The Sinclair QL Forum

That's correct in inactive state (Bit 0 = 0). When you pull the line high, it should change. It does. When I apply 3.3V to the QLnet pin, the value becomes 57. Let's wait for the BAT43. SInce your test proved that your Q68 FPGA has not been damaged, I would not expect much from replacing the diodes...

I had the same scenario, but a Q60 instead of an emulator and didn't see the problem. IIRC you have a Q60, maybe try it to encircle the issue. Also check if you have hardware handshake off on SER. Yes, I have hardware handshake off on SER. (The communication between Q68 - QPC2 is perfect with SERNE...

is PC.MCTRL a byte long or a word long (peek or peek_w) Byte, as for the original QL. I have checked with nothing plugged and the value of peek(hex("18020")) is 56. That's correct in inactive state (Bit 0 = 0). When you pull the line high, it should change. P.S. something is strange. The ...

afx wrote:But when I access from QPC2 to QL or Q68 resources then the network speed is very very slow.

I had the same scenario, but a Q60 instead of an emulator and didn't see the problem. IIRC you have a Q60, maybe try it to encircle the issue.
Also check if you have hardware handshake off on SER.

In retrospective, I regret that I didn't add the few QL network components on-board. It was a compromise to save the time for an additional prototyping round, and get the Q68 released. (Back then, it was uncertain if someone would do the difficult timing stuff needed for the driver.) I considered de...

Peter, if you are reading this, is it conceivable that although the Q68 works well, the circuitry associated with the network is broken ? Remember that I had an issue that destroyed both my keyboard and SD card a few months ago. That is why I ask if it would be a good idea to monitor the output of ...

Your VCC, GND and QLNET pins on the connector are correct.
Sorry if I ask something too obvious, but are you aware the Q68 network driver is not part of SMSQ/E and needs to be loaded separately?
http://www.dilwyn.me.uk/q68/ndq68_v305.zip

Of course, what could be done as the QL-NET is already a CDMA network protocol is to just encapsulate QL-NET packets within an Ethernet broadcast packet and let the emulators listen to the network for QL-NET packets. That would mean to turn the emulators into something similar to ethernet network s...

Here I see 10ns https://www.digikey.com/product-detail/en/micro-commercial-co/1N5819-TP/1N5819-TPCT-ND/950588 A bit too close to the acceptable speed ? It's fine, you are on the safe side. This requirement is unrelated to the QLNET bit timings. The diode is to protect the FPGA pin from overvoltage ...

However although I ask specifically for a BAT43 diode, I just realize the clerk gave me 1N5819 diodes instead. Equivalent parts ? My problem with the 1N5819 is that I find no specification for the speed yet. The BAT43 is a relatively fast (5 ns) small signal schottky diode, whereas the 1N5819 is a ...