Re: Weird behavior of C64 IEEE interfaces

From: Anders Carlsson (
Date: 2006-07-25 11:12:52

On Tue, 25 Jul 2006, wrote:

> VIC-1112's, the IEEE interface for the VIC-20. [..] The onboard ROM
> is situated at $B000 so auto-start was impossible anyway. I tried
> SYS 54056 (= 11*4096) but the VIC freezes completely.

As I suggested on Denial, have you confirmed if the 6522 VIA chips
in this type of interface are OK? While I don't have a VIC-1112, I
checked how the IEEE interfaces I have act without its VIAs. It
started up fine with SYS 45056 (typo above). Trying to access the
drives made the VIC-20 lock up though.

Does there exist a ROM dump of the 1112, in case the start address
is different than the first byte of the ROM?

Anders Carlsson

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