SRAM is sometimes mapped not just to 70:0000-7fff but also to 70:8000-ffff if ROM size permits it (i.e. the ROM is small enough to avoid overlap). Map SRAM to 8000-ffff if the ROM mask denotes a ROM <= 16 MBits.
SRAM is sometimes mapped not just to 70:0000-7fff but also to 70:8000-ffff if ROM size permits it (i.e. the ROM is small enough to avoid overlap). Map SRAM to 8000-ffff if the ROM mask denotes a ROM <= 16 MBits.