@ Zetr0
Your absolutely right.
"She's the fastest hunk a junk in the galaxy!"
A3640 @ 50MHz! Been there. Done that!
Who would have guessed a MC68040RC25 would go that far?
AIBB benchmarks are with 68030 state machine mod + Ramsey 5 clock cycle @ 25Mhz (380 clock refresh). Also, here are my (CPU nodatacache) Bustest results:
BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
fast $07030000 readw 204.4 ns normal 9.8 * 10^6 byte/s
fast $07030000 readl 204.8 ns normal 19.5 * 10^6 byte/s
fast $07030000 readm 210.1 ns normal 19.0 * 10^6 byte/s
fast $07030000 writew 204.6 ns normal 9.8 * 10^6 byte/s
fast $07030000 writel 205.2 ns normal 19.5 * 10^6 byte/s
fast $07030000 writem 204.6 ns normal 19.5 * 10^6 byte/s
BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
rom $00F80000 readw 251.7 ns normal 7.9 * 10^6 byte/s
rom $00F80000 readl 251.1 ns normal 15.9 * 10^6 byte/s
rom $00F80000 readm 246.8 ns normal 16.2 * 10^6 byte/s
P.S. Don't even think about trying this without a clock doubler circuit or something faster than the 74Fx803 if you prefer clock dividers. You also need 68030 state machine mod for a 1/2x clocked motherboard or apollo630's 2x clock GAL hack.
Here is the link for images and downloadable files:
http://eab.abime.net/showthread.php?p=777332
Your absolutely right.
"She's the fastest hunk a junk in the galaxy!"
A3640 @ 50MHz! Been there. Done that!
Who would have guessed a MC68040RC25 would go that far?
AIBB benchmarks are with 68030 state machine mod + Ramsey 5 clock cycle @ 25Mhz (380 clock refresh). Also, here are my (CPU nodatacache) Bustest results:
BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
fast $07030000 readw 204.4 ns normal 9.8 * 10^6 byte/s
fast $07030000 readl 204.8 ns normal 19.5 * 10^6 byte/s
fast $07030000 readm 210.1 ns normal 19.0 * 10^6 byte/s
fast $07030000 writew 204.6 ns normal 9.8 * 10^6 byte/s
fast $07030000 writel 205.2 ns normal 19.5 * 10^6 byte/s
fast $07030000 writem 204.6 ns normal 19.5 * 10^6 byte/s
BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
rom $00F80000 readw 251.7 ns normal 7.9 * 10^6 byte/s
rom $00F80000 readl 251.1 ns normal 15.9 * 10^6 byte/s
rom $00F80000 readm 246.8 ns normal 16.2 * 10^6 byte/s
P.S. Don't even think about trying this without a clock doubler circuit or something faster than the 74Fx803 if you prefer clock dividers. You also need 68030 state machine mod for a 1/2x clocked motherboard or apollo630's 2x clock GAL hack.
Here is the link for images and downloadable files:
http://eab.abime.net/showthread.php?p=777332
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