*** M E M O R U M ***

According to the table on Dave's site, you have FPGA firmware version 1.01. With that version of the firmware, the 80 column display uses the FPGA internal RAM, and it is only the 40-column (VDP emulation) display that uses the external RAM. So that very much suggests to me that the problem lies wit...

So far there has not been enough interest shown to be worth hosting the event this year. It really needs at least four or five people. There's probably 4 or 5 of the usual suspects that would attend via skype like last time. I meant four or five physically present. Since there is really no new hard...

I am less than 50 miles NE of London. I will send a more precise location by PM.

So far there has not been enough interest shown to be worth hosting the event this year. It really needs at least four or five people.

Unfortunate that there are two major events on the same weekend, splitting possible attendance.

So if there is going to be a Memofest this year, it probably needs to be on a different date.

Martin A wrote: ↑27 Sep 2024 17:52 Do we need to post a link to this thread on FB ?

It might be worthwhile. It does not seem to be getting much attention here.

Having looked at the code, support for an I2C port expander was in reasonable shape, and it was not too much work to hack it into he Linux builds. Pull the latest code from my repository, then either: cd MEMU mkdir build cd build cmake -DTARGET=XWin -DHW_23017=Y .. make Or: cd MEMU mkdir build cd bu...

For use with a Pi Zero I would suggest something like this. It provides 16 Input / Outputs at 5v, as per the MTX I/O port.

I have got something I am trying to finish first, then I will have a look at adding support for this to MEMU.

I hope this is an incentive to work on a modern GPIO implementation I'm more than happy to test it ;-). Any preference: Raspberry Pi or Pico? The Pico has the advantage of much faster boot (no Linux operating system). If just reading buttons then they probably have a simple pull-up to 5v. Change th...

Unfortunately it supports some (custom ) hardware. ... Indeed interfacing the hardware will be the next challenge because the pi IO is not even 5 Volt tolerant. How was the hardware attached? Centronics Printer Port The internal 20-pin Custom I/O DIP socket The 60-way edge connector Depending upon ...

Is the simulator pure software, or does it interface to any special hardware? If pure software, then you want MEMU . That will run on any Raspberry Pi with HDMI display, or even on a Pico with VGA display. If the simulator needs to control any hardware, then that can be done using GPIO. It may be ne...