This program provides the programmer with four new commands for Amstrad basic, to enable the Amstrad disc drives to be used to further effect. To get the commands up and running just type in and run the BASIC listing. If the program stops with an error then re-check the data statements. Lines 800-1000 of the listing give a small example of the kind of uses the commands can be put to. The machine code is located at 42000 but it is not relocatable. The commands are: |Read,address of buffer,drive,track, sectorThis command takes a sector from the disc (512 bytes long) and places it at the specified buffer address. The track (0 to 39), and sector numbers must also be specified. System format sectors are numbered &41 to &49, whereas data format sectors are numbered &C1 to &C9. The drive number should also be specified (0 for drive A or 1 for drive B).|Write, address of buffer, drive, track, sectorPerforms the opposite task to the :Read command. Takes the data from the buffer address and writes them to the disc at the specified track and sector positions.a%=0:|Type,@a%Returns the format of the disc in the drive. If a disc is data format a% should be between 190 and 200. If a disc is system format a% should be between 60 and 70.|ZIPDISCSpeeds up the disc drive by 20-30%. For example Sorcery loads in 6 secs instead of 9 secs.|HELPGives a list of the commands and their syntax.If readers do not want to type in the listing, I will provide it on tape or disc for £2.00 or £5.00 respectively. PCW
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CPCrulez[Content Management System] v8.732-desktop/c Page créée en 093 millisecondes et consultée 269 foisL'Amstrad CPC est une machine 8 bits à base d'un Z80 à 4MHz. Le premier de la gamme fut le CPC 464 en 1984, équipé d'un lecteur de cassettes intégré il se plaçait en concurrent du Commodore C64 beaucoup plus compliqué à utiliser et plus cher. Ce fut un réel succès et sorti cette même années le CPC 664 équipé d'un lecteur de disquettes trois pouces intégré. Sa vie fut de courte durée puisqu'en 1985 il fut remplacé par le CPC 6128 qui était plus compact, plus soigné et surtout qui avait 128Ko de RAM au lieu de 64Ko. |
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