Alphatronic P2 memory mapping
Sunday, September 25, 2022 •
One last experiment: Since I figured out, that my Alphatronic P2 has an additional 16 kB card (which might make it a P2U), I shall try to use this memory. This is achieved by bank switching.
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Bicycle Tour 2022
Monday, August 22, 2022 •
My yearly bicycle tour this year was from Munich to Praha via Köngissee.
Alphatronic P2 speed follow-up 2
Saturday, July 23, 2022 •
This is one additional follow up. As figured out in the last post, the used memory chips (ROM and RAM) on the CPU card are likely fast enough to be used without a wait state. So the idea is, to run my tone generator and maybe the floppy drive rotation measurement in the RAM on the CPU card.
Alphatronic P2 speed follow-up
Tuesday, June 28, 2022 •
As described in the last post Intel 8085A timings it has been established that it is very likely, that the Alphatronic P2 introduces a wait state for accessing RAM and ROM. The numbers seem to fit.
Intel 8085A timings
Sunday, May 15, 2022 •
This post is a follow up on the last post about Alphatronic’s P2 CPU speed. I created back then a sound that was supposed to be exactly one second long, but it actually was 1.28 seconds long. So, something I was doing wrong…
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