Re: Transfer 8050 disks

From: Ernie Chorny <chorny_at_tamcotec.com>
Date: Wed, 02 Dec 2009 10:13:44 -0500
Message-ID: <4B168428.2020409@tamcotec.com>
There were also custom PROMs for Paperclip and CalcResult and I believe 
others. Some of these competed for the same address space which lead to 
the development of ROM switchers- I have a couple of different types 
which could hold 3 different ROMS. These were accessed through a small 
external switch cabled to the switcher.

In the Toronto Ontario area, Visicalc was "deROMMED" early in the game 
and the unprotected version circulated widely.

Ernie

Richard wrote:
> In article <008501ca6f37$b5b590a0$1e04a8c0@ad.mediawebbsupport.se>,
>     "Anders Carlsson" <anders.carlsson@sfks.se>  writes:
>
>   
>> [...] Interestingly enough almost all of them origin from 
>> earlier PET 3000 and 8000 versions, on which there was no cost effective way 
>> to create dongles, thus the business software on the PET side seemed 
>> completely unprotected?
>>     
>
> VisiCalc for the CBM 8032 was protected by a custom PROM you placed
> into one of the empty sockets on the motherboard.
>   
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Received on 2009-12-02 16:00:04

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