08-07-2017, 01:41 AM
Hi Boriel, thanks for the help first of all. It's very strange what's going on. This is what I originally had in my program. For the UDGs
I put this in at the start of my BASIC listing
This causes the Speccy show me a black screen when I run it or It crashes, If I change the B to 32 and only have 4 udgs everything is fine! I tried the example you mention from SNAKE.BAS and something else strange happens. Line goes like this for
7 udg chars
DIM udg(6,7) AS UINTEGER =>{{UDG1},{UDG2},...{UDG7}}
POKE UINTEGER 23675,@udg(0,0)
when I tried this in my program all the graphics looked weird as if every second row was drawn but the program didn't crash.
What do you guys use for debugging btw? I just tend to delete lines till works again or do lots of PRINT statements
I put this in at the start of my BASIC listing
Code:
ASM
LD HL, 65368
LD DE, DATA
LD B,56 <-- I have 7 characters
LOOP:
LD A,(DATA)
LD (HL),A
INC HL
INC DE
DEC B
JR NZ,LOOP
DATA:
DEFB udg 1
DEFB udg 2
etcc...
END ASM7 udg chars
DIM udg(6,7) AS UINTEGER =>{{UDG1},{UDG2},...{UDG7}}
POKE UINTEGER 23675,@udg(0,0)
when I tried this in my program all the graphics looked weird as if every second row was drawn but the program didn't crash.
What do you guys use for debugging btw? I just tend to delete lines till works again or do lots of PRINT statements