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Sure thing, didn't realise you were using the other module: https://github.com/pgreenland/attinyrtcmodule/tree/write_on_timeout I've applied exactly the same changes as with the single chip solution. Will test on my SE/30 when I'm tinkering with it next, in the meantime let me know how you...

Have taken an initial look. The behaviour appears to be quite different to the SE/30 when it comes to the write protect register. The SE/30 was seemingly writing to the register all the time, which is why I chose to use it as a means of attempting to save on EEPROM wear and tear. The IIGS...

Thanks Rich, captures look good. Will let you know if I spot anything. As soon as a find a the time to look at them. Thanks, Phil

Hey, Yep, it's been fine till this day....well it's developed RAM problems since, but the floppy always works :-P I was nosing around with the logic analyser trying to find a bad chip. It took me way too long to spot that the write signal was generated by UH7 from a couple of other signals...

Hey, It may well work differently on the different families. I've only been able to test on SE/30's myself (only machines in my collection....so far). Inside Macintosh Volume III, page 37 https://vintageapple.org/inside_o/pdf/Inside_Macintosh_Volume_III_1985.pdf contains a description of the...

Thanks for the tips....might want to take a look at the code though. FIGnition looks cool.....rather than writing your own optimiser did you consider asking GCC to optimise for you?....compilers tend to be good at that sort of thing if you twiddle the right switches.

Hey Rich, Yep that would be perfect. If you've got enough channels, capturing the clock, data, select line and one second line would be good. If you've got one of the Saleae Logic clones, the Saleae file would be easiest. If its a sigrok supported one, that works too :) I've just had a go...

Hey, Good to heard that you're making progress of sorts. I've not tried it with a battery myself. All of my machines are battery bombed unfortunately (oh to have a working battery holder :p ), which is partly why I was interested in a microcontroller replacement. Looking at the datasheet...

Awesome! PRAM and clock pulse wise. The PRAM is used to store and maintain the system time/date, along with a load of other basic settings, like volume, mouse speed, keyboard repeat delay. Usual sort of OS things. I'm sure others could confirm but the one second pulse line would likely be used...

Nice one.....I spent ages....like weeks trying to track down a problem with one of my machines. Turned out to be a dry joint 🙈 . I'm not too familiar with the IIGS. There are several (at least one or two others) RTC emulator projects out there. I tried these on my machines are first before...

@ymk phew....nice bit of accidental headroom in that case :cool: @tt The few I've made, aka the four I needed for my machines + the green one above were all hand assembled. If there was enough interest in them I was going to look at having the PCB manufacturer (JLCPCB) assemble them too. The...

If you're using the PDIP-8 package (that drops straight into mac) they fit in the ZIF socket on the programmer just fine. I've just tried it with the T48 (which might also be known as the TL866 Plus or TL866-3G), it reprogrammed my old chip just fine, so must be using the high voltage...

@trickydee I've been using the a T48, a slightly updated version of the TL866 I think. I bought it with the exact same excuse as you - programming some GALs and EEPROMs for a Bolle SE/30 replacement logic board. It programs the ATTiny's just fine too. You're right in that the ebay programmer...

The nor flash quite nicely drops in place of the original ROMs. I thought they were quite a bit faster than required. However on closer inspection the access time is 70ns, which would lead to a max read rate of ~14Mhz. I should probably double check that access time against the original ROM...

I initially added the ROM switching to cover stock vs custom ROM. While debugging my rebuilt machines I found a few test tools that weren't happy with the modified ROM. Possibly a bit overkill when the alternative would be to just swap out the ROM. Being able to switch between two different ROM...

Hi All, Having used BMOW's Rominators in my first two SE/30 restorations, I found them out of stock while looking for a third.....so thought it was time to build my own custom SIMM and programmer. I also wanted slightly more space than the 2MB available, so took some inspiration from other...

@Phipli thanks! I'm about to dive in to my dead SE/30 analog board, which was working last time I used it....I've put off looking at it for far too long. @croissantking Something like that? 🙈 :p

To save starting a new thread....this feels like a good place to ask if anyone has a schematic for the SE/30 analog board? I've only managed to track down the SE version so far. I'd assume they'd be similar?.....but you know what they say about assumptions.

Nice + Just started the process of gathering the bits for a Bolle Reloaded board myself. After fixing traces on the better of two machine, I decided I'd be chasing them forever on the worse one. No harm in having the battery in, it may well work just fine, but won't do any harm if it doesn't...

That looks like the perfect programmer for the job, chip drops straight in, no fiddly connections to make. The source code was written with the avr-gcc toolchain in mind, which sits under the hood of the Arduino framework. I used it directly, partly because I always do and partly because it...