On 12/28/2017 12:09 PM, Francesco Messineo wrote: > On Thu, Dec 28, 2017 at 11:09 AM, Gerrit Heitsch > <gerrit@laosinh.s.bawue.de> wrote: >> On 12/28/2017 10:53 AM, Francesco Messineo wrote: >>> >>> On Thu, Dec 28, 2017 at 10:31 AM, Gerrit Heitsch >>> <gerrit@laosinh.s.bawue.de> wrote: >>>> >>>> On 12/28/2017 09:00 AM, vossi wrote: >>>>> >>>>> >>>>> The 6540 need a clock. It doesn't wok with a0 or static input. >>>> >>>> >>>> >>>> It should work with A0 from the programmer connected to the clock input >>>> and >>>> A0 from the ROM connected to A1 from the programmer. A1 to A2 and so >>>> forth. >>> >>> >>> That's what I think too. I'll discover it in a few days anyway :) >> >> >> If it doesn't, try inverting A0 before feeding it into the clock input. > > hm? Why should it matter, other than for adding a delay? It depends on how the prommer sets up the address lines and if there is a address latch inside the ROM involved. I have a few SRAMs that are 2114 compatible, but use /CS to latch the addresses internally. You cannot use them as color RAM in a C64 unless you OR the /CS signal with /RAS. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2017-12-28 12:01:29
Archive generated by hypermail 2.2.0.