Sierra superVGAs: SC15064 Falcon/64 3C4h index 7h bit 5-7 (R) Chip id. 4: 15064 3C4h index 11h bit 5 Clear to enable extensions 6-7 Set to 0 to enable access >1Mb, 3 to disable banking? Note: When unlocking read this register, write it back twice and write bit 5 back as 0. 3C4h index 13h (R/W): bit 0-7 Linear Frame Buffer Address in units of 1Mb. 3C4h index 14h (R/W): bit 4-5 CRTC Offset bits 8-9. Bits 0-7 are in 3d4h index 13h 3C4h index 15h (R/W): bit 0-7 Read Bank in units of 32Kbytes 3CDh (R/W): bit 0-7 Write Bank in units of 32Kbytes 3CEh index 05h (R/W): bit 7 Set to enable the Linear Frame Buffer Note: Bits 0-6 are standard VGA. 3CEh index 0Ch (R/W): bit 0-1 Set to 3 to enable 16bits/pixel? 3d4h index 1Eh (R/W): bit 0-3 Display Start Address bits 16-19. Bits 0-15 are in 3d4h index 0Ch,0Dh Video modes: 58h G 800 600 16color 59h G 1600 1200 16color 5Ah G 1280 1024 16color 5Bh G 1280 1024 256color 5Ch G 800 600 256color 5Dh G 1024 768 16color 5Eh G 1024 768 256color 5Fh G 640 480 256color 60h G 1600 1280 256color 69h G 640 480 16Mcolor 6Eh G 640 480 32Kcolor 6Fh G 800 600 32Kcolor 70h G 800 600 16Mcolor 71h G 1024 768 32Kcolor 73h G 1024 768 16Mcolor 75h G 1280 1024 32Kcolor