Differences

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--- io [2021/08/26 19:16] – created pulkomandy
+++ io [2022/11/11 15:33] (current) – [ROM and cartridge] pulkomandy
@@ Line 1: / Line 1: @@
+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: {{ ::fcc:vsmile-motion-schematics.pdf |}}
 ====== Port A ======
-===== V.Link SPI =====
+The use of Port A changes a bit on various generations of machines
+===== V.Smile Motion =====
+==== V.Link SPI ====
   * IOA0: SPI clock
@@ Line 9: / Line 17: @@
   * IOA4: Chip select
-===== Console type =====
+==== Console type ====
 ^ Console        ^ IOA14 ^ IOA15 ^
@@ Line 17: / Line 25: @@
 | Cyber Pocket   | 1     | 1     |
-===== Other =====
+==== Other ====
+  * IOA11: Only a pull down resitor?
+  * IOA12: Only a test point on the motherboard?
+===== V.Smile Pocket =====
+  * IOA0-IOA11: LCD STN interface
+  * IOA13: LCD backlight control
+  * IOA14: Read as 0 according to notes in V.Smile Motion schematics
+====== Port B ======
+===== ROM and cartridge =====
+  * IOB0: extra address bit for the cartridge port, access second half of ROM
+  * IOB1: Set to 0 to enable cartridge ROM
+  * 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 =====
+  * IOB3: Labelled "RESTART", not used?
+  * IOB4: "A/D", related to the ADC?
+  * IOB5: Voltage detect (ADC measurement of battery level or power supply)
+  * IOB6: Pulled to ground by the ON button
+  * IOB7: Pulled to ground by the OFF button
+====== Port C ======
+===== Configuration =====
+^Language^IOC3^IOC2^IOC1^IOC0^Value^
+|Chinese | 0  | 1  | 1  | 1  |  7  |
+|Polish? Portuguese?  | 1  | 0  | 0  | 0  |  8  |
+|Dutch   | 1  | 0  | 0  | 1  |  9  |
+|Italian | 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| 1| 1  | 1  | 0  |  E  |
+|US English| 1| 1  | 1  | 1  |  F  |
+Values under 7 are filtered out by the console BIOS in some cases and replaced by either UK or US english.
+:?: The FCC schematics for the V.Smile motion says Italian should be 2 (0010), is it a difference for the new console or a mistake in the schematics?
+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?
+===== Power control =====
-  * IOA11: ?
+  * IOC6: audio output enable
-  * IOA12: ?
+  * IOC7: Power control (on V.Smile motion: microphone power control and wireless controller control)
+===== Controllers =====
+  * IOC8: Controller A clear to send (to controller)
+  * IOC9: Controller B clear to send (to controller)
+  * IOC10: Controller A request to send (from controller)
+  * IOC12: Controller B request to send (from controller)
+  * IOC13: UART Rx (from controller)
+  * IOC14: UART Tx (to controller)
+  * IOC15: Controller power?