Announcement

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.

#1 2014-11-08 15:37:44

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

Booting Mac Plus right from ROM + some games!

Rob's Site
( Rob's Post on his site )

The Mac Plus (and associated machines) have 1MB of contiguous address space around the ROM, starting at $400000 through $4FFFFF. However, the Plus ROM is only 128K in size. This project is for an adapter to allow a full 1MB ROM plugged into the Mac Plus, and a modified ROM image to utilize the extra space as a ROM disk.

Just got mine from Rob, and really makes the PLUS cool. Boots up instant. Works Great!
- just pop old rom's out
- pop new unit in
- solder the 2 wires from rom to A18 and A19 legs of the cpu
and your all set!

If anyone wants to buy a Mac Plus system, with this mod already installed...
talk to bbraun.  He is desperately trying to get rid of a whole fleet of his Mac Plus machines.
I'm sure his prices are quite fair!

My ROM has - Mac OS 6.0.8 installed and some Games as well!
post-1852-0-40057500-1415422483.png
post-1852-0-82573900-1415422531.png
post-1852-0-54309400-1415422569.png
post-1852-0-57706100-1415422612.png
post-1852-0-57817700-1415422642.png
post-1852-0-00019900-1415422842.png
heck, this rom with an older OS might even work with the Mac 128k
This one here should also work with the 512k.
post-1852-0-57807300-1415423853.png

And for those of you that might have a Vintage Mac,  And no keyboard or mouse?  128k/512k/PLUS
Rob has a solution for that as well
combopcb1.jpg
http://www.synack.net/~bbraun/mackbd/index.html

So with the same adaptor: you can plug in your Standard PS/2 Mouse And keyboard to it.
Not only control any Telephone jack Mac,  But you can control any ADB Mac too!
haha Well you can now Control Both Non ADB mac... and ADB mac all at the same time,  With one ps/2 mouse and keyboard!


Here is a Video of the hacked ROM in action!
Click Here For the Video

Last edited by uniserver (2014-11-08 15:38:38)


#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

Offline

#2 2014-11-08 15:41:53

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Booting Mac Plus right from ROM + some games!

Cool!  I'm glad it arrived and works for you.

Offline

#3 2014-11-08 15:47:35

techknight
Member
Registered: 2014-05-22
Posts: 453

Re: Booting Mac Plus right from ROM + some games!

Yea, I do think its badass IMHO.

I have a plus here myself, but it has a 68030 accelerator that has no manufacturing markings, and for that reason I cant find the drivers so benchmark software reports it as a 68020.

I want that icon.

Last edited by techknight (2014-11-08 15:48:17)

Offline

#4 2014-11-08 16:01:05

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

Re: Booting Mac Plus right from ROM + some games!

Yes, Thanks bbraun hopefully you can Sell some Mac Plus's From this?


#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

Offline

#5 2014-11-08 16:05:53

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

Re: Booting Mac Plus right from ROM + some games!

credit goes to olePigeon for the ICON smile


#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

Offline

#6 2014-11-08 21:05:59

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

Re: Booting Mac Plus right from ROM + some games!

Very cool, I am definitely wanting one of these now - who cares if my plus has a Dead FDD if It can boot off ROM

Time to find out a price smile

Offline

#7 2014-11-09 04:08:04

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Booting Mac Plus right from ROM + some games!

FWIW, here's some updated images for the most recent version of the PS2 adapter:
lastps21.jpg
lastps22.jpg

Offline

#8 2014-11-09 05:33:26

LCGuy
Administrator
From: Sydney, Australia
Registered: 2014-05-13
Posts: 855

Re: Booting Mac Plus right from ROM + some games!

This is really awesome...while there were ADB -> PS/2 adapters available back in the day, they were (and are) big $$$. Pretty cool that you're bringing these to the masses smile

Offline

#9 2014-11-29 17:13:15

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

Re: Booting Mac Plus right from ROM + some games!

Super awesome, just got my second Plus ROM kit from Rob!
it works great and installed just as smooth as the original one.

The only issue is, This Rom kit will not physically fit into a 128k or 512K board.
the spacing is off, The Kit is about 3-4 MM too narrow.

So maybe Rob will have to make a secondary pcb for those boards.

Couple suggestions,
- Add HD20 Init in Rom.
- disable ram check.
- Add AppleTalk support, I think that was originally why "RA" was added because
you need write ability to make a LocalTalk connection?


#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

Offline

#10 2014-11-29 17:21:55

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Booting Mac Plus right from ROM + some games!

Yeah, I discovered the ROM socket spacing issue on the 512k boards...  Kind of unfortunate.
The Plus ROMs shouldn't need the HD20 INIT AFAIK.  It should be able to work with the HD20 without the INIT, I think.
I think I tried making a System 6.0.8 minimal system install with appleshare + appletalk responder, and it was 1K too big for the image, with nothing else installed.  Super sad.  An earlier system would probably fit.

Offline

#11 2014-11-29 17:35:27

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

Re: Booting Mac Plus right from ROM + some games!

Oh haha…  Yes you are right about the Plus having the HD20 init… Duh… sorry.

Icic that is why the Dougg3 simm worked better with that, more room on the simm.

and the ram check disable?

Last edited by uniserver (2014-11-29 17:37:27)


#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

Offline

#12 2014-11-29 18:12:01

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Booting Mac Plus right from ROM + some games!

I haven't looked into the ram check on the Plus rom very machine.  I'm sure it's doable.

Offline

#13 2014-11-29 18:22:24

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

Re: Booting Mac Plus right from ROM + some games!

sounds great… no rush.  Maybe if you get board one day.

was thinking about this kit in a 128k 512K
is there any way we can hack it to make it work?


#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

Offline

#14 2014-12-21 07:43:50

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

Re: Booting Mac Plus right from ROM + some games!

i would just like to say that over at the BMOW Labs,   Steve has came up with an ( application ) that runs on the vintage mac, that will allow you to change the image that is stored in rom --- on the fly…  how cool is that? 

so right now he has it working with the plus…  but this ability with the 128k and 512k … might be really nice! smile
Granted were only talking about 1 megabyte here … Still,  There is a lot of fun to be had, and
the enjoyment of not having to do the 400k floppy shuffle all the time.

- boot from rom, and have your floppy drive free and available, with out all the shuffle smile

post-1779-0-13221300-1419118331.png


#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

Offline

#15 2014-12-21 15:50:28

bigmessowires
Member
Registered: 2014-05-15
Posts: 183

Re: Booting Mac Plus right from ROM + some games!

bbraun wrote:

I think I tried making a System 6.0.8 minimal system install with appleshare + appletalk responder, and it was 1K too big for the image, with nothing else installed.  Super sad.  An earlier system would probably fit.

Sounds like a challenge. :-) The ROM disk capacity is slightly bigger than an 800K floppy disk, so if it's possible to boot a Mac Plus from floppy with Appletalk support, it should be possible to do it with the ROM disk too, no? If pressed for space, maybe delete all the printer stuff from the System folder?

Offline

Board footer

About ThinkClassic

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