Mother board revision is : CA400329à GX 211 VO 3489 TOS 1.62 With v5.0a & Gemdrive Not detected at all

[p0ke]

Hello,

I have the latest PCB design and the original bluepill one, both works more or less like a charm but on one of my atari, the one I use, it is not detected at all (motherboard CA400329à GX 211 VO 3489 ). I wait lot of time, 2 leds flash up (orange and red), and never shutoff, while atari is taking lot of time before showing up with A & B drive icon on desktop. I have been doing couple of hardware check on Atari :

• I tested the HDD port with multimeter : no issue
• I tried to switch with another DMA from an Atari that works : same results
• I Tried another 74LS245N (the one in front of the port) : same results
• I Tried HDD diagnostic tools but those never found the device.

I don't know what I can do next. It is like it does not exists at all.

I'm quite noob on this project. I don't know how to debug acsi2stm hardware. I have USB UART device I could plug (and I did but got nothing in monitor from the arduino board).

Any help would be much appreciated.

Thanks

[p0ke]

Could someone tell me what makes turn off orange led ?

[p0ke]

Have been setting up the device in debug mode. It says "-> Waiting for the ACSI bus ..." I will try to tweak the firmware, and search hardware issue.

[Biker1bob]

This is the same issue I was having. I found it is the square pin headers we use now. The port connection is not the best. Try some isopropyl into the port.. maybe some dielectric grease (improves connection) I have had this on one or two machines where round pin devices work perfectly.