RE: 1541IDE and 1541IDE-S
Date: 2007-11-29 16:01:22

Hallo Per,

> Very cool. Am I correct in thinking that fastloaders that rely on job
> codes for the low level disk access will still work?

Hmmm, I don't know. Fastloaders that only interfere with the actual
communication, like JiffyDOS and the Power Cartridge, shouldn't have any
problem IMHO. But speedloaders that interfere with the disk access
itself will have problems, I fear. For example, there is a job code for
moving the head in the original 1541 and as that makes no sense anymore,
I removed that part. As I reused some of the freed zeropage addresses
there is a chance that such a program, trying to speed up things,
unwantedly changes a completely different parameter. OTOH the codes for
reading and writing a block, $80 and $90, are still supported.

FYI, I didn't move any existing RAM variable. For example, the variable
that tells the drive it is in VIC-20 or C64 mode ist still on the
original place although it was very inconvenient as most variables
around it are not used anymore and I could have used the freed space
better if it was moved.

I have a free day tomorrow and, if my lovely wife will let me :), I hope
to finish the 1541IDE-S project.

    / __|__
   / /  |_/     Groetjes, Ruud
   \ \__|_\
    \___|       URL:


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.

Stichting Pensioenfonds ABP is gevestigd te Heerlen en ingeschreven bij de Kamer van Koophandel Zuid Limburg onder nummer: 41074000

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.

Stichting Pensioenfonds ABP, having its registered office at Heerlen, is registered in the Traderegister of the Chamber of Commerce Zuid Limburg (Maastricht), the Netherlands, registration number: 41074000

       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.