From: Christian Johansson (c64_at_comhem.se)
Date: 2003-09-09 19:40:27
Yes, it is probably the old buggy ROM. I have one 1571 with the old ROM and another one with the new ROM. With the one with the old ROM, I get exactly the same problem. Another known problem with the old ROM that I have also experienced is that it is not possible to LOAD files that are protected against deletion (marked with "<" in the directory) on a disk in 1541 format when the computer is in C128 mode. This results in "?FILE NOT FOUND ERROR". The bugs don't matter much to me so I'm not going to upgrade the ROM.
Here is a program with which you can check which ROM version you have:
10 OPEN1,8,15
20 PRINT#1,"M-R"CHR$(0)CHR$(192)CHR$(2):GET#1,A$
30 CLOSE1
40 A=ASC(A$+CHR$(0))
50 IFA=56THENPRINT"1571 WITH NEW ROM CHIP":END
60 IFA=66THENPRINT"1571 WITH OLD ROM CHIP":END
70 IFA=132THENPRINT"1571CR"
Regards,
Christian Johansson
----- Ursprungligt meddelande -----
Från: "eyethian" <eyethian@msn.com>
Till: <cbm-hackers@cling.gu.se>
Skickat: den 9 september 2003 17:29
Ämne: Re: Faulty 1571 drive?
> Hello.
>
> It sounds like you have the buggy ROM. If you upgrade the ROM, the 1571
> drive should work fine. I experienced the same problem before upgrading it
> with a JiffyDOS kernal ROM.
>
> Enjoy.
> -Todd Elliott
>
> ----- Original Message -----
> From: Mikael Holm
> I have a CBM 1571 drive to my C128. It seems to have some trouble reading
> single sided disks. It does work, but it spends an awful long time reading
> before it actually reads the directory. Double sided disks are handled
> quickly.
>
> Is this normal? Is it harmful for the drive? What can I do to fix this?
>
> Regards,
> Mikael Holm
>
>
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