Sinclair ZX80 / ZX81 / Z88 Forums

This is my MMC interface that I designed and built. It's a nasty hacked-up board but it is only v1.0.. I'm sure I'd do a much better job of it now! Details here including schematic and code: http://www.robsonfamily.dsl.pipex.com/mmc/mmc.htm I was being a bit cheeky before - this requires a loader to...

Next up I'm going to be looking at improving the breakpoint functionality. At the very least I hope to add break on mem read/write. Possibly even counters and conditions.

But that all depends on how much fun there is to be had in the core

That's all very nice - but you need to load the loader first

You could put it into ROM of course - but that's a hardware upgrade too!

I recommend one of these:

You'll have to get the details from Mike but I think the OUTD fix is directly related to AY playing.

Available now! http://www.chuntey.com/eightyone.1.0a.zip What's new in EO 1.0a Version 1.0a 28/05/08 Added Memory Browser (SirMorris) Added Symbols to Debugger (SirMorris) Fixed bug in OUTD/OUTIR instructions (MW) Fixed bug with NMI occasionally triggering twice (MW) Here's a quick rundown of the ne...

You would probably need to have a high bitrate too. I have failed to load Apple programs which have been MP3'd - though if I was completely honest I should say that I didn't try very hard

In terms of memory updating I think that most programs typically concentrate changes in a small area. I keep a set of addresses that have been updated and when I update the window draw those that have changed in red. The changed set is cleared when you click step or run. You can see all the alterati...

BTW how did you get those ZX chars in your memory viewer ? i'm still struggling trying to get real time viewer updates working at an acceptable speed. I cheated. I'm blitting chars from a bitmap I made using some PRINTs and a screenshot :roll: I'm considering code to dynamically read the font from ...

Mike?

Chop down an old 8-bit ISA motherboard, or buy a spectrum joystick interface off ebay... Mike I thought about the isa board, but the solder tags aren't long enough to fit a through-connector without faffing :( As for the JS interfaces - I've considered that. It usually ends up as more expensive whe...