Floppy Drive Emulation Speed and available memory

[Supamax]

Hi Toni,

while testing the game "jumping jack'son" (copyright 1990 infogrames) I noticed that it doesn't load with normal A500 config (no external drives, 512KB onboard RAM, KS 1.2 etc.), but loads with A500+512KB slow RAM.
This seemed strange to me, since it's a game which should run on basic Amiga 500s without RAM expansions.
I then tried loading it in WinFellow (again, basic A500 config) and it loaded fine.

I then discovered that:
- when loading it in WinUAE with 800% floppy speed, I get a not enough memory error
- when loading it in WinUAE with 100% floppy speed, it loads correctly.

Does the 800% speed option "eats" away some system memory?
I can upload the .adf to The Zone if needed.

[Retro-Nerd]

I assume the 800% speed setting makes it a bit incompatible somehow, nothing to do with "memory eating". Have you tried an IPF image?

[StingRay]

Originally Posted by Supamax

I then discovered that:
- when loading it in WinUAE with 800% floppy speed, I get a not enough memory error
- when loading it in WinUAE with 100% floppy speed, it loads correctly.

Jumping Jack'son uses a hardware trackloader iirc, 800% floppy speed is a bad idea here! Most probably the loader bugs out with an error and gives a wrong error message.

[Supamax]

Originally Posted by Retro-Nerd

I assume the 800% speed setting makes it a bit incompatible somehow, nothing to do with "memory eating".

I thought about it, but I'm curious to hear Toni's opinion, since I noticed other titles with similar behaviour (but don't take this as a fact, I have to re-test them! I could be absolutely wrong).

Have you tried an IPF image?

No.. I'll find it and try it

[StingRay]

Originally Posted by Supamax

I thought about it, but I'm curious to hear Toni's opinion, since I noticed other titles with similar behaviour (but don't take this as a fact, I have to re-test them! I could be absolutely wrong).

Why do you expect any game to work with 800% floppy speed?

[killergorilla]

"Only difference between 100%, 200%, 400% and 800% is emulated disk rotation rate. (100% = regular 300RPM, 200% = 600RPM etc..) Everything else is emulated exactly."

[Retro-Nerd]

Just tried the IPF #1040 and it works fine with 512KB Chip+800% Floppy Speed. Anyway, i prefer to use 100% Floppy Speed and the WinUAE warp mode.

[StingRay]

Originally Posted by Retro-Nerd

Just tried the IPF #1040 and it works fine with 512KB Chip+800% Floppy Speed.

Doesn't say much as the crack most probably uses a totally different loader.

[Retro-Nerd]

True, that's why i suggest to use an original disk image.

[StingRay]

Just tried the MAD version, works for me with 800% floppy speed and 512k RAM only.

[Retro-Nerd]

Then Supamax probably tried the Big Angus or ACC crack.

[TCD]

Originally Posted by Retro-Nerd

Then Supamax probably tried the Big Angus or ACC crack.

Remove the Big Angus crack aswell Just tried with the 1.2 512 KB Chip quickstart and 800%.
Edit : The ACC crack gurus with that config though.

[Supamax]

Originally Posted by StingRay

Just tried the MAD version, works for me with 800% floppy speed and 512k RAM only.

The version I tried is MAD, too...
The guru-like message I obtain is "SORRY, NOT ENOUGH MEMORY TO RUN".
I updated the adf to The Zone; can you test it? Perhaps it's slightly different from yours ?

EDIT: did you use KS 1.2 or 1.3?
EDIT2: I used WinUAE 2.0.0 public beta 17

Originally Posted by StingRay

Why do you expect any game to work with 800% floppy speed?

No no... I just prefer to use 800% first, since it's faster.
If it doesn't work I switch to 100% and reload .

[Toni Wilen]

Why should I care if some trackloading games do not work with non-100% floppy speeds? Some work, some don't. (EDIT: it does not use any extra memory, just confused loader)

You can always use "warp mode" (end+pause) for "compatible speedup"

[Supamax]

Originally Posted by Toni Wilen

You can always use "warp mode" (end+pause) for "compatible speedup"

Wow, this is interesting! Was it documented or is it a juicy news?

[TCD]

Originally Posted by Supamax

Wow, this is interesting! Was it documented or is it a juicy news?

Originally Posted by WinUAE readme

WinUAE 0.8.22 Release 4

New features:

- new keyboard shortcuts: PAUSE-pause emulation, PAUSE+END-turbo speed

[Supamax]

@ TCD

oops!

[TCD]

I know that the readme is a 'tad' hard to read, but well worth it

[demoniac]

Originally Posted by Retro-Nerd

Just tried the IPF #1040 and it works fine with 512KB Chip+800% Floppy Speed. Anyway, i prefer to use 100% Floppy Speed and the WinUAE warp mode.

For IPFs, WinUAE sets the speed to 100% regardless of setting.

[Toni Wilen]

Originally Posted by demoniac

For IPFs, WinUAE sets the speed to 100% regardless of setting.

Only "turbo" is not compatible with raw images.