Posted By
xahmol
on 2024-09-03
11:39:16
 |  Re: 1551 not working, please advice
@SYS I do hear drive rattling. So stick with the head cleaning or head failure diagnosis.
Drive ID string is correct after typing JiffyDOS @ command, so communications appears to be OK.
All:
But I am now seriously baffled by trying the Super/Script cart again.
The little asseembly startup routine did not do much apart from garbled screen. But to my big surprise after a reset suddenly the cart was there on F2.
First thought: OK, start routine in assembly works, just needs a reset after. But that was not repeatable.
Did a power cycle, and cart appeared directly without the assembly code.
So tried to reproduce: repeated power cycles while cart remains plugged in: remains working. Power off. Take it out, power on, power off, and back in again, power on: no cart on F2. Try again, it is there.
Can not see any consistent behaviour, but if I try long enough, the cart apparently takes preference on JiffyDOS.
Almost seems that JiffyDOS and the cart have a race condition to see which one takes preference, and that winning is dependent on a factor I did not yet discover.
Or something is iffy about my cartridge port of course.
The word processor itself is by the way (as I already expected) not that exciting: same as SuperScript on C64. And have way better word processors for the C128 I also have (VizaWrite128 and GeoWrite128). So this cart for me is in the category: cool to try it once and see it working, not more.
Oh, and obviously did try if several attempts did anything on the 1551 as well. But there the results are completely consistent: communications appear to work, disk head not.
Any thoughts?
Photos:
First tru after that assembly routine:
Then suddenly the cart is there, but not always:
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