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Post by bjonte on Feb 3, 2017 22:35:10 GMT
Is there a trick to do a soft reboot without having the auto boot kick in? I want to exit with a reset but if the disk autoboots the program will start running again...
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Post by gsteemso on Feb 27, 2017 20:46:53 GMT
The book "Mapping the 128" by Compute!'s Gazette can probably answer this question in as much detail as you'd ever want, and then some. The descriptions of the KERNAL ROM routines describe the boot sequence in exhaustive detail.
I don't remember the details off the top of my head, but the boot sequence passes through so many indirections and distinct assembly-language stages that I will be genuinely astonished if your problem takes more than a simple JMP (i.e., SYS) to solve.
If you can't readily get hold of a physical copy of the book, there's a pretty good PDFified scan of it on Bombjack.
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Post by bjonte on Feb 28, 2017 5:47:23 GMT
I actually have the book so I can look at trying to call everything except the thing that auto boots, but I think that it may be harder than it seems since I can't call anything that continues though that routine.
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Post by hydrophilic on Mar 26, 2017 10:22:01 GMT
I hope this is the answer you want... it is the best I can give at any rate! Step-by-step: - Hold down the RUN/STOP key (left of SHIFT LOCK key)
- Press and release the Reset button (near the main power switch of the computer)
- Wait for the "MONITOR" message to appear
- Release the RUN/STOP key
- Enter the magic command ">A04 C1" (to enable BASIC interrupts)
- Enter the well-documented command "X" (to exit the MONITOR and return to BASIC).
Note you can skip step 5 if you don't want/need BASIC interrupts like COLLISION / MOVSPR / PEN / PLAY / SOUND (see my BASIC Encyclopedia of Keywords for details).
Of course if you have questions, please post... and good luck!
[Edit] I almost forgot! Omitting step 5 can, in some cases, result in BOOTING from device 8, which is what you REALLY do not want (if I understand correctly). So follow all 6 steps to reset the CPU without booting from disk... [/Edit]
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