4MB to 1MB of RAM in software?

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4MB to 1MB of RAM in software?

Post by Cosmic Puppet »

Is there a way to trick my Atari into thinking it has 1MB of RAM using software?
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Re: 4MB to 1MB of RAM in software?

Post by Cosmic Puppet »

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Re: 4MB to 1MB of RAM in software?

Post by exxos »

Probably programs in floppyshop PDL which do it. Of course you can set this easily on a ....H5 :lol:
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Re: 4MB to 1MB of RAM in software?

Post by Cosmic Puppet »

Interesting thing just happened.

I booted the atari from TOS 1.0 disk.

Then viewed my disk containing the RAM lowering software and a folder containing MIDIDraw.

On the disk there where a few odd files with symbols under them (probably corruption) and the MIDIDraw folder appeared empty.

This disk was formatted in EmuTOS and is DOS compatible (meaning I can swap between PC and Atari)

I noticed last night that a disk formatted in TOS 1.0 isn't swappable between machines.

Anyway...when I reduced my RAM to 1MB the files on my floppy disk appeared normally and the MIDIDraw folder was populated.

Makes me wonder now if my RAM is implicated in some of my past issues (which are easily worked around in my main setup)

MIDI Draw still only manages the start screen and is frozen.

I wonder if this might be copy protection?

20210626_162211.jpg
20210626_162211.jpg (270.55 KiB) Viewed 3376 times
US Atari 520 STFM (C070523-001 REV.D1) , Exxos PSU, 4MB Marpet Upgrade, Exxos 6 Chip TOS 1.04 USA, EmuTOS 20211020, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor, Star LC-10c Printer, iMP C100110-001 DMA.
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Re: 4MB to 1MB of RAM in software?

Post by exxos »

Not sure, but I thought TOS1.00 couldn't even read DOS disks ?
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Re: 4MB to 1MB of RAM in software?

Post by Cosmic Puppet »

Probably should leave that rabbit hole @exxos :lol:

Peter's RAM program is great. I can run PHYSTOP.TOS in EmuTOS and it restarts my setup and reports the new RAM on the start screen.

Found out that MIDIDraw needs 1MB to run.
US Atari 520 STFM (C070523-001 REV.D1) , Exxos PSU, 4MB Marpet Upgrade, Exxos 6 Chip TOS 1.04 USA, EmuTOS 20211020, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor, Star LC-10c Printer, iMP C100110-001 DMA.
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Re: 4MB to 1MB of RAM in software?

Post by Cosmic Puppet »

exxos wrote: Sat Jun 26, 2021 4:17 pm Probably programs in floppyshop PDL which do it. Of course you can set this easily on a ....H5 :lol:
Only just saw this! :lol:
US Atari 520 STFM (C070523-001 REV.D1) , Exxos PSU, 4MB Marpet Upgrade, Exxos 6 Chip TOS 1.04 USA, EmuTOS 20211020, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor, Star LC-10c Printer, iMP C100110-001 DMA.
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Re: 4MB to 1MB of RAM in software?

Post by derkom »

exxos wrote: Sat Jun 26, 2021 4:32 pm Not sure, but I thought TOS1.00 couldn't even read DOS disks ?
IIRC (someone correct me if I'm wrong, as it's been eons), TOS 1.0 can read DOS floppies fine, just doesn't format floppies that DOS machines can read.
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Re: 4MB to 1MB of RAM in software?

Post by Darklord »

Think it was TOS v1.4 and up that allowed both...

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Re: 4MB to 1MB of RAM in software?

Post by derkom »

Darklord wrote: Sun Jun 27, 2021 4:56 am Think it was TOS v1.4 and up that allowed both...
That's the cutoff I recall as well, but again I thought it was about formatting, not reading and that TOS could always read a MS-DOS-formatted floppy. Perhaps someone who knows for sure can set the record straight.
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