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File:Model1GenesisVDP.jpg The VDP inside an early Model 1 North American Genesis.(1,924 × 1,620 (458 KB)) - 11:44, 16 March 2015
File:Model1GenesisVRAM.jpg The VRAM on a Model 1 Sega Mega Drive.(2,051 × 2,051 (937 KB)) - 11:44, 16 March 2015
File:Model1MegaDriveSoundCPU.jpg The [[Zilog Z80|Z80]] and Sound RAM in a Model 1 Sega Mega Drive.(3,208 × 2,324 (1,013 KB)) - 11:44, 16 March 2015
File:Model1MegaDriveYM2612.jpg The [[YM2612]] chip in a Model 1 Sega Mega Drive. The heat sink for the voltage regulators is visible, as we(2,503 × 2,503 (1.41 MB)) - 23:06, 14 August 2015- ...le of the [[Mega Drive]]'s sound capability, recorded from Streets of Rage 1.83 bytes (14 words) - 11:29, 16 March 2015
File:315-5309 pinout.png A pinout diagram of the IO chip found on early Model 1 [[Mega Drive]]s. It handles the version register, as well as IO ports.(1,936 × 1,472 (82 KB)) - 22:18, 2 July 2015
File:315-5309-MD1VA3.jpg A picture of the [[315-5309]] IO controller on a VA3 Model 1. Part of the low RAM chip can be seen on the bottom, with some protection f(1,224 × 1,200 (476 KB)) - 22:18, 2 July 2015
File:MD1VRAM.jpg The two [[VRAM]] chips on a Model 1 [[Mega Drive|Mega Drive.]](2,204 × 1,388 (388 KB)) - 23:04, 14 August 2015
File:1kSquareWave.ogg An example of a 1 kHz square wave.(146 KB) - 23:03, 14 August 2015
