Overclocking BVision

[Cosmos Amiga]

80 < Meltdown < 100


Meltdown
 jsr -$60(a6) ; R_FindToolType (a0/a1) (d0)

 move.l d0,a3
 tst.l d0

 beq.b JL_0_12C6
 moveq #0,d7

 bra.b JL_0_1290

 JL_0_127C
 moveq #0,d0

 move.b (a3)+,d0
 move.l d7,d1

 asl.l #2,d1
 add.l d7,d1

 add.l d1,d1
 add.l d0,d1

 move.l d1,d7
 moveq #$30,d0

 sub.l d0,d7

JL_0_1290
 move.b (a3),d0
 moveq #$30,d1

 cmp.b d1,d0

 bcs.b JL_0_129E
 moveq #$39,d1

 cmp.b d1,d0

 bls.b JL_0_127C

JL_0_129E
 move.l d7,d0
 asl.l #6,d0

 sub.l d7,d0
 move.l d0,d1

 asl.l #5,d1
 sub.l d0,d1

 asl.l #3,d1
 add.l d7,d1

 asl.l #6,d1

 beq.b JL_0_12C6          ; nop = $4E71
 cmpi.l #$04C4B400,d1   ; nop = $4E71,$4E71,$4E71

 bcs.b JL_0_12C6          ; nop = $4E71
 cmpi.l #$05F5E100,d1   ; nop = $4E71,$4E71,$4E71

 bhi.b JL_0_12C6           ; nop = $4E71

 move.l d1,$34A(a5)      ; now with the nop => no check anymore

JL_0_12C6



The goal is to remove < 80 and > 100 Mhz checking !

I'm good with my nop ?

Other coders, please confirm ($04C4B400 = 80 Mhz and $05F5E100 = 100 Mhz)

[delshay]

WARNING!

if a modifyed driver is used for Bvision/Cvision  users must not overclock their cards without proper cooling as this will overheat and destroy the card.


WARNING!

[Piru]

I'm good with my nop ?

Yes, but I wouldn't remove the checking, but rather change the limits. Removing it completely makes it possible to totally hose the system by entering bogus values by accident.

Ah btw, this hack won't work with Permedia 2V, if that's what you're using.

Also, it goes without saying that the limit is there for a reason. Do NOT try to go above 100 unless if you know exactly what you're doing. For my phase5 BPPC >96 locked up quickly, even when actively cooled.

[delshay]

Yes, but I wouldn't remove the checking, but rather change the limits. Removing it completely makes it possible to totally hose the system by entering bogus values by accident.

Ah btw, this hack won't work with Permedia 2V, if that's what you're using.

Also, it goes without saying that the limit is there for a reason. Do NOT try to go above 100 unless if you know exactly what you're doing. For my phase5 BPPC >96 locked up quickly, even when actively cooled.

EDIT


my card works perfect @100Mhz i left it on with Heretic II running overnight no lock-ups with Blizzard clocked @334Mhz 83Mhz bus.
060@73Mhz


PM on it way.

[delshay]

this project has started again but im looking for two or three faulty Bvision cards to continue this project as i only have one remaining TEST BVISION CARD left.

in the next few hours i will post my findings what the Bvision can do over 100Mhz ( if any ).

[delshay]

Bvision sets a new world record over 100Mhz,but it just a little improvment it`s going to need to improve a lot more.

over the next two or three months i will be looking to see if i can get more speed out of the card.

[the_leander]

send me in your hardware to experiment on and i have no problems in releasing information
to all users. beware your hardware will not be the same if you want it to be returned.

all experiment/testing cost money and time and i need to see some kind of return for my work.

Given your Vesuvius like nature, I think anyone should think long and hard before

A; giving you hardware and b; giving you their address.

[Piru]

Bvision sets a new world record over 100Mhz,but it just a little improvment it`s going to need to improve a lot more.

over the next two or three months i will be looking to see if i can get more speed out of the card.

One could ask what's the point with all this... There are better solutions for running W3D stuff than Permedia2.

[delshay]

Given your Vesuvius like nature, I think anyone should think long and hard before

A; giving you hardware and b; giving you their address.

if you have nothing positive to say why don`t you **** off and stay out my thread.