Posted By
Guest
on 2012-04-23
04:39:14
|  Re: 1551 ?Device not present error
Thank you.
1. As it has been almost 30 years since I last used the Plus 4 I do not understand:
Check if the 1551 paddle is visible in the plus/4 address space. For example in monitor m fec0 feff repated several times should return a stable value in either fec0-fecf (device #9) or fef0-feff (device #8) ranges. (for example clear the screen and enter the statement to the top then press home and return several times)
An example result from yape:
M FEC0 FEFF
2. I found this article but do not know if the replacement chip is available:
http://www.zimmers.net/anonftp/pub/cbm/documents/projects/drives/1551-tia.gif
3. I was not aware that a normal 1541 mechanism would not do. I have seen no mention until I read your post.
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