The Sinclair QL Forum

Hi
I have replaced IC 21 today and all is good and now working fine It is a shame that I did not replace it before I ordered the replacement ram but it might come in useful in the future.
I would like to thank all those who have took the time to try and help me I would not have been able to get it ...

Hi,

Not quite Today, but only time I had to look and use it:

DRAM Tester, tests: 256K/32K/16K DRAM chips:

DRAM_Tester.jpg


available from Faceboook:

[Search for Dram tester in the Electronics section on Facebook Market place

A bit of a risk, but there reliable traders around, even on ...

Hi,

Sorry, for the bad grammatical errors in my last message. I should not enter messages on mmy mobile phone. A case of big fingers and little screen keyboard.

But I intended to say, I had a HP 14" Laptop, that I have a VGA to TFT screen adapter, so the Q68 could display to the Laptop TFT screen ...

Hi Martyn

Some DOM need power, maybe adding a power supply to the DOM will help.

What is the make and model of the DOM?

You could try inserting the DOM into a PC IDE port, and use the Windows or Linux diagnostics to see if there is any problems.

The Q68 found be put I yo this sort thing just need a VGA to TFT Screen adapter.

I was going to this in a an old HP laptop, but thought there would be much demand for this type of thing...

Hi,

The transistor next to the 8049 on all my issue 5 QL boards are the same as I the picture.

Just make sure the legs are not shorting out.

Hi Martyn


The error message FAT problem means there is no Qubide Partition table on the drive.

On nee drives of say 1Gb, I use this process:

100 REMark Unlink all WIN Drives
110 WIN_DRIVE -1
120 :
130 REMark Set Format to Write,Format Quick,No Confirmation, No Verbose
140 REMark Block Size=4 ...

HI,

Here is my unfinshed update to the QL Service manual, which details Fault Finding in Section 2 and I have added Tonty Firshman's Fault Finding process in Section 6.

I must state I have a lot of work to do to complete the drawings of the QL circuit board.


QLSM04.pdf


The details of the ...

I am not sure if SCRAP is present till QPAC2 is loaded. The Scrap extension is part of Jochen's Menu-extension. The scrap menu is synchronized with the Windows clipboard using QPC_SYNCSCRAP.


HI Ralf,

Thank you, for the clarification, so the definition of Extended Environment should include ...

Hi,

The source code to C68 is available, could that be enhanced to produce reentrant code?