LSI-11 question

Jerome Fine replies: What was a GT40? I was asked recently to comment on a system which originally used a VT05 and then a VT52. I actually kept a working VT52. What was a VT05? Or at least what were the differences between a VT05 and a VT52? Incidentally, get a VT103. The standard memory size is 256 KBytes and if you re-wire the backplane, you can have all 4 MBytes. As far as I know, the RT11SJ in V5.4G required about 4800 bytes plus about 4100 bytes for the USR and something (about 500) for the device driver. That would leave only about 6 KBytes for the user job, probably not enough. Maybe the utilities are designed to work without the USR being there all the time and RT11SJ might work. Also, as far as I know, the VT11 support was still present in V5.4G of RT-11. Mentec has access to V5.3 of RT-11. Actually, everyone who wants to run V5.3 of RT-11 under a hobby license with the Supnik emulator can download V5.3 from gatekeeper. Megan Gentry made V5.3 available (or was very instrumental in doing so - thanks Megan) some time ago. Do you want the URL?