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- Do you remember a few years ago when Commodore brought out the
- A570 CD-ROM drive for the A500? Yes, it was a great device, but there
- was however one flaw to the drive. It only worked on A500's with
- 1Mb oh chip RAM and Kick 1.3 and up. What about users with
- Workbench 1.1/1.2?
-
- Well we have done a bit of work. The A570 will not work under 1.2 <--
- because it needs to autoboot patch in 1.3. Well we have tried to
- use the 570 on our 500 with 1.2 and 512K CHIP 1.5Mb FAST. When we first
- plugged it in we found that the screen would flash black and grey
- over and over. We decided to have a go at getting it to work. So we ripped
- open the 570 and after a few hours of testing and comparing the
- 1.2 and 1.3 versions of the A500 circuit board, we noticed that rev 3 upwards
- had a blue capacitor near the right side of the board and the Rev 2
- and 1 didn't have this, even though there was space for one and tracks
- underneath. We have come to the conclusion that this capacitor does not
- do anything, so soldered one into the 1.2 Amiga's board, and tried again.
- Hey! The Amiga booted up, with the standard 1.2 Boot screen, a hand holding
- a disk with the numbers 1.2 under it. So we inserted a CD called
- Almathera CDPD, which we borrowed from Daniel Wood , the editor of Page.
- Nothing happened, so we inserted the Workbench disk and the Amiga booted
- and Workbench came on AND THE CD WAS ACCESSABLE. Commodore decided that
- they didn't want A500 owners with Workbench 1.2 or lower to use the drive
- so that they would then go out and spend money upgrading to use it
- when they could have used it in the first place! Phew! Commodore
- decided to use the one thing that is not in the old board and they
- did all of that to disallow some users access. The bad thing
- is that most CDTV titles need to Autoboot, and they nearly always need
- 1MB of chip, but if you are just using CDs like hard drives, that
- is CDs like CDPD, that just are utilitiy collections then it is
- fine.
-
- George and Graham Peterson
-