Difference between revisions of "Express"
m (Add a link to experimental kernels with XZ "support")
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Revision as of 11:59, 15 December 2008
Thanks to NetBSDs GR2 driver we have out that HQ2.1 is a kind of successor of the HQ2 found in the Indigo(IP12), and at least partialy compatible. Version information can be read in the same way and tests have shown that:
- Drawing colored rectangles work
- Drawing characters work
- Copying rectangles "work" but the board gets stuck
These are the possible locations where the XZ board can be found.
TBD: Is it here in the same way as for Newport that Express does not give any GIO Product ID? How to identify the board on the bus?
Known commands locations into the engine FIFO are:
#define GR2_FIFO_INIT 0x191 #define GR2_FIFO_COLOR 0x192 #define GR2_FIFO_FINISH 0x193 #define GR2_FIFO_PNT2I 0x194 #define GR2_FIFO_RECTI2D 0x195 #define GR2_FIFO_CMOV2I 0x196 #define GR2_FIFO_LINE2I 0x197 #define GR2_FIFO_DRAWCHAR 0x198 #define GR2_FIFO_RECTCOPY 0x199 #define GR2_FIFO_DATA 0x1df
Most commands seems to work like this:
"LOCATION"=param0 DATA=param1 DATA=param2 .... DATA=paramX
Currently know operations that work are the following:
rev0=ex_regs->bdversion.rd0 & GR2_REVISION_RD0_VERSION_MASK; rev1=ex_regs->bdversion.rd1 & 0x03; hqv=(ex_regs->hq.version & HQ2_VERSION_MASK) >> HQ2_VERSION_SHIFT;
All drawing operations need a color that it should use:
Drawing a rectangle
First you must set the color and then:
[GR2_FIFO_RECTI2D]=x1; [GR2_FIFO_DATA]=y1; [GR2_FIFO_DATA]=x2; [GR2_FIFO_DATA]=y2;
Y needs to be flipped as 0,0 is lower left corner.
Set color, then:
First move character draw location to x,y
Then set width and height of character:
[GR2_FIFO_DATA]=2; [GR2_FIFO_DATA]=0; [GR2_FIFO_DATA]=0; [GR2_FIFO_DATA]=0; [GR2_FIFO_DATA]=0; [GR2_FIFO_DATA]=0;
Then plot the character, bottom first:
loop for font height: [GR2_FIFO_DATA]=pattern
Be sure to padd up to 18, probably the max font height.
This is giving a headache right now as all of the above seems to work just fine.
Other operations will be added when we figure them out.
No patches just yet. Kernel with sort-of-maybe-working-console can be found from time to time at onion's kernels page.