Differences

This shows you the differences between two versions of the page.

--- io [2022/11/11 10:52] – [Configuration] pulkomandy
+++ io [2025/02/23 15:23] (current) – [Configuration] Region codes simer
@@ Line 45: / Line 45: @@
   * IOB2: Set to 0 to enable internal ROM
+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.
 ===== Power control =====
@@ Line 58: / Line 77: @@
 ^Language^IOC3^IOC2^IOC1^IOC0^Value^
-|Chinese | 0  | 1  | 1  | 1  |  7  |
+|No screen (v1.02+)                                                          | 0 | 0 | 0 | 0 |  0  |
-|Polish  | 1  | 0  | 0  | 0  |  8  |
+|No screen (v1.02+)                                                          | 0 | 0 | 0 | 1 |  1  |
-|Dutch   | 1  | 0  | 0  | 1  |  9  |
+|Italian (v1.03), UK English variant (without subtitle) (v1.02)              | 0 | 0 | 1 | 0 |  2  |
-|Italian | 1  | 0  | 1  | 0  |  A  |
+|US English variant (without subtitle) (v1.02+)                              | 0 | 0 | 1 | 1 |  3  |
-|German  | 1  | 0  | 1  | 1  |  B  |
+|US English variant (with alternate subtitle "TV Learning System") (v1.02+)  | 0 | 1 | 0 | 0 |  4  |
-|Spanish | 1  | 1  | 0  | 0  |  C  |
+|US English audio variant without "V.Smile!" speech sample (v1.02+)          | 0 | 1 | 0 | 1 |  5  |
-|French  | 1  | 1  | 0  | 1  |  D  |
+|UK English audio variant without "V.Smile!" speech sample (v1.02+)          | 0 | 1 | 1 | 0 |  6  |
-|UK English| 1| 1  | 1  | 0  |  E  |
+|Chinese                                                                     | 0 | 1 | 1 | 1 |  7  |
-|US English| 1| 1  | 1  | 1  |  F  |
+|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.
-Values under 7 are filtered out by the console BIOS in some cases and replaced by either UK or US english.
+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?
+IOC5: currently unknown, maybe LCD/TV detection? Unused in V.Smile motion schematics, test point in older consoles?
 ===== Power control =====
   * IOC6: audio output enable
-  * IOC7: Power control
+  * IOC7: Power control (on V.Smile motion: microphone power control and wireless controller control)
 ===== Controllers =====