PRIMUS P2000
P2000 2MB max 1280x1024/256c, 800x600/32k.
The P2000 is an accelerator card.
3CEh index 13h (R/W):
bit 6 If set interlaced display is enabled, and the display offset
(CRTC index 13h + 3CEh index 21h bit 5) is divided by 2.
3CEh index 1Dh (R/W):
bit 0-1 Monitor type. 0=35KHz, 1=48KHz, 2=56KHz, 3=65KHz.
3CEh index 1Eh W(R/W):
3CEh index 21h (R/W):
bit 0-2 Display start address bit 16-18.
5 Bit 8 of the Display Offset (3d4h index 13h),
3CEh index 30h 3(R/W): Source address
bit 0-23 Pixel address of the source area. Calculated as (row * pixels per
scanline) + column. For HiColor modes this value should be
doubled. Used or BitBLT operations.
3CEh index 33h W(R/W): Width of Blit Area
bit 0-15 Width of the Blit Area in pixels.
3CEh index 35h W(R/W): Height of Blit Area
bit 0-13 Height of the Blit Area in pixels.
14 Set to step backwards in the destination.
15 Set to step backwards in the source
3CEh index 37h 3(R/W): Destination Address
bit 0-23 Pixel address of the destination area. Calculated as (row * pixels
per scanline) + column. For HiColor modes this value should be
doubled.
3CEh index 3Ah W(R/W):
bit 0-15 Width of the destination area in pixels
3CEh index 3Dh (R/W): Status/Command register
bit 0 (R): Set if busy with op.
0-7 (W): Command.
00h = NO op.
05h = Copy
07h = BitBlt
19h = Fill rect
25h = BitBLT Invert.
29h = FillRect Invert.
3CEh index 3Eh (R/W): Fill color
bit 0-7 Fill color (rect).
3CEh index 3Fh (R/W):
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.
Accelerated commands are set up as follows:
Set up the registers with the parameters (areas, size and color)
Wait for bit 0 of 3CEh index 3Dh to clear.
Write command to 3CEh index 3Dh.
Wait for bit 0 of 3CEh index 3Dh to clear.
It is advisable to finish with a NOP (00h) command to terminate the
coprocessor. The commands can be modified via the fields in 3CEh index 3
(MOV, AND, OR, XOR).
ID Primus P2000:
if testinx2($3CE,$3D,$3F) and tstrg($3D6,$1F) and tstrg($3D7,$1F) then
_p2000
Video Modes:
1Eh T 80 30 16 (8x16)
1Fh T 80 43 16 (8x11)
20h T 80 60 16 (8x8)
21h T 100 75 16 (8x8)
24h T 132 25 16 (8x14)
25h T 132 30 16 (8x16)
26h T 132 43 16 (8x11)
27h T 132 60 16 (8x8)
28h G 512 512 16 PL4
29h G 512 512 256 P8
2Ah G 800 600 16 PL4
2Bh G 800 600 256 P8
2Ch G 640 400 256 P8
2Dh G 640 480 256 P8
2Eh G 768 1024 16 PL4
2Fh G 768 1024 256 P8
30h G 1024 768 16 PL4
31h G 1024 768 256 P8
32h G 1024 1024 16 PL4
33h G 1024 1024 256 P8
34h G 1152 900 16 PL4
35h G 1152 900 256 P8
36h G 1280 1024 16 PL4
37h G 1280 1024 256 P8
41h G 512 512 32k P15
42h G 640 350 32k P15
43h G 640 400 32k P15
44h G 640 480 32k P15
45h G 800 600 32k P15
4Ah G 640 480 16m P24