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sorry, I just wrote a lot. In short: according to a BASIC dissasembly from the book "Das Dragon Lexicon", this code is only called from within the ROM2, the Basic ROM when in mode64, so it should not affect the Dragon in 32 mode. pere That information in that book is wrong (as you can see from the ...

I have known since 1984 exactly how that code works, and what it does. What I still don't know is if/why the code is required for using the serial port.

Can anyone explain why the following code is needed for the Dragon 64's serial port. Can the serial port be used in 32 mode without the IRQ secondary vector pointing to the start address of this code? BF20 F6FF05 LDB $FF05 BF23 2A0D BPL $BF32 BF25 C408 ANDB #$08 BF27 2708 BEQ $BF31 BF29 B6FF06 LDA $...

If you add " start " to your XROAR (Windows) batch files, the command prompt window will not remain open when XROAR is running. The examples below show some common configurations for Dragon 32 and 64 emulation with start added before the XROAR command line. Dragon 32 with 6809e CPU (default), and St...

The attached program is for temporarily restoring the DLOAD/M command in 64 mode. You can't use the above mentioned pokes to switch between the RKEYS and DLOAD commands when the computer is in 64K RAM (MAP1) mode.

I assumed that "-machine" was deprecated because I didn't see it listed as a command line option (even though it is there when you take the time to read the instructions carefully). :) 2.1 Machines With no other options, XRoar searches the ROM path and determines which supported machine has firmware...

It looks like "-machine" may also be deprecated. Replaced by the "-machine-arch" option. The following batch file should emulate Dragon 64 hardware with a 6309E CPU and Steve Woolham's Enhanced BASIC ROMs v3.1. @echo off xroar -vo sdl -machine-arch dragon64 -machine-cpu 6309 -extbas d64rom1V31.rom -...

Attached below is a small program (only 188 bytes long) that is designed to copy ROM to RAM, and restore the DLOAD/M command on a Dragon 64 that has been upgraded with Steve Woolham's enhanced ROMs. The program can be loaded very quickly from cassette or disk on a real Dragon 64 for temporarily rest...

You have to use "-cart-rom" with "-machine-cart".

The -dostype option is for selecting the cartridge hardware type (dragondos, delta, rsdos). The -dos option is for selecting the ROM image (ddos10.rom, ddos11c.rom, ddos40.rom, etc). 3.7 Floppy disk images XRoar supports virtual disks by emulating three different types of disk controller cartridge (...