Den Tue, 31 Oct 2017 23:08:14 -0500 skrev Jim Brain <brain@jbrain.com>: > On 10/31/2017 3:02 AM, Mia Magnusson wrote: > > Sorry if this is an old topic. > > > > Are there any schematics available for Handic VIC-Switch, or some > > similar device? > http://jbrain.com/pub/cbm/hw/VICSwitch/VICSwitch.sch Thank you very much! So what it basically does is that it uses a 3 bit counter that selects each computer connector and as soon as it finds a computer pulling ATN it holds the counter until ATN is released, while the 74138 and 7405 holds DAT low on each not selected computer. Quite clever! I'm not that familiar with burst mode. Would an additional (or actually two in parallell) 4051 for SRQ be enough? How does this play with disk turbos? AFAIK they use CLK and DAT as two data lines so would probably work through this device. IMHO Handic should have sold one unit at a discount price, or even given it away, to each dealer. I remember that in my local shop C64 were demonstrated with 1541 while VIC-20 were demonstrated with datasette. Would had been nice if both had been connected to the 1541. -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2017-11-01 09:00:02
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