SIO/2 Board for RC2014 backplane
- 74ALS688 addr comparator for address decoding
- Block of 8 addresses assigned
- Arbitrary 8 address boundry
- SIO at Addr 0 does not conflict with IDE at address 10H (Aka Grant Searle design)
Z80 MiniTube is a Z80 secondary CPU card for BBC micro machines. It is a minimalist version of the Tube with it own Tube code. The Z80 version has up-to 512K RAM and can run any CP/M program version 2.X and 3.X.
BIOS, BDOS and CCP can be loaded from ROM or disks. It support the same disk systems that the BBC micro.
The graphic library GSX has been added for programs that support this.