This information was extracted from the V.Smile Motion schematics which was (accidentally?) published by the FCC with the certification for the console.
Local copy of the document: vsmile-motion-schematics.pdf
The use of Port A changes a bit on various generations of machines
| Console | IOA14 | IOA15 |
|---|---|---|
| V.Smile | 0 | x |
| V.Smile Pocket | 0 | x |
| V.Smile Motion | 1 | 0 |
| Cyber Pocket | 1 | 1 |
Note: these can be used with the “External Memory Control” register, in that case they are controlled by the CPU core automatically depending on the address being accessed.
For example in external address mode 2 or 3 (4 ROMs mode):
| Pin | Address range |
|---|---|
| IOB0 | 100000-1FFFFF |
| IOB1 | 200000-2FFFFF |
| IOB2 | 300000-3FFFFF |
| ROMCSB | 008000-0FFFFF |
In external address mode 0: ROMCSB is the only one used for the whole range (note: ROMCSB is not wired to anything, so in this area no ROM will be enabled)
In external mode 1 (2 ROMs mode):
| Pin | Address range |
|---|---|
| IOB1 | 200000-3FFFFF |
| ROMCSB | 008000-1FFFFF |
Additionally, the end of the address space can also receive RAM (in the cartridge), this is configured separately and different RAM sizes are possible.
| Language | IOC3 | IOC2 | IOC1 | IOC0 | Value |
|---|---|---|---|---|---|
| No screen (v1.02+) | 0 | 0 | 0 | 0 | 0 |
| No screen (v1.02+) | 0 | 0 | 0 | 1 | 1 |
| Italian (v1.03), UK English variant (without subtitle) (v1.02) | 0 | 0 | 1 | 0 | 2 |
| US English variant (without subtitle) (v1.02+) | 0 | 0 | 1 | 1 | 3 |
| US English variant (with alternate subtitle “TV Learning System”) (v1.02+) | 0 | 1 | 0 | 0 | 4 |
| US English audio variant without “V.Smile!” speech sample (v1.02+) | 0 | 1 | 0 | 1 | 5 |
| UK English audio variant without “V.Smile!” speech sample (v1.02+) | 0 | 1 | 1 | 0 | 6 |
| Chinese | 0 | 1 | 1 | 1 | 7 |
| Portuguese | 1 | 0 | 0 | 0 | 8 |
| Dutch? (same data as US English) | 1 | 0 | 0 | 1 | 9 |
| UK English variant (without subtitle) (v1.03), Italian (v1.00, v1.02) | 1 | 0 | 1 | 0 | A |
| German | 1 | 0 | 1 | 1 | B |
| Spanish | 1 | 1 | 0 | 0 | C |
| French | 1 | 1 | 0 | 1 | D |
| UK English (with standard subtitle) | 1 | 1 | 1 | 0 | E |
| US English (with standard subtitle) | 1 | 1 | 1 | 1 | F |
The standard English subtitle is “Learning System” in v1.02+ and “TV Learning System” in v1.00. Values below 7 have the same behavior as US English in v1.00, except that values below 6 boots to a blinking blue VTech logo in white when no cartridge is inserted.
Note that Italian and the subtitle-less variant of UK English swap places in v1.03.
IOC4: if 1: show logo animation at boot
IOC5: currently unknown, maybe LCD/TV detection? Unused in V.Smile motion schematics, test point in older consoles?