On Wed, 4 Aug 1999, Frank Kontros wrote: > Anyway welcomned. Would you also interested in diskcopier prg for > 1541->C64/C128/C65->PC (I just remembered that sometime ago I promised > you send it). Yes, of course I'm interested. Perhaps then I will finally have a disk copier that does its job in a reasonable amount of time (such as 1-2 minutes). > Marko> The schematic diagram doesn't mention the resistor values. > > Because they're are removed from schematic. They makes much mess > than protect. What about using fuses on each line? :-) > Marko> With careful design, you could make the software auto-detect on which > Marko> computer it is running. :-) > > Hmmm. How? Eg. KERNAL patch. Make all routines in 3 or 4 versions? Make the default load address $0401, because that is the start address of PET BASIC programs. Then assume that the load address is $xx01 and invoke the machine language with a line of BASIC code: 1999 SYS256*PEEK(44)+something Then the machine language will detect its running address (LDA#$60:STA$0100:JSR$0100:TSX:LDA$01xx,X and so on) and patch the routines and/or the routine that installs them accordingly. The hardware can be detected by looking at some ROM locations or at some locations that ought to have I/O chips. > Don't know. Maybe you can source 74HCT74 from LPT port of PC too. I wouldn't count on that. There are so many different types of PC parallel ports around. It is true that this cable is only designed for PS/2-style parallel ports, but having seen how many differences there are between the "traditional" PC parallel port designs, I would rather do the kludges on the Commodore side. So, is it safe to use the DIAG input as a power source, and does it have other functions than activating the diagnostic routines? Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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