was set for Hi, for 38400, vice low, for 9600. Yesterday we used Eric's Televideo hooked up to both machines..today I used my Altos III to repeat the tests we ran from the monitor program. As Eric mentioned, there are a number of interesting differences between the machines, though externally they appear identical. Among the more interesting things is that mine has a totally passive backplane while his has various logic onboard, this logic being moved to the MP-ID bridgecard on my system. Also, according to scans of SWTPc catalog pages, it shows that my machine is capable of addressing up to 768k while the 69/K is shown as being able to address up to 56k, though the MP-09 cpu board is shown as being able to address up to 384k. Both of our machines had 56k installed, though nearly every board in mine had various modifications and jumper wires whereas his tended to be untouched. Though this is easily changed, his also had just the basic monitor ROM while mine previously had two additional ROMs installed to support OS/9, as well as modifications to the CPU board to better support FLEX/UNIFLEX. Jeff -- Collector of Classic Microcomputers and Video Game Systems: Home of the TRS-80 Model 2000 FAQ File http://www.geocities.com/siliconvalley/lakes/6757