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- Realtek RT 3106 - Upto 1 Mbyte.
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- 3CEh index 0Ah (R/W):
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- 3CEh index 0Bh (R/W):
- bit 0-1 Timing ?
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- 3CEh index Ch (R/W):
- bit 2 Always set ??
- 4 If set doubles the number of pixels in a "character clock"
- Pixels per character clock:
- clear set
- 16color modes 8 16
- 256color modes 4 8
- 5 Set if >1024 pixels in a scanline ??
- 6 ??
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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 19h (R/W):
- bit 0 Interlace enabled if set. If set the display offset in 3d4h index 13h
- is the number for two scanlines, rather than one.
- 1 Enable memory beyond 64K (256colors)
- 4 Display Start Address bit 16.
- 5 Enables display to cross 256K boundary if set
- 6 Display Start Address bit 17.
- 7 Enables display to cross 512K boundary if set
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- 3d4h index 1Ah:
- bit 6-7 Chip version.
- 0 = Version 0 (RTG3103 ?)
- 1 = Version 1 (RTG31030/RTG3105 ?)
- 2 = Version 2 (RTG3106)
- 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(base,$1F,$3F) and tstrg($3D6,$F) and tstrg($3D7,$F) then
- case rdinx(base,$1A) shr 6 of
- 0:Realtek RT3103
- 1:Realtek RT3105
- 2:Realtek RT3106
- end;
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- Video modes:
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- 18h T 80 30 16 (9x16)
- 19h T 80 43 16 (9x11)
- 1Ah T 80 60 16 (9x8)
- 1Bh T 132 25 16 (9x14)
- 1Ch T 132 30 16 (9x16)
- 1Dh T 132 43 16 (9x11)
- 1Eh T 132 60 16 (9x8)
- 1Fh G 800 600 16 PL4
- 20h G 960 720 16 PL4
- 21h G 1024 768 16 PL4
- 22h G 768 1024 16 PL4
- 23h G 1024 768 4 PL2
- 24h G 512 512 256 P8
- 25h G 640 400 256 P8
- 26h G 640 480 256 P8
- 27h G 800 600 256 P8
- 28h G 1024 768 256 P8
- 29h G 1024 1024 256 P8
- 2Ah G 1280 1024 16 PL4
- 38h G 320 200 64K P16
- 39h G 512 512 64K P16
- 3Ah G 640 400 64K P16
- 3Bh G 640 480 64K P16
- 3Ch G 800 600 64K P16
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- ----------105F00------------------
- INT 10 - VIDEO - Realtek VGA - RETURN CHIP VERSION
- AX = 5F00h
- Return: AH = 00h if successful
- AL = Chip version
- 00h RTG3103 ?
- 01h RTG31030/RTG3105
- 02h RTG3106 ?
- 3Fh Not a Realtek chip
- ----------105F01------------------
- INT 10 - VIDEO - Realtek VGA - GET RTVGA BIOS STRING
- AX = 5F01h
- ES:DI -> buffer to receive BIOS ID string
- Return: AL = 00h if successful
- ES:DI -> buffer with zero terminated BIOS ID string
- ----------105F02------------------
- INT 10 - VIDEO - Realtek VGA - GET VIDEO MEMORY SIZE
- AX = 5F02h
- Return: AH = 00h if successful
- AL = Memory size. 0: 256K, 1: 512K, 2: 768K, 3: 1024K
- ----------105F03------------------
- INT 10 - VIDEO - Realtek VGA - SET ??
- AX = 5F03h
- BL = 0-3 ??
- Return: AH = 00h if successful
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