Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Anything QL Software or Programming Related.
Derek_Stewart
QL Wafer Drive
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Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Postby Derek_Stewart » Tue Jun 02, 2020 4:46 pm

Hi,

The modification to the Q68 case is major change.

The holes for the QLAN sockets are drilled 6mm Dia. With 8mm counter-drill on outside to accommodate the socket securing nuts.

Internally, a small section of the top 2 upper fixed metal rails is removed, to allow the sockets to be mounted and secured as detailed above.

The position of the QLAN sockets is on the right-hand side of case looking from the front and 30mm from the back giving enough clearance for the VGA Socket.

The installation of the twin network QLAN sockets require the Q68 programming socket to be replaced with a 90 degree header, this allows the Q68 PCB to slid into the case without contacting the QLAN circuitry, which is constructed inline with the wiring and shrink wrap insulated.

I fitted a male expansion header and connected the QLAN circuitry wiring to the correct pins, using the two 2x2mm connectors.

All new Q68 boards will have an male expansion port header fitted.


Regards,

Derek
afx
Brittle Membrane
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Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Postby afx » Tue Jun 02, 2020 8:57 pm

Hi, Peter.

Peter wrote:Did you try your Q60 instead of QPC? I can not see the same effect there (but my Q60 installation is rather old).

Unfortunately I don't have Q40/Q60 ... :-( ... (By the way, are Q60 units still being manufactured?).

Peter wrote:Which baudrate are you using? 115200 Baud here.

Yes, I use 115200 baudrate.

Peter wrote:Are you using a USB-Serial converter for the PC? In that case, all kinds of odd slow-downs are possible depending on timings and bad luck. Better use a decent serial card directly on PCI/PCIe.

I'm not using usb to rs232 adapters. My PC motherboard has a built-in RS232 port.

Best regards.


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Peter
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Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Postby Peter » Wed Jun 03, 2020 12:57 pm

afx wrote:Unfortunately I don't have Q40/Q60 ... :-( ... (By the way, are Q60 units still being manufactured?).

Sorry, I thought you had one. There is a slow-going effort to build a few Q60 from leftover parts, but I see no predictable outcome yet.

The sad thing about the Q60 ist that almost no flatscreen monitors can decode the screen resolution correctly. Otherwise, a remake would make more sense.
The OSSC video converter was reported to give acceptable Q60 results, but is more expensive than a whole Q68, and makes the overall setup quite clumsy.

I keep considering a totally new '060 machine, the effort would be not much higher than solving the video issue. But a huge effort.
My motivation for so much work is limited, because the machine can not be as fast as emulation today.
Also, the CPU would make it less QL-compatible than the Q68.


Derek_Stewart
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Location: Runcorn, Cheshire, UK

Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Postby Derek_Stewart » Wed Jun 03, 2020 4:29 pm

Hi,

Peter wrote:There is a slow-going effort to build a few Q60 from leftover parts, but I see no predictable outcome yet.

These Q40 boards and parts were the old stock left over from the Q-Branch production, given to me by Tony Firshman. The boards all had construction faults, mainly down to bad soldering techniques, by persons unknown.

I think it would be better to make more PCBs and start from new, as tgere were no failures on the Q60 boards produced.

I have been given 2 of my old production Q60 boards to resale, but one Q60 has problems with the CPU been heat damaged.

This I think happened due an article in QL Today, describing problemms with a certain 68060 CPU version. To establish the correct CPU version, the heat has to removed. The heat sink looks to of been replaced on the 68060 incrrectly and the CPU overheats after more than 30 minutes.

Another Q60 sent back for reoairs has the same fault, the CPU heat sink was loosely placed on the CPU, in this CPU failure.

I just all these "so called experts" would not do this type thing, as 68060 COU are still available, but at a price and also there is a risk of fraudulent CPUS.

While a working Q60 is a wonderful machine, a Q68 is better, in that the display is more up to date, which was the limiting factor of the Q60. The Q68 is more compatiable with older existing QL software.

Peter wrote:The OSSC video converter was reported to give acceptable Q60 results, but is more expensive than a whole Q68, and makes the overall setup quite clumsy.

The OSSC looks a good solution, to the video display but very expensive. However the OSSC designs are oen source, I think a cheaper version could made...


Regards,

Derek
afx
Brittle Membrane
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Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

Postby afx » Sat Jun 06, 2020 7:00 pm

Peter, Derek, ... thank you for clarifying the status of Q60.

From what you say, it seems that the evolution of Q68 is a better strategy. A Q68 version 2 with better speed, especially in high resolution graphics, could be a very good alternative.

Best regards.



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