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MSX Turbo-R Roms Section.
MSX turboR
Only released in Japan
Processor: R800 and Zilog Z80A compatible
R800 running at 7.16 MHz (instructions use about 4x less clock ticks than the Z80, so often quoted as 28.6 MHz when comparing with the Z80)
Zilog Z80A compatible (embedded in the T9769C MSX-Engine) running at 3.58 MHz for backward compatibility
ROM: 96 kB
BIOS + Extended BIOS (48 kB)
MSX BASIC V4.0 (16 kB)
DiskROM (16 kB)
Kun-BASIC (16 kB)
Kanji ROM (256 kB)
Firmware (4 MB)
RAM: 256 kB (FS-A1ST) or 512 kB (FS-A1GT)
Memory mapped (4 MB/slot max)
Additionally 16 kB (FS-A1ST) or 32 kB (FS-A1GT) of SRAM (battery-powered)
Video Display Processor: Yamaha V9958 (aka MSX-Video) so the same capabilities as MSX2+
Sound chip: Yamaha YM2149 (PSG)
Sound chip: Yamaha YM2413 (OPLL) (MSX-Music)
Sound chip: PCM
8-bit single channel (no DMA), 16 kHz max using BIOS routines.
Microphone built-in
Sound chip: MIDI in/out (FS-A1GT only)
Clock chip
3.5 in (89 mm) Floppy disk drive
