Guru
Joined: 11/12/2012
Location: United KingdomPosts: 11636
| Posted: 07:52pm 16 Jan 2024 |
V5.08.00RC4
https://geoffg.net/Downloads/picomite/PicoMite_Beta.zip
Fixes the couple of bugs found by Frank
Adds a new game orientated feature to the VGA version
FRAMEBUFFER OFFSET x, y [,b]
This command changes the VGA output so it offsets reading the framebuffer vertically by subtracting y from the line and each line horizontally by adding x. The optional parameter B waits for frame blanking before making the change.
Note: this command does not change the contents of the framebuffer, just the way it is read out of the buffer.
The command is only available when OPTION CPUSPEED 252000 is set.
FRAMEBUFFER OFFSET 16,16 will move the image 16 lines down the screen and 16 pixels to the right with lines at the bottom wrapping to the top and pixels at the right wrapping to the left.
The shifts in the y direction can be any number between 0 and MM.VRES-1
The shift in the x direction must be between 0 and MM.HRES - xmod and be a multiple of xmod which is 16 for mode 1 and 2 for mode 2
Example code as shown in the Demo
MODE 2
Load image "b:/julia2"
Do
For y=0 To 238 Step 2
x=y*4/3
If x Mod 2 Then Inc x
FRAMEBUFFER offset x,y,b
Next
Loop
Load image "b:/julia2"
Do
For y=0 To 238 Step 2
x=y*4/3
If x Mod 2 Then Inc x
FRAMEBUFFER offset x,y,b
Next
Loop