Add support for TRS-80 MC-10 / Matra Alice

[stefanschramm]

Equipment donations are welcome! 🙂

[stefanschramm]

-> Compare to TRS-80 CoCo

[hippietrail]

-> Compare to TRS-80 CoCo

I was under the impression it was based on the TRS-80 MC-10 and that that platform is very different from the CoCo other than also using the 6847?

[stefanschramm]

It's true, Alice is more similar to MC-10. But it seems like the tape interface/protocol (of both) is completely identical to CoCo.

In MAME I'm able to load the CoCo example https://github.com/stefanschramm/retroload/blob/main/retroload-lib/examples/formats/trs80coco/rl.bin.asm on Alice when using 0x4800 as load/entry address. The program itself seems to run, but the call to CHROUT (jsr [$a002]) does not work. Could not yet find any documentation about ROM routines for MC-10 / Alice.