Written in 68000. So even a machine code program which uses the OS extensivetv wiII run fast(;r on an Amiga. Yvhite 0502 can bemixed with tktsic intine - where mnemonics are tvpedstraightintoBasic-OHOOO rotBinos can becaMed as extensions, so it is verv easy to tweak programs which need a speed boost. 1' is possihte to run the system without Basic. This drops you into a simpte machine code monitor which witI accept AmigaDos CEI mmmands. Dump or aItcr memory or registers and disasscmbtc and run 0502 programs. Some things the Amiga can't cope with. The BBC has an anatogue joystick port. The command ADVAE is used to rcad this. And since the Amiga uses digitaI joysticks Beebutator ADVAE is tlxed to atways return zéro. I he Amiga keyhoard is différent and so some substitutions have been made. The flO function key mirrors the BBC fO. DEL is used as a copv kev for the BBC's interesting screen editor and Ieft Amiga-hetp performs a break - which resets the machine. Heip on its own coutd have been used. But was considered too IikeIv to he pressed by mistakc. Bits of the operating system which are dupticated by Amiga preferenœs are not imptemented. Things tike the key repeat speed are set from Amiga Workbench. Disc formatting is done from AmigaI)os. And the BBC Ii(TO command *C()MPA(n which tidics up a fragmented ftoppv produces the error message llton Aldflrs?. The Amiga has t)een made to feet Iike a BBC hy emutating the graphies modes {sceIaI)Ie).aIthough the eharacter set tooks very simitar. It is actuaüy ctoser to th(I originaI tetetext design than the Acorn version. The tteehutator powers up in Mode 0. A text onIy. Two cotour mode because this is the fastesI at writing to the screen. On a reaI BBC Mode 7. The tetetext mode - eight cotour with timited graphies - is very much faster because it has hardware support. Whitc Ariadne's Mode 7 is useahte it is not rccommendcd for editing-the manuaI describes it as being tike a very skiüed painter trying to produec toxt as fast as a crummy typewritrr. The speed of Beebutator graphies is most impressive. Amiga