Trackman2 (Mandelbrot)

[neell00]

Hi,
I downloaded this mandelbrot generator but unfortunately it won't work on BBCbasic on my Mac.
Numer too big, 920. dim Q% 700000 , well 700000 is probably too big!
Is there something that can be done?

[Richard Russell]

I downloaded this mandelbrot generator but unfortunately it won't work on BBCbasic on my Mac.

That program is very platform-specific, most obviously it contains ARM assembly language code:

Code: Select all

 7690     [OPT PASS
 7700     MOV AH,Rm,LSR #16
 7710     MOV BH,Rs,LSR #16
 7720     EOR AL,Rm,AH,LSL #16
 7730     EOR BL,Rs,BH,LSL #16
 7740     MUL Rh,AH,BH
...

as well as a SYS call to RISC OS:

Code: Select all

  130     SYS "ColourTrans_WritePalette",-1,,pal%

So you'd need something like a Raspberry Pi running RISC OS to run it.

What's 'special' about it? There's a Mandelbrot program supplied with BBC BASIC for SDL 2.0 in the examples/graphics/ directory.

[neell00]

I'm just curious. I've got a Pi2 so I'm gonna try.

[Ric]

Hi neell00,
Not sure pi2 will run bbcsdl, you might have to buy a pi3

[neell00]

well, I've had a Pi4 but it didn't do well with RiscOS Open, 5.28 I guess so I sold it.
Pi2 runs 5.30

[Richard Russell]

Hi neell00,
Not sure pi2 will run bbcsdl, you might have to buy a pi3

The OP doesn't want to run BBCSDL, he needs RISC OS for that program. RISC OS will definitely run on a RPi 2 (so should 32-bit BBCSDL, but slowly).

[neell00]

What's 'special' about it? There's a Mandelbrot program supplied with BBC BASIC for SDL 2.0 in the examples/graphics/ directory.

you're right, your program is also nice and doesn't require a Raspberry pi or rpcemu setup.
Rpcemu runs this new version of Trackman fine.