My name is Tommi Lempinen, and I own the copyright on the following images:

http://oms.wmhost.com/misc/sid_fet_workings.gif
http://oms.wmhost.com/misc/sid_adsr_tables.gif
http://oms.wmhost.com/misc/control.gif
http://oms.wmhost.com/misc/sid_filter_bit_control.gif
http://oms.wmhost.com/misc/sid_filter_bit_0_set.gif
http://oms.wmhost.com/misc/sid_filter_bit_1_set.gif
http://oms.wmhost.com/misc/sid_filter_bit_0_hold.gif
http://oms.wmhost.com/misc/sid_filter_bit_1_hold.gif
http://oms.wmhost.com/misc/sid_opamp.gif
http://oms.wmhost.com/misc/sid_cutoff-resistor-fet.gif
http://oms.wmhost.com/misc/sid_filter_plan.gif
http://oms.wmhost.com/misc/cutoff_bits_12_and_11.gif
http://oms.wmhost.com/misc/sid_test_2.jpg
http://oms.wmhost.com/misc/sid_test_3.jpg
http://oms.wmhost.com/misc/sid_cleaning.jpg
http://oms.wmhost.com/misc/sid_test_4.jpg
http://oms.wmhost.com/misc/sid_test_5.jpg
http://oms.wmhost.com/misc/sid_cleaning_2.jpg
http://oms.wmhost.com/misc/MOS_6581R3_analog_network.gif
http://oms.wmhost.com/misc/MOS_6581R2_full_small.png
http://oms.wmhost.com/misc/MOS_6581R3_full_small.png
http://oms.wmhost.com/misc/MOS_6581R4_full_small.png
http://oms.wmhost.com/misc/MOS_6581R2_full.png
http://oms.wmhost.com/misc/MOS_6581R3_full.png
http://oms.wmhost.com/misc/MOS_6581R4_full.png
http://oms.wmhost.com/misc/MOS_8580_R5_filter.png
http://oms.wmhost.com/misc/MOS_8580_R5_filter_add.png
http://oms.wmhost.com/misc/MOS_8580_R5_waveform.png
http://oms.wmhost.com/misc/MOS_8580_R5_envelope.png
http://oms.wmhost.com/misc/8580_progress.png
http://oms.wmhost.com/misc/MOS_8580R5_full.png
http://oms.wmhost.com/misc/MOS_8580R5_full_small.png
http://oms.wmhost.com/misc/6581R3_rendtest.png
http://oms.wmhost.com/misc/MOS_6581R2_layer_bitmaps.zip
http://oms.wmhost.com/misc/MOS_6581R3_layer_bitmaps.zip
http://oms.wmhost.com/misc/MOS_6581R4_layer_bitmaps.zip
http://oms.wmhost.com/misc/MOS_8580R5_layer_bitmaps.zip
http://oms.wmhost.com/misc/r3_address.png
http://oms.wmhost.com/misc/r3_controlbus.png
http://oms.wmhost.com/misc/r3_databus.png
http://oms.wmhost.com/misc/r3_envelope.png
http://oms.wmhost.com/misc/r3_filter.png
http://oms.wmhost.com/misc/r3_filter_no-conns_removed.png
http://oms.wmhost.com/misc/r3_paddle.png
http://oms.wmhost.com/misc/r3_waveform.png
http://oms.wmhost.com/misc/das_SID.jpg
http://oms.wmhost.com/misc/das_SID2.jpg
http://oms.wmhost.com/misc/MOS_6581R4_signals.png
http://oms.wmhost.com/misc/regions.gif
http://oms.wmhost.com/misc/XmikeX_6581_2783/*
http://oms.wmhost.com/misc/Jope_6581_2383/*
http://oms.wmhost.com/misc/Trurl_6581_2083/*
http://oms.wmhost.com/misc/Mr_Ammo_6581_2282/*
http://oms.wmhost.com/misc/6581_filter_output.txt
http://oms.wmhost.com/misc/6581_filter_output_alt.txt
http://oms.wmhost.com/misc/6581_freq_bits.txt
http://oms.wmhost.com/misc/6581_wavegen.txt
http://oms.wmhost.com/misc/6581_pwm_bits.txt
http://oms.wmhost.com/misc/6581_wave_select.txt
http://oms.wmhost.com/misc/6581_wave_select_alt.txt
http://oms.wmhost.com/misc/6581_saw_tri_ringmod.txt
http://oms.wmhost.com/misc/6581_dac_control.txt
http://oms.wmhost.com/misc/VIC-II_internal_interference.gif
http://oms.wmhost.com/misc/fake_sid_1.jpg
http://oms.wmhost.com/misc/fake_sid_2.jpg
http://oms.wmhost.com/misc/MOS_6526A_CIA.jpg
http://oms.wmhost.com/misc/MOS_8520_CIA.jpg
http://oms.wmhost.com/misc/C64C_bot.jpg
http://oms.wmhost.com/misc/C64C_top.jpg
http://oms.wmhost.com/misc/C64C_xray.jpg

The preceding images are considered to be released under the CC-BY-SA license.

I (JM) have the full collection privately mirrored. For now I'm only posting the high res chip maps. If his site goes down ping me to post a public mirror