Kiwi - a 68k Homebrew Computer

Sounds and looks interesting. I imagine how a aluminum case would look like.

For the hardware... I added some design files to the internal member area. So if you want a Kiwi let us get on the work.

Simon

Hello, available SID files come with an own player routine written for 65xx CPUs. Hence all PC based SID players emulate this CPU or even more parts of the C64. This approach is probably not the way to go as it needs too much computing power. To circumvent the emulation layer I used siddump from cov...

Doing stuff with a SID (or any of the other programmable sound generator type chips of that era like the Atari POKEY or the General Instrument AY-3-8910) requires writing raw code whereas using an FM synthesis chip like the YM2151 or the OPL means you can probably just write something to play music...

Hello,

as the syntax of EhBASIC's source code is not compatible with gnu-as, I use a cumbersome way to build a complete Basic binary. See http://www.ist-schlau.de/software.html#Basic. Maybe someone is interested in porting the syntax to gnu-as?

Simon

Hello, the current design demands to supply 12V and 5V. A desktop power-supply which is strong enough to power all chips, floppy, harddrive, ... is expensive. What about supplying 12V only and use a voltage regulator for the 5V? But a 7V drop is not very good. :roll: What about a step down converter...

Hello, as I told there are some issues with the current design I want specify here. ⋅ My symbol for the WD177x had a double counted pin. This resulted in an short between D3 and SYS_RESET. The symbol and the schematics which can be downloaded are corrected. But my PCB layout data still hav...

I would prefer the MC68000 as well. This way the design changes will be minimalistic. For the audio I am really not sure. I really like the SID sound. Maybe we could do another audio source as option. Route these signal to the input of the SID? But if we need DMA for audio, the DMA needs a good timi...

@jonwil: A MC68000 sound interesting. We should look, what changes would be needed. For now all chips are connected to addressbus line A1 upwards, which simplifies the change from software side. Then the 16 bit buffer can be dropped. But there has to be a second Eprom for a full 16 bit databus. What...

Hello all and welcome, I hope the forum doesn't need approval of postings any longer. Sorry for this! For VGA there should be a scandoubler. The V9990 is capable to output a VGA signal, but it does this in two special office screen modes only. All the nice modes including the pattern modes are for s...

Hi,

today I worked a bit on my Pac Man like game. I added collision detection as well as player animation.
Strange that the eaten dots are not couted correct, except when moving to the right. Probably there is a bug in my collision detection. Hmmm.



Simon