Re: Pet64 DOA

On Fri, Dec 10, 2010 at 10:19:08PM +1300, matt wrote:
>can i see some pix.
>is it a pet or c64???

The PET64 a.k.a. 4064 a.k.a. EDUCATOR64 is a Commodore 64 in a PET case, 
for use in schools. George Page used to have one.  Does Bo Zimmerman 
know where it is now?

At http://zimmers.net/anonftp/pub/cbm/pictures/gpage2/gpage2.html is 
George Page's description that I formatted in HTML in 1994 or 1995:

>11, 12, 13: A 4064 (Educator 64 in a standard large PET case) and a 
>SuperPET (SP9000). 12 shows the switches on the side of the SP that 
>switched between ROMs and also write-protected memory.
>
>The Educator was designed for school use, and used primarily 
>refurbished C64 boards that had been returned to Commodore as defective 
>or "sparkily". It came in both this style case, and a standard 64 style 
>case. More-or-less crammed into whatever CBM had on hand and could sell 
>to schools. The sound (SID), color, and sprites were disabled. '82/'83.  
>[William Levak points out that according to other sources, the SID chip 
>was indeed present in the Educator 64, but there was no loudspeaker in 
>the system.]
>
>[Editor's note: The Educator 64 uses a slightly modified KERNAL ROM 
>that omits the "38911 BASIC BYTES FREE" message and changes the screen 
>colors to black and white.]

Best regards,


When I maintained the Commodore archive at FUNET that is now available 
at http://zimmers.net/anonftp/pub/cbm/firmware/computers/c64/
I wrote the following:

>kernal.4064.901246-01.bin
>This 8-kilobyte ROM has been reported in various machines (4064, PET64, 
>EDUCATOR64), which are versions of the Commodore 64 built in a PET case 
>with an integrated monochrome monitor. The system interrupt routine 
>resets sprite, background and border colors to black unless the 
>high-order bit of the location 646 (cursor colour, $0286) is set. Using 
>any colour command resets location 646 and, therefore, the colors.

I hope that this helps, maybe even in the troubleshooting. :-)

	Marko

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