Data for MSX description from Main-ROM Bios
Data for MSX description from Main-ROM Bios
| Address | Name | Length | Description |
| 0004h | CGTABL | 2 | MSX Character Set address in Main-ROM. |
| 0006h | VDP.DR | 1 | Port used to read data from the VDP. |
| 0007h | VDP.DW | 1 | Port used to write data to the VDP. |
| 002Bh | BASRVN | 2 | First byte indicates character set localization, date format and default interrupt frequency (VSYNC).
7 6 5 4 3 2 1 0
| | | | +-+-+-+-- Character set
| | | | 0 = Japanese, 1 = Other
| +-+-+---------- Date format
| 0 = Y-M-D, 1 = M-D-Y, 2 = D-M-Y
+---------------- Default interrupt frequency (VSYNC)
0 = 60Hz, 1 = 50Hz
Second byte indicates Basic ROM Keyboard localization and Basic version.
7 6 5 4 3 2 1 0
| | | | +-+-+-+-- Keyboard type
| | | | 0 = Japanese (Korean MSXs use also 0), 1 = English
| | | | 2 = French (AZERTY), 3 = English UK, 4 = German (DIN)
| | | | 5 = ?, 6 = Spanish, 9 = Danish / Norwegian
+-+-+-+---------- Basic version
0 = Japanese (Korean MSXs use also 0), 1 = International
|
| 002Dh | MSXVER | 1 | MSX Version Number.
0 = MSX 1 1 = MSX 2 2 = MSX 2+ 3 = MSX Turbo R |
| 002Eh | 1 | If bit 0 = 1 then internal MIDI is present (Turbo R only !!!) | |
| 002Fh | 1 | Reserved |