I remember in 199x our stack was a single stack rtime8, spartados x, express!, diamond, miodiags or a language cart.... THIS WAS SCARY, and we built a support the tower.... but fun interesting, and just because you could...
as soon as possible we got the two cart connector version and kept the stack at 2 or 3 carts per slot. for non intelligent carts switches were added. It was convenient it worked and you didn't have move the computer out from under the hutch to plug/unplug everything all the time...
edit in response to incoming post
so long as the stack terminates with an active cart, it works just fine, much like a terminating resistor pack for any bus... issues can arise with any poorly done cart if things are left un terminated and just hanging out.
In any event, cart logic, not withstanding, you see my configuration working.... there are no issues, mio passes diagnostics and r/w tests with the full stack, with or without scsi drive attached, I have mio ramdisk/hd, I have avgide, rtime8, avgexpress, spartax. It all works. It all passes, no issues.
switching in and out of cartridges is no issue. I don't think people quite get how flexible the Orion/OSS cartridge system is, so I took the second avg out and put the real express in second stack... it all works..
Sparta Dos X in slot 1 with AVGSIDE on top
rtime8 in slot 2 with Express! on top and ANOTHER avg cart on top of that...
It all works!
The Atari was designed with hot swapping in mind, so a clean switch pcb just makes it easier and more successful to do this sort of thing.
I will post a screen shot of changed stack, and car above express activated. the cart scheme is genius in that oss carts designed to work together can share their library. but if you select a cart not of oss design plugged on top, they remove themselves and their libraries as long as the bad guy is active. If you leave the cart that doesn't get along, the oss carts come back on to the bus either by themselves or using a software initialization.
Most folks never enjoyed this, I do know fte was hoping to bring out a computer with such abilities built in...It did work, but sadly real life happened and crushed the roll out.
Edited by _The Doctor__, Thu Feb 28, 2019 11:21 AM.