On Tue, 30 Oct 2001 ncoplin@orbeng.com wrote:
> **C64 DIAGNOSTICS**
> This was the main reason I paid more than my usual limit for the carts plus
> shipping. It is an aftermarket EPROM version, 2764 chip. Interesting thing
> though is the cart boots in normal cart mode with EPROM at $8000 rather than
> using the Ultimax mode and switching over. This seemed very strange to me...
> without a kernal ROM working (or installed) it fails to boot. Can anybody
> think why they when this way rather than the Ultimax route and a memory
> register to swap over once booted?
Since it is intended to test ROM, RAM, and I/O, there is no point starting
in the Ultimax mode and then switching.
The complete diagnostic kit includes:
Diagnostic program cartridge
User port hardware adapter (cartridge)
keyboard PCB (basically a loopback connector)
cable harness assembly
(connects both cartridges, serial, cassette, and joystick ports)
diagnostic instruction and troubleshooting manual, #326070-01
The manual is available at agtannenbaum.
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