hello,
going into production ?
regards
john
"New" SD interface
Re: "New" SD interface
I notice that you didn't use a trimmer capacitor with the PCF8583 crystal ?
I built a Minerva Mk2 last year from discrete 74xx logic. Without a trimmer capacitor my PCF8583 clock ran very fast. With QL powered up it was 3 minutes fast per hour!, but only reducing to 20 seconds fast per hour when on battery.
I solved the 3min/hour problem by putting 220pF capacitor across PCF8583 pins 4 & 8 (noisy QL hardware). With a 30pF trimmer between pins 1 & 8 I was able reduce RTC error to less than 1 second a day
I notice from a photo of real Minerva MK2 that they also used a trimmer.
BTW I thought I had a faulty NETwork until I realised if you initialise all RTC ram locations to 0, the NET number gets set to 0 upon each reset (should default to 1). This stops the TK2 network fileserver from working (SuperBASIC NET command disallows setting NET 0, but Minerva MK2 does, oops).
I built a Minerva Mk2 last year from discrete 74xx logic. Without a trimmer capacitor my PCF8583 clock ran very fast. With QL powered up it was 3 minutes fast per hour!, but only reducing to 20 seconds fast per hour when on battery.
I solved the 3min/hour problem by putting 220pF capacitor across PCF8583 pins 4 & 8 (noisy QL hardware). With a 30pF trimmer between pins 1 & 8 I was able reduce RTC error to less than 1 second a day
I notice from a photo of real Minerva MK2 that they also used a trimmer.
BTW I thought I had a faulty NETwork until I realised if you initialise all RTC ram locations to 0, the NET number gets set to 0 upon each reset (should default to 1). This stops the TK2 network fileserver from working (SuperBASIC NET command disallows setting NET 0, but Minerva MK2 does, oops).
David
Re: "New" SD interface
This card is very very interesting. I hope you can solve the issues related to the software.
I take this opportunity to thank Tetroid for his work, and remember the good work that José Leandro and Habi did from Spain with his QubIDE clone.
I take this opportunity to thank Tetroid for his work, and remember the good work that José Leandro and Habi did from Spain with his QubIDE clone.
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Re: "New" SD interface
Hi,badaman wrote:This card is very very interesting. I hope you can solve the issues related to the software.
I take this opportunity to thank Tetroid for his work, and remember the good work that José Leandro and Habi did from Spain with his QubIDE clone.
I bought one of José Leandro expansion cards, which is working well, I have updated it to Qubide V2
I use the Habi Image Editor to transfer files into Qubide partitions on CF Cards. Works really well.
I was wondering if the source code was available or maybe an option to write a Qubide image to a CF/SD Card.
Do that the partitions could be set up on a PC or other computer.
Regards,
Derek
Derek
Re: "New" SD interface
Hi. I don't know if I understood you well, but have you seen if the José Leandro's instructions for Linux are useful to dump that type of images?Derek_Stewart wrote:I was wondering if the source code was available or maybe an option to write a Qubide image to a CF/SD Card.
Do that the partitions could be set up on a PC or other computer.
There are free programs for Windows too that allow you to copy and record images from SD cards.