Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: joekster on July 25, 2011, 03:09:47 PM

Title: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: joekster on July 25, 2011, 03:09:47 PM

This one has really stumped me! The manual for the CSA-MMR states that it will work in an a1000... I have two CSA-MMRs, and both work perfectly in my A500. I have two A1000s - one rev A, one rev6. Both A1000s work perfectly with a TRR/Saphire (020). With the CSA-MMR jumpered to 68000, all is good. Jumpered to 030, just a black screen - no kickstart prompt...

Any ideas???

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: save2600 on July 25, 2011, 04:08:47 PM

I am pretty sure you need Kickstart in ROM in order for that accelerator to work in an A1000...

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: joekster on July 25, 2011, 07:22:29 PM

I guess its possible I need a full kickstart rom... I would have thought that if the boot/kickstart loading roms would work with an 020, it would be fine with an 030.

Has anyone run a CSA-MMR and/or any 030 on an A1000 with disk-loading kickstart?

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: benb123 on September 29, 2011, 03:55:58 AM

Hi joekster,

I have the same problem. I have the mega midget and the daughterboard that work in an A500 but I can't get anything but a flashing power light on the A1000 I have (works normally of course). The manual says it should work.

I experimented supplying the 5V and GND from the floppy connector to the plug near the front of the A1000 on the mega midget in case it wasn't making its way through the 68000 connector but this made no difference.

Cheers,

Ben

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: joekster on September 29, 2011, 12:16:40 PM

I though I would get cute...
1. Jumpered csa-mmr to 68k
2. Loaded kickstart from disk
3. Jumper csa-mmr to 030
4. Ctrl-A-A
Didn't boot in 030 :( ...
Maybe my timing of steps #3,4 was off???
Maybe you can't switch from 68000 to 030 in this manner???
Maybe the CSA-MMR just doesn't work in an A1000 (despite what the manual says)???

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: benb123 on September 30, 2011, 02:13:05 PM

I think you may be close. I was reading the manual and it hinted that the CPU was software selectable.

The software for it is here:

http://www.l8r.net/install/accel/csamegamidget.DMS

Booting the disk into Workbench there is a CSA folder with a Switch_CPU tool in it.

I am wondering if you kept the CPU jumpered to 68K on boot, loaded the Kickstart (1.3 so set that jumper for 256K mode to be safe), then switched using the software to 68030 mode? Perhaps that might work? Or remove the jumper then use the software?

I will try this at some stage but I am just getting my A1K set up and put the floppy back in so the MMR won't fit right now. I have it booting from a 2GB compact flash in an A590 (powered from the A1K). I also managed to get it booting 2.04 (and 3.1 tomorrow perhaps) using mkick from aminet. When I get another couple of compact flash cards (in the mail) I want to have a 1.3, 2.04 and 3.1  booting on separate cards.

I anxiously await your experimentation Joekster. 8-)

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: joekster on October 01, 2011, 02:35:22 PM

It sounded so good, but doesn't work :( . The utility only switches from 030 to 68000 mode. I tried it and read the manual. If you run it from 68000, the utility does nothing...

I'm begining to think the CSA-MMR is just incompatible with the a1000.

Title: Re: CSA Mega Midget Racer on A1000 - what am I doing wrong
Post by: benb123 on October 07, 2011, 02:25:56 PM

Bummer. Oh well, I am still hoping it is the ROM issue because that at least has a work-around e.g. http://lab.amigalounge.com/A1000_ROM.html

Thanks for your efforts joekster.