Silvester wrote:Derek_Stewart wrote:There was however failures due user intervention, after removal of the CPU heatsink to look at the CPU serial number. This was detailed in QL Today, who never contacted me to establish if this was correct.
What sort of heatsink did you use on Q60?
BTW did anyone ever try using 68060/ 68040 adaptor on Q40? (
https://amiga.technology/2021/01/18/680 ... formation/)
Hi,
I have some PCBs for the 68040 to 68060 which I was going use them on a QXL 2, which uses a 50Mhz Oscillator. The 68040 reduces the clock speed by 2, fitting a 68060 removes the half speed reduction of the 68040. I hoped to use a 68060RC50A so that it would run at full speed of 50 Mhz. I did not complete this, as the Q68 got in the way.
Maybe this msy not work as there mighg be problrms with SMSQ/E. When I have time, I complete the build and fit a 68060 to my 4 QXL Boards.
Silvester wrote:Peter wrote:
The Q40 mainboard is already prepared for 68060. It just requires the extra CPU pin headers and a 3.3V voltage regulator to be placed. And a different oscillator, if it is going to be a 66 MHz machine, rather than 80 MHz.
https://www.ebay.co.uk/itm/162502659921 suitable ?
That 68060 is an EC version, which does not gave a FPU or MMU, the Q60 use the RC 68060 with FPU and MMU.
Indcidently, the QXL used a EC 68040, no FPU or MMU, but fitting a RC 68040 the QXL runs okay, with FPU and MMU available, but SMSQ/E does not need this.