Transtape Clone (MX4)

[skywalky]

I'm assembling the boards. Next week I can ship the Transtapes.

[mahlemiut]

Is there any emulator that supports " Transtape " rom ?

I'm working on Transtape support for MAME, but not quite getting the mapping exactly right.
Trying to determine which bits mean what in its I/O ports (FBF0 and FBFF) is not easy, although I'm pretty confident that bit 1 of FBF0 enables/disables the ROM.
If anyone does know, please do let me know.

[Gryzor]

Nice news, thanks for the update @skywalky !

[skywalky]

I'm working on Transtape support for MAME, but not quite getting the mapping exactly right.
Trying to determine which bits mean what in its I/O ports (FBF0 and FBFF) is not easy, although I'm pretty confident that bit 1 of FBF0 enables/disables the ROM.
If anyone does know, please do let me know.

Can I help you with the transtape in a real CPC?

[mahlemiut]

Can I help you with the transtape in a real CPC?

Actually, I wonder if the ROM is mappable without pressing either button.  An OUT &FBF0,2 might make it appear at &0000...

[arnoldemu]

I updated the wiki with what I could find from the schematics.

Interesting:
- detects lower/upper rom state based on a read in the lower rom/upper rom area (monitors ROMEN).
- an opcode read of a memory address (well a partially decoded memory address) causes rom and ram to be disabled (so it can return to the stopped program)
- I added the exact decoding of the ram and ports.

Some of these devices like this involve monitoring memory accesses etc...