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Author Topic: Classic Bus overclocking?  (Read 1012 times)

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Offline Oldsmobile_Mike

Re: Classic Bus overclocking?
« on: September 29, 2016, 11:08:27 PM »
Quote from: QuikSanz;814612
I'm curious, Can a ZII bus be doubled if if not using a Toaster. What may be the pitfalls of this. There must be some way to increase bandwidth to give lets say a Vampire better performance. A graphics card could benefit.

Chris

Vampire sits in the CPU slot on an A2000, or in the CPU socket if you can cram it underneath the drive sled.  It doesn't use a Zorro II slot.

Don't know about overclocking the bus, I think you're hitting limitations on the old Buster chip in the A2K (as well as probably numerous other components); it never had any revisions or updates like the A3K/A4K Buster chip did for improved performance.  :(

See pic of Vampire installed in A2000 that I copied off Google+ a few days ago:
« Last Edit: September 29, 2016, 11:11:56 PM by Oldsmobile_Mike »
Amiga 500: 2MB Chip|16MB Fast|30MHz 68030+68882|3.9|Indivision ECS|GVP A500HD+|Mechware card reader + 8GB CF|Cocolino|SCSI DVD-RAM
Amiga 2000: 2MB Chip|136MB Fast|50MHz 68060|3.9|Indivision ECS + GVP Spectrum|Mechware card reader + 8GB CF|AD516|X-Surf 100|RapidRoad|Cocolino|SCSI CD-RW
 Amiga videos and other misc. stuff at https://www.youtube.com/CompTechMike/videos
 

Offline Oldsmobile_Mike

Re: Classic Bus overclocking?
« Reply #1 on: September 29, 2016, 11:27:21 PM »
Quote from: QuikSanz;814615
I was thinking the rest of the chips may not handle this but this could reduce the "bottleneck" if it can be done.

Pretty sure you'd get better performance using the onboard video of the Vampire board than any Zorro II graphics card.  Zorro II slots are still useful for legacy SCSI boards/peripherals, sound cards, networking, etc., though.  ;)
Amiga 500: 2MB Chip|16MB Fast|30MHz 68030+68882|3.9|Indivision ECS|GVP A500HD+|Mechware card reader + 8GB CF|Cocolino|SCSI DVD-RAM
Amiga 2000: 2MB Chip|136MB Fast|50MHz 68060|3.9|Indivision ECS + GVP Spectrum|Mechware card reader + 8GB CF|AD516|X-Surf 100|RapidRoad|Cocolino|SCSI CD-RW
 Amiga videos and other misc. stuff at https://www.youtube.com/CompTechMike/videos
 

Offline Oldsmobile_Mike

Re: Classic Bus overclocking?
« Reply #2 on: October 03, 2016, 06:12:43 PM »
Quote from: SpeedGeek;814701
because Super Buster is a downgrade for Zorro-II users.

Out of idle curiosity, how is it a downgrade?  Is it because of all the DMA issues in the various revisions of the chip?
Amiga 500: 2MB Chip|16MB Fast|30MHz 68030+68882|3.9|Indivision ECS|GVP A500HD+|Mechware card reader + 8GB CF|Cocolino|SCSI DVD-RAM
Amiga 2000: 2MB Chip|136MB Fast|50MHz 68060|3.9|Indivision ECS + GVP Spectrum|Mechware card reader + 8GB CF|AD516|X-Surf 100|RapidRoad|Cocolino|SCSI CD-RW
 Amiga videos and other misc. stuff at https://www.youtube.com/CompTechMike/videos