I just got my PCB on Thursday and I must say it's very exciting! The quality of these boards is incredible.
I mentioned "slow" in the subject because I don't have most of the stuff I'm going to need to assemble my board, and I'm not even ready to begin.
Unlike most of you guys, I've got a DIP64 HC CPU (16MHz) which I'm hoping can be installed in one of the expansion sockets, instead of a PLCC CPU. My donor chipsets are PLCCs. The SIMM socket price is ...not ideal. I think I'm going to chuck half a meg of DRAM on a veroboard to plug it into the falcon RAM socket instead of giving money to Big-SIMM-Socket, those corrupt bastards.
I don't think I'm going to bother installing some of the non-essential sockets like the cartridge port. Too lazy to desolder it!
Smonson's slow H4 build
Re: Smonson's slow H4 build
to the H4 party @Smonson
CPU in one of the expansion sockets should be fine and an interesting test for the board.
Looking forward to seeing your HDMI board on the H4
CPU in one of the expansion sockets should be fine and an interesting test for the board.
Looking forward to seeing your HDMI board on the H4
Re: Smonson's slow H4 build
Now that everyone's finished their boards, it's time for me to start:
I got all the SMTs on there.
With the benefit of everyone else's hindsight, I cut three tracks underneath the video DAC before soldering it in.
I got all the SMTs on there.
With the benefit of everyone else's hindsight, I cut three tracks underneath the video DAC before soldering it in.
Re: Smonson's slow H4 build
Nice! - This is partly why I haven't built the second board yet as doing these neater fixes with hindsight as you say makes for a neater board.
I shall probably do the same when I build the second one.
Re: Smonson's slow H4 build
That does look like a good idea. Unfortunately I'd soldered two of my boards at the same time with the SMT stuff
If it ain't broke, test it to Destruction.
Re: Smonson's slow H4 build
Quick question, what is the ROM part? Does the H4 use a "44-pin JLCC JEDEC" compatible pinout?
Re: Smonson's slow H4 build
Thanks @PaulJ. Gosh they're not cheap for a OTP, are they
Re: Smonson's slow H4 build
@Smonson I have used the OTP ones but have also used HN27C4096ACC-10 chips which seem to work fine on stock H4.
https://www.ebay.com.au/itm/1pcs-HN27C4 ... 2103003184
https://www.ebay.com.au/itm/1pcs-HN27C4 ... 2103003184
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: Smonson's slow H4 build
Thanks for that @kodak80, that's much more like what I expected for an old-style EEPROM.
I never cease to be amazed that you can buy 32GB of flash for $10 and yet a chip with less than a meg on it can be the same price or more.
I never cease to be amazed that you can buy 32GB of flash for $10 and yet a chip with less than a meg on it can be the same price or more.