Re: [ql-users] QXL RAM
Dave P and Phoebus Dokos wrote: My question is regarding an overclocked QXL. Mine is currently at 33MHz but my 68040 is for 40 (therefore an 80 MHz crystal could be installed) but I do not know if the ram could take that! 70ns FPM memory will support 50 or 60MHz bus speeds with ease. If it's only running at 40MHz I would anticipate a large reduction in heat output and current drawn. 70ns should be fine for 33MHz. The problem here is not really the RAM but the GLUE chip on the QXL - it's already 'cheating' even at 20MHz, and uses passes through it's logic array to generate delays for RAM timing. As bus speed increases, differences from one GLUE to the next and differences in operating temperature make the timings more and more crytical, 60ns RAM just gives added leeway for timing mismatches courtesy of the GLUE chip. N. ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] QXL RAM
Don't know the answer, but looks like Phoebus's daughter has been at work again! Dilwyn Jones From: Phoebus Dokos [EMAIL PROTECTED] Date: 2004/11/21 Sun PM 04:11:57 GMT To: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: [ql-users] QXL RAM Hi all, to bother the list once more with a rather simple question (which I hope someone will answer) Does anyone know if 514400-70 will function properly with my QXL (Which is clocked at 33MHz coincidentally)? Also does anyone know what's the correct placement of ZIP Rams to have the QXL at 4 Megs instead of 8? Phoebus -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] QXL RAM
Mon, 22 Nov 2004 15:40:08 +,() [EMAIL PROTECTED] /wrote: Don't know the answer, but looks like Phoebus's daughter has been at work again! Dilwyn Jones Nahh I just found dirt cheap brand new ones that are 70ns unfortunately ;-) Phoebus ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] QXL RAM
On Mon, 22 Nov 2004, Phoebus Dokos wrote: Nahh I just found dirt cheap brand new ones that are 70ns unfortunately ;-) How is 70ns a problem? That is well in excess of timing requirements for a QXL, isn't it? Dave ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [ql-users] QXL RAM
On Mon, 22 Nov 2004, Phoebus Dokos wrote: My question is regarding an overclocked QXL. Mine is currently at 33MHz but my 68040 is for 40 (therefore an 80 MHz crystal could be installed) but I do not know if the ram could take that! 70ns FPM memory will support 50 or 60MHz bus speeds with ease. If it's only running at 40MHz I would anticipate a large reduction in heat output and current drawn. Dave ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
