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Try these ROM images.

Select the number of ladybugs (lives), and hold down 1 (one player) or 2 (two players) until the game starts.

Is PRINT MEM returning the usual 24871 bytes free?

I could try to copy the ROM DOS first to RAM MAP1 but <snip> The easiest way would be to get your program to do the above, patch out the RAM test routine at $B3CA-$B3D8 with a simple LDX #$7FFE, BRA $B3D9, patch BASIC so that it jumps to your program init routine in RAM instead of returning to the ...

The following code is all that's needed to safely return to MAP0 mode. 6809e code ORCC #$50 * Disable IRQ/FIRQ interrupts CLR $FFDE * Switch to MAP0 mode ANDCC #$AF * Enable IRQ/FIRQ interrupts RTS 63x09e code ORCC #$50 * Disable IRQ/FIRQ interrupts LDMD #0 * Disable 6309 Native mode (FCB $11,$3D,0)...

Rolo wrote: I'll probably expand my memory to 64kBytes for converting big programs. And I hope it is possible to convert cartridges into files and load the data into the proper memory position .

Cartridges can easily be converted with Cartridge Convert.

Attached below is a copy of Sluzzle by John W. Linville. This version of Sluzzle requires a NTSC CoCo 1/2 (or compatible) with a minimum of 32K of RAM fitted. Note: There is no support for PAL machines. :cry: Sluzzle, a sliding puzzle game for the Tandy Color Computer 1 & 2, TDP-100, and other compa...

Here is a modified CoCo and Dragon 32/64 version with colour set selection menu.

Attached below is a copy of Ice Castles by Spectral Associates.

There is an email address at http://www.acornelectron.co.uk if anyone wants to try contacting him directly.