HP-41CY re-initialization ROM
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12-25-2019, 09:21 PM
Post: #41
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RE: HP-41CY re-initialization ROM
(12-24-2019 08:18 PM)Sylvain Cote Wrote: I just received my first 41CY (64K) with -RAMBOX 64b ROM.Bravo ! If you do PG<> then you should see -RAMBOX 64a , at least it is how it works in Emu41 :-) Quote:I have the manual for the RAMBox unit but I do not have one for the 41CY in English.Look for "41CY" on the TOS :-) J-F |
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12-26-2019, 12:42 AM
Post: #42
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RE: HP-41CY re-initialization ROM
(12-25-2019 09:21 PM)J-F Garnier Wrote: Bravo !Merci! (12-25-2019 09:21 PM)J-F Garnier Wrote: Look for "41CY" on the TOS :-)I had looked and found the German version of the 41CY manual but not the English version. Anyway, I did an OCR scan of the manual and with the help of Google Translate, I was able to get the information that I needed. (12-25-2019 09:21 PM)J-F Garnier Wrote: If you do PG<> then you should see -RAMBOX 64a , at least it is how it works in Emu41 :-)After reading the manual translation, I tried the functions (PG<>, PG10, PG01) to switch the banks. The result was that CAT2 stopped working correctly. After that, I tried a Memory Lost and asked the 41CY to clear its QROM, but to no avail. So, I will need to follow Jürgen procedures to reinstall the whole thing correctly. I am still searching how to disable QROM pages with the 41CY like it is possible with the RAMBOX & RAMBOX II. If not, i will experiment with physical modules to see how the system behaves. (bus contention, etc) Sylvain |
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12-26-2019, 07:54 PM
Post: #43
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RE: HP-41CY re-initialization ROM
(12-26-2019 12:42 AM)Sylvain Cote Wrote: I am still searching how to disable QROM pages with the 41CY like it is possible with the RAMBOX & RAMBOX II.Short answer: Not possible with the CY. It's the trade-off for having it all inside instead of mounted externally;-) The only switches in a CY are the Turbo switch and the write protection switch for page 8, where the RAM-Box OS resides normally. To override ill-behaved RAM pages you could try with a couple (better quadruple) of 8K ROM modules, like the Petroleum or Math/Stat pacs. However if the calc hangs after trying to switch banks then the best thing is to wipe out that bank completely, and reinstall using Jürgen's method. I could also revive your CY easily, but if you have a Clonix, Jürgen's method may be cheaper, since you can do it yourself;-) -- Ray |
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12-27-2019, 06:59 PM
Post: #44
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RE: HP-41CY re-initialization ROM
(12-26-2019 07:54 PM)Raymond Del Tondo Wrote:Bummer(12-26-2019 12:42 AM)Sylvain Cote Wrote: I am still searching how to disable QROM pages with the 41CY like it is possible with the RAMBOX & RAMBOX II.Short answer: Not possible with the CY. (12-26-2019 07:54 PM)Raymond Del Tondo Wrote: It's the trade-off for having it all inside instead of mounted externally;-)Not happy about it, but I understand. (12-26-2019 07:54 PM)Raymond Del Tondo Wrote: The only switches in a CY are the Turbo switch and the write protection switch for page 8, where the RAM-Box OS resides normally.I am seeing only the turbo switch on the side, no page 8 protection switch in view. I have plugged the ZENROM module in port 2 and tried to erase page 8 with MCED / CLR but it did not worked, so clearly the page 8 is protected somehow. That smell that I will have to open up the unit. (12-26-2019 07:54 PM)Raymond Del Tondo Wrote: To override ill-behaved RAM pages you could try with a couple (better quadruple) of 8K ROM modules, like the Petroleum or Math/Stat pacs.CAT 2 does not completely works but the system is still able to find the functions in the pages FAT. (12-26-2019 07:54 PM)Raymond Del Tondo Wrote: I could also revive your CY easily, but if you have a Clonix, Jürgen's method may be cheaper, since you can do it yourself;-)Since I have all Diego's fantastic modules and in multiple copies, that should not be a problem. Thank you! Sylvain |
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12-27-2019, 07:32 PM
Post: #45
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RE: HP-41CY re-initialization ROM
Hello Sylvain
Remove the batterys and take a small pin to unprotect the O/S on page 8 with the switch. Patrik |
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12-27-2019, 08:04 PM
Post: #46
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RE: HP-41CY re-initialization ROM
(12-27-2019 07:32 PM)CY-CL Wrote: Remove the batterys and take a small pin to unprotect the O/S on page 8 with the switch.Wow, you really have to know that there is a switch there. Page 8 has been erased and CAT 2 is now working as expected, time to leave for another family reunion. Tomorrow, I have to clear the page 8 of the 2nd bank, carefully read Jürgen's instructions and then reinstall -RAMBOX 64a & -RAMBOX 64b ROM's. Thank you! Sylvain |
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12-28-2019, 04:37 PM
Post: #47
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RE: HP-41CY re-initialization ROM
I was able to successfully reinitialize my 41CY this morning.
Jürgen's instructions are clear and very easy to follow, his HP-41CY Technical Information gives a great understanding on how the bank switching works on the 41CY, which I didn’t completely understood by reading the Google translation of the German owners manual. I will order another Clonix-D module from Diego that I will setup with Jürgen's configuration then add it as the initialization module to the 41CY kit. It also allowed me to discover his HP-41 MCODE Example Project on OSX project, which I was not aware and which I will try in the next few days. Thank you Jürgen ! Sylvain |
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06-23-2024, 06:43 AM
Post: #48
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RE: HP-41CY re-initialization ROM
(12-28-2019 04:37 PM)Sylvain Cote Wrote: I was able to successfully reinitialize my 41CY this morning. Just stumbled across this thread today morning. I completely missed that! I'm happy to hear that the RB2INI procedure helped to re-install the 41CY O/S. Today, we have the 41CL (so powerful that I will probably never be able to fully explore) but back then, the 41CY was a real gem and is still a lot of fun today. Enjoy it! |
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