From: Baltissen, R (Ruud) (ruud.baltissen_at_abp.nl)
Date: 2003-06-02 09:42:20
Haloo Andre, > I had to use this, as the state engine is not polling all the > time as e.g. a program in the CBM disk drives. I completely forgot that VICE does much much more then just emulating a drive. I already mentioned how sensitive the 8032-SK is regarding transmission schemes. Saving a program was no problem at all: I could use the same routine as used for the C64. But loading it again..... :( After sending the code $60, which means 'you can talk', the drive only has a small window of time where it must start its transmissions. My program needs some more time because it's not reading the data directly from the surface of a disk into memory. This last sentence triggered me to use a RAM-disk and that did work indeed. But I want my emulator to emulate more then one device including printers and I cannot expect people to use more modern computers with lots of memory onboard so it can supply a RAM-disk. And FYI, I want to support my own 8250-compatible 16 MB drive but I'm also aiming at using old 486-computers as CBM-servers. And 486's with more then 16 MB of RAM aren't that common AFAIK. My solution for the moment is looking for the needed data or info right after receiving the name of the file, like I do with the directory. But I must admit that I haven't checked when the real drive starts looking for a file that has to be loaded. One thing just occured to my mind: at this moment I'm using a 1001 as reference. I haven't thought about using a 4040. This device has to search two drives and that certainly takes much more time then what the 8032 allows. Still some research to do I see. -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org =====DISCLAIMER================================================================= De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose its contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. Message was sent through the cbm-hackers mailing list
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