Yes, the switch position should be selected before powering on. The so called "Turbo-switch" has 3 wires and 2 static positions (1-2/2-3). For the original ROM Selector on Q40, we need only the (2-3) position, the other position should be open. So, the wire 1 should not be connected. Thanks Dave, Derek.
-----Message d'origine----- De : Ql-Users [mailto:ql-users-boun...@lists.q-v-d.com] De la part de Peter Graf Envoyé : vendredi 5 mai 2017 21:45 À : ql-us...@q-v-d.com Objet : Re: [Ql-Users] Turbo switch-bouton history No. Alain wants to use the turbo switch, not the reset button. Am 05.05.2017 um 19:37 schrieb Dave Park: > As the reset button is momentary, it will also take a bistable > flipflop like a 7474... > > When I get back, I'll do you a little circuit. :) > > Dave > > On Fri, May 5, 2017 at 7:58 AM, <pg...@q40.de> wrote: > >> On 5 May 2017 at 14:47, Alain HAOUI wrote: >> >>>> You'd have to bend one pin of each EPROM, so they don't connect to >>>> the >>> socket. Then connect both bent pins by wire with turbo switch and a >> pullup. >>> (The onboard ROM selector jumpered to "Normal Operation".) >>> >>> This sounds promising. Not afraid. Pins number please. Thanks >> >> Depends on size. Why not look into EPROM datasheet yourself? Simply >> the highest addressline you've got. >> >> Peter >> >> _______________________________________________ >> QL-Users Mailing List _______________________________________________ QL-Users Mailing List _______________________________________________ QL-Users Mailing List
