Well, the 24.1 daily hours of schoolwork?
Code:
unsigned char RandInt ( unsigned char Range )
{
Range;
_asm
push de
push af
push bc
push hl
ld b, 4(ix)
ld hl,(#0x9d95)
ld a,r
ld d,a
ld e,(hl)
add hl,de
add a,l
xor h
sbc hl,hl
ld e,a
ld d,h
iRandomLoop:
add hl,de
djnz iRandomLoop
ld a,h
pop hl
ld l,a
pop de
pop af
pop bc
_endasm ;
}
unsigned char Rand8 ( void )
{
return RandInt(255);
}
char Rand16 ( void )
{
return (RandInt(255)*255)+RandInt(255);
}
unfortunately Rant16 doesn't work that great (can anyone see what i'm screwing up?), but oh well
Kerm, do you see why Rand16 isn't working right? It will either return < 160 or > 65000
Rand8 works just fine as far as i can tell (returning a fairly random looking number between 0-255), and RandInt also appears to be working just fine
Rand8 works just fine as far as i can tell (returning a fairly random looking number between 0-255), and RandInt also appears to be working just fine
KermMartian wrote:
Kllrnohj: yes. It's interpreting it as a signed 2-byte int, not an unsigned 1-byte int. 
whoops....the NEW Rand16() (which is tested and does return values between 0-65535 fairly well)
Code:
unsigned short Rand16 ( void )
{
return (RandInt(255)*255)+RandInt(255);
}Oh, and for anyone who wants to write a function, it goes like this:
for the paramaters, its (4+n)ix for the parameters (so for a 2 byte parameter (or two 1 byte parameters), it would be ld h, 4(ix) ld l, 5(ix)
To RETURN a value, its L for one byte, HL for two bytes, and something else that i forgot for 4 bytes, lol (look in the SDCC documentation under Z80 somwhere)
Register to Join the Conversation
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Advertisement