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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: F1Lupo on October 09, 2021, 08:13:10 PM

Title: M-Tec E-Matrix 1230-50 (Viper V) jumper settings?
Post by: F1Lupo on October 09, 2021, 08:13:10 PM
Just realized after looking https://bigbookofamigahardware.com/bboah/product.aspx?id=1839 (https://bigbookofamigahardware.com/bboah/product.aspx?id=1839) that my 030@50 doesn't have an oscillator for my FPU and only have one jumper on the 'on/off'...anyone know what Jumpers 1 and 2 are for?
Title: Re: M-Tec E-Matrix 1230-50 (Viper V) jumper settings?
Post by: Matt_H on October 10, 2021, 05:57:14 PM
Did you see this picture (https://bigbookofamigahardware.com/bboah/media/download_photos/ematrix1230_1_big.jpg)?

I would guess that with no FPU oscillator installed that the FPU is synchronous with the CPU. JP1 probably controls whether to use the CPU crystal or FPU crystal.
JP2 is probably a compatibility kludge for RAM above or below a certain ns rating.
And I'd guess JP3 enables or disables either the SCSI controller or the entire board.

Only guesses - maybe someone knows for certain.
Title: Re: M-Tec E-Matrix 1230-50 (Viper V) jumper settings?
Post by: F1Lupo on October 11, 2021, 12:42:04 AM
@ Matt_H

indeed I did but the only disk/info I got when I bought the card new back in early 2000's was the scsi driver. The FPU jumper does make sense if you haver a different speed from your CPU to put the jumper on as it would force it to read the FPU oscillator. The thing I'm confused about is the RAM jumper as I've tried to get more than a few 128 MB ram cards to work with jumper on and off and never got them to work...I currently have a 64MB ram card that works ok with either jumper setting.
update: tried disabling the on/off jumper for the supposed on-board scsi and realized that jumper isn't for the scsi but rather it's too disable the entire card !
Title: Re: M-Tec E-Matrix 1230-50 (Viper V) jumper settings?
Post by: Matt_H on October 12, 2021, 10:47:09 PM
Only other thing I can think of is that maybe JP2 has something to do with FPM vs EDO RAM?