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- 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
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- 3C4h index 15h (R/W):
- bit 0-7 Read Bank in units of 32Kbytes
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- 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
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- 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
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