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#1 2014-12-06 13:15:38

max1zzz
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Registered: 2014-05-18
Posts: 207
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Copying 128k -> Plus ROM's

So I find myself in need of a set of Mac Plus ROM's (To go on one of my 512k boards which is getting a MacGusto Upgrade board) Only problem is I don't have a spare set so I need to burn a new set

My first problem is I'm not sure what the Mac Plus's roms are equivalent to, I know they must be 256k (32Kb) chips, but what series of chips are they from?

Also, dose anyone know if there are any pin compatible modern chips?

And finally a slightly off topic question, dose anyone know how you split dumps from CopyRoms up to burn onto the chips? (from what I understand the chips are interleaved, so one contains the odd bytes and one contains the even ones. But it seems the software for my programmer doesn't have a feature for doing this)

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#2 2014-12-06 14:53:49

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 956
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Re: Copying 128k -> Plus ROM's

well you could just image the roms one by one and burn the same image to the new chip.

I think i have an extra set of plus roms laying around…  also bbraun might be able to hook you up with
a plus rom kit, his price is reasonable! maybe with an image on there that has Mac os6 on it as well ! smile  then you can install that into your plus , freeing up your
stock roms for the 512k.

Last edited by uniserver (2014-12-06 14:55:00)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  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

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#3 2014-12-06 15:08:52

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: Copying 128k -> Plus ROM's

27C512 chips work.  I have a small C program I use for splitting images.

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#4 2014-12-06 16:17:13

max1zzz
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Registered: 2014-05-18
Posts: 207
Website

Re: Copying 128k -> Plus ROM's

Uniserver: That was my plan, Image them separately then burn the two images to two chips.

And I did actually just order one of bbraun's bootable roms, never thought about just swapping the roms from the plus it's going into into the 512k...

Bbraun: Thanks! That's exactly what I needed smile

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#5 2014-12-06 20:39:49

max1zzz
Member
Registered: 2014-05-18
Posts: 207
Website

Re: Copying 128k -> Plus ROM's

Since i'm not too good with anything C I translated it into a simple VB.net Windows Forums program. And it seems to work nicely smile Need to get some eprom chips to test it properly

ScreenShot2014-12-06at20.27.03.png

Last edited by max1zzz (2014-12-06 20:40:07)

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#6 2014-12-06 20:52:57

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: Copying 128k -> Plus ROM's

Cool!  Yeah, my program was just hacked up for personal use, and posted it kinda as it was without getting it ready for anyone else to use, so sorry about that.  But glad you could get something working.

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#7 2014-12-06 21:04:05

max1zzz
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Registered: 2014-05-18
Posts: 207
Website

Re: Copying 128k -> Plus ROM's

Your program was actually quite helpful to me, It showed me what I should be doing with the files. Just I wasn't too sure how to go about executing it (and I can't resist the chance to write something myself smile )

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#8 2014-12-08 00:32:48

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

Re: Copying 128k -> Plus ROM's

super awesome guys.


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  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

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