adaptive startup-sequence depending on accelerator ram

On my amiga1200 running os3.9, I have an mtec viper t1230 card with 8mb of ram on it, hence disabling the pcmcia wifi card. I found an undocumented configuration with 1 jumper change that allow to use only 4mb on it hence allowing to use pcmcia network card. So I hooked a switch on it to make it 4/8mb at power on.

Now what I would like is to load the network stack on startup-sequence only when there is less than around 4mb of ram, then in 8mb mode I got the maximum available. I would like to have it automatic, so I dont have to manage startup-script or being asked question at boot.

Maybe there is a program to detect the amount of ram ? Or try to detect pcmcia and if it fail raise an error level that would skip the network stack loading ? I'm very new to the amiga scene so I have no idea where to start, any suggestions would be appreciated.

[talybont]

Maybe this will get you a step closer to a solution:

http://ftp.sunet.se/mirror/archive/f...li/getinfo.lha

From readme:

Format: GetAvailMem [CHIP|FAST|ALL]

Description: This little program will return available memory in a global
environment variable called: MEMORY.

Example: 1.RAM> GetAvailMem Chip
1.RAM> Getenv memory
920355
1.RAM> echo $Memory
920355

[talybont]

Or:

http://ftp.sunet.se/mirror/archive/f.../Check4Mem.lha

[daxb]

If you don`t find a better solution you can try "avail" command. In S-S it should be sufficient to check amount of avail memory. "Avail fast" or "avail total" should do the trick. I think some days/weeks ago someone posted an example you could use. Something like this:

IF `avail fast` GT 5000000
  echo "yes"
ENDIF

Thanks talybont and daxb for your inputs. 'avail' is on my system already so I'll use it and your code snippet is very appreciated to boot that project. I think prism2 and other tcpip stuff get loaded even though there is no nic on the system so hopefully this will save me a bit of ram, I'll get back with the results when I have finished editing S-S and U-S. Regards.

It was way more work than I expected, but I learned many thing and overall I was able to save 250kb of ram, when you only have 8mb that's worth while.

in USER-STARTUP I test the ram to prevent the wireless manager and the assign of AmiTCP. But I found I gain few or no memory and prism2 kept loading, so I did try to put that code after the Assign block (env:, T:, clips, ...) of S-S :

IF `C:avail fast` NOT GT 6000000

  RUN <>NIL: RENAME DEVS:Networks DEVS:_Networks

ELSE

  RUN <>NIL: RENAME DEVS:_Networks DEVS:Networks

ENDIF

Only that way I prevent the loading of prism2 and other network related devices and got a signifiant memory gain.