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Shareware Overload Trio 2
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PRIMUS.TXT
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1993-01-22
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PRIMUS P2000
P2000 2MB max 1280x1024/256c, 800x600/32k.
The P2000 is an accelerator card.
3CEh index 13h (R/W):
bit 6 If set 3CEh index 21h bit 5 is used as bit 8 of the Display Offset
(3d4h index 13h) and the final display address is devided by 2.
3CEh index 21h (R/W):
bit 0-2 Display start address bit 16-18.
5 Bit 8 of the Display Offset (3d4h index 13h),
if 3CEh index 13h bit 6 is set.
3CEh index 30h (R/W):
3CEh index 33h (R/W): Width lo byte
bit 0-7 low byte of object/area width in pixels.
3CEh index 34h (R/W): Width hi byte
bit 0-7 high byte of object/area width in pixels.
3CEh index 35h (R/W): Height lo byte
bit 0-7 low byte of object/area height in pixels.
3CEh index 36h (R/W): Height hi byte
bit 0-7 high byte of object/area height in pixels.
3CEh index 37h (R/W): Start address lo byte
bit 0-7 low byte of the pixel address of the object/area
3CEh index 38h (R/W): Start address mid byte
bit 0-7 mid. byte of the pixel address of the object/area
3CEh index 39h (R/W): Start address hi byte
bit 0-7 high byte of the pixel address of the object/area
3CEh index 3Dh (R/W): Status/Command register
bit 0 (R): Set if busy with op.
bit 0-7 (W): Command.
00h = NO op.
07h = BitBlt
19h = Fill rect
3CEh index 3Eh (R/W): Fill color
bit 0-7 Fill color (rect).
3D6h (R/W): Write bank
bit 0-7 Write bank no. in 64kb units.
3D7h (R/W): Read bank
bit 0-7 Read bank no. in 64kb units.