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- Realtek RT 3106 - Upto 1 Mbyte.
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- 3CEh index Fh (R/W): Extended Function.
- bit 2 Single/Dual bank.
- If set 3D6h is the read bank number and 3D7h is the write bank number.
- if clear 3D7h is used for both read and write operations.
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- 3d4h index 1Ah:
- bit 6-7 Chip version. 0=Version 0, 1= Version 1, 2=Version 2, 3=Version x
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- 3d4h index 1Eh:
- bit 0-1 Video Ram. If Chip version =0: 0=256k, 1=512k, 2=768k and 3=1MB
- If chip version >0: 0=256k, 1=512k, 2=1MB and 3=2MB.
- 2
- 4-7
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- 3D4h index 1Fh (R/W):
- bit 0-1 Emulation mode: 0=VGA, 1=EGA, 2=CGA, 3=MDA
- 2-5
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- 3D6h (R/W): Bank register
- bit 0-3 64k Bank register (Read bank if 3CEh index Fh bit 2 set)
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- 3D7h (R/W): Bank Register
- bit 0-3 64k bank number. (Write/single bank)
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- Test for Realtek Chip:
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- if testinx2(crtc,$1f,$3f) and tstrg($3d6,$f) and tstrg($3d7,$f) then
- Realtek!!!.
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- Video modes:
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- 18h T 80 30 16
- 19h T 80 43 16
- 1Ah T 80 60 16
- 1Bh T 132 25 16
- 1Ch T 132 30 16
- 1Dh T 132 43 16
- 1Eh T 132 60 16
- 1Fh G 800 600 16 planar
- 20h G 960 720 16 planar
- 21h G 1024 768 16 planar
- 22h G 768 1024 16 planar
- 23h G 1024 768 4 planar
- 24h G 512 512 256 packed
- 25h G 640 400 256 packed
- 26h G 640 480 256 packed
- 27h G 800 600 256 packed
- 28h G 1024 768 256 packed
- 29h G 1024 1024 256 packed
- 2Ah G 1280 1024 16 planar
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