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touko · 14 June 2018, 07:18

1) the chipram is a 280ns DRAM,you can find this information easily .
2) the fastest chips(blitter,copper) are accessing to this RAM ,1 word every 2 cycles(to be easily interleaved with the 68k's 4 cycles of acces time) at 7.16 mhz, which confirm the first point .

For the SRAM in the archie,i have read this information on a tec note, but in don't remember where !!.
So until i find this information i trust you, but i don't remember to have read any refresh time on the archie's tec docs .

EDIT: You were right, it use DRAM,i saw it in the VIDC's techdoc,but it's more than twice as fast than amiga one .

14 June 2018, 07:18	#170
touko Registered User Join Date: Dec 2017 Location: france Posts: 186	1) the chipram is a 280ns DRAM,you can find this information easily . 2) the fastest chips(blitter,copper) are accessing to this RAM ,1 word every 2 cycles(to be easily interleaved with the 68k's 4 cycles of acces time) at 7.16 mhz, which confirm the first point . For the SRAM in the archie,i have read this information on a tec note, but in don't remember where !!. So until i find this information i trust you, but i don't remember to have read any refresh time on the archie's tec docs . EDIT: You were right, it use DRAM,i saw it in the VIDC's techdoc,but it's more than twice as fast than amiga one . Last edited by touko; 14 June 2018 at 08:28.