After 5 years serving the vintage Apple enthusiast community, ThinkClassic has been marked for closure and is now in caretaker mode. Please see this thread for further information. Please direct any questions, comments and enquiries about the website, management and ownership to this thread.

You are not logged in.

#26 2014-11-30 00:14:34

Registered: 2014-05-29
Posts: 1,064

Re: MacRescue upgrade board

MinerAl: if you could take a look at yours and see what the dip switch settings are for your 6MB version, that'd be awesome.  It looks like the switches just go to GALs, and I don't really have any idea what they're doing.
Mine is 1=on, 2=on, 3=off, and that detects 2.5MB, even if more is installed.  I'm using six 1MB SIMMs.
on, on, on gives me a 0300FF sad mac,
off, on, on gives 0300FF sad mac
off, off, on boots, but detects 2MB RAM
off, on, off boots, but detects 512K RAM
on, off, off gives me just the happymac icon, and the rest is a black screen, even after booting
on, on, off boots, but detects 2.5MB RAM
on off, on gives 0300FF sad mac
off, off, off gives a 03FFFF sad mac


#27 2014-11-30 02:11:52

From: Sf, Mi
Registered: 2014-05-15
Posts: 956

Re: MacRescue upgrade board

its almost acting like a PLUS that needs that ram resistor cut.

#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping


#28 2014-12-02 17:30:45

From: The not-so-great plains
Registered: 2014-08-26
Posts: 73

Re: MacRescue upgrade board

I'll dust it off when I get a chance, but it's finals season here at the high school, so I may be swamped until the holidays.  On the other hand I may decide the MacRescue is more interesting than grading projects, so We'll see smile


Board footer

About ThinkClassic

ThinkClassic specialises in the use, maintenance, repair, restoration and modification of vintage computers and peripherals.