Trivia: when the DRAM shortage was ending during 1989, 1Mbit DRAM prices fell first. This is partly because Toshiba etc. started converting fabs from 256Kbit to 1Mbit DRAM back in mid-1987 but the demand for 256Kbit DRAM was still increasing (Samsung was able to increase their market share in DRAM due to this). Back then, 1Mbit DRAM yields was much lower than in 1989.