SuperMac Spectrum can’t enable acceleration

[Lycus]

Hello, I just bought a Supermac Spectrum card, and I can’t figure out how to get acceleration enabled. It’s greyed out in the control panel, the card is powered by a TMS34061
It has a 1987 copyright date on it. 768KB RAM on the card.

Oddly enough the card says it is a Spectrum, no numbers. 1.9.1 ROM.

 

[Unknown_K]

Have a picture of the card and what the ROM revision is plus the OS you are using?

There are a few different revisions of the Spectrum brand.

 

[Lycus]

Have a picture of the card and what the ROM revision is plus the OS you are using?

There are a few different revisions of the Spectrum brand.

The OS is 7.5.3, ROM 1.9.2

Card I can’t find a picture of anything like it besides mine.

 

[Unknown_K]

That card is old as dirt and pre accelerated video I would think.

 

[Lycus]

That card is old as dirt and pre accelerated video I would think.

I would think that except for the fact that it has a TMS34061 on it, also was sold to me as accelerated.

I have a Radius 8 bit accelerated card somewhere but it has lines down the screen, I think it's got bad RAM, and it's ZIPP so that's extra fun.

 

[Unknown_K]

Did you install any earlier drivers? Before 2.7.5 the software had a separate control panel and Accelerator INIT and that would interfere with 2.7.5.

 

[Lycus]

Did you install any earlier drivers? Before 2.7.5 the software had a separate control panel and Accelerator INIT and that would interfere with 2.7.5.

I did not. Only used 2.7.5
I pulled out my Radius card and it’s doing this

RAM issue?

 

[Unknown_K]

I think you needed a programmable DSP for acceleration on Nubus cards.

 

[Unknown_K]

I did not. Only used 2.7.5
I pulled out my Radius card and it’s doing this

RAM issue?

Are the chips socketed? If not look for a cracked solder joint or maybe a broken off capacitor.

 

[Lycus]

Are the chips socketed? If not look for a cracked solder joint or maybe a broken off capacitor.

No sockets, I’ve reflowed the card before and no fix

 

[Bolle]

That card is not accelerated. Only the later SuperMac cards that used ASICs supported acceleration.
The TMS34061 does not support any pixel operations, it’s just a „dumb“ framebuffer controller.

 

[Lycus]

That card is not accelerated. Only the later SuperMac cards that used ASICs supported acceleration.
The TMS34061 does not support any pixel operations, it’s just a „dumb“ framebuffer controller.

Awesome. Thank you. I know the TMS34020 and stuff is actually a CPU so that’s why I got confused.
So I’ll have to fix my Radius

 

[Bolle]

TMS34020

Yep, that’s a totally different beast. I’ve got two Formac Nubus cards with one of those on them and they allow for QuickDraw acceleration.

Side fact: the hardware acceleration in Marathon only works with the specific video chipset in the LC/Performa 630 as far as I know. No other Mac and no Nubus card supported that.

 

[Lycus]

Yep, that’s a totally different beast. I’ve got two Formac Nubus cards with one of those on them and they allow for QuickDraw acceleration.

Side fact: the hardware acceleration in Marathon only works with the specific video chipset in the LC/Performa 630 as far as I know. No other Mac and no Nubus card supported that.

I thought it was just 1.0 that was like that but 1.2 allowed QuickDraw