The Sinclair QL Forum

Nice project! Glad to see you are still QL-active!

I'm assuming the kb row required is input via a rd of x18003 and the 8 bits are returned via x18021 - but I may have this wrong. The keyboard is connected to the 8049 and the ZX8302 only provides a serial link to it. Unless you change the ROM to use a different communication method, you would have ...

Only 32KB ROM, interesting, maybe it needs a dongle, or is a pre-release.

Great! In my latest ula clone, I didn't replaced the ram but added a 64K shadow ram that the ula uses to read the video ram faster and it has a 30% video speed improvement because it steels less cycles from the cpu when it accesses the video ram but still with the 68008 that has the 8bit bus and a ...

The ULA gets 18 of the 20 address lines, so without extra connections it's limited to the original 128 KB of RAM.

Was the video memory implemenetd with SDRAM oder SRAM? My Mister has 32 MB SDRAM that is used for everything, including storing the QL RAM. I made no changes to that part of the QL FPGA code. Had Sinclair really created a business+multimedia computer at the time, my guess is that they would have ha...

I've finally found some time to tweak some demo code I've had for a couple of years and make a video out of it that shows the extended QL graphics idea: https://www.youtube.com/watch?v=7EizW3ZWNqc[/youtube]

Graphics accelaration was the Commodore way, making those machines expensive. It contibuted to the ZX Spectrum's a huge success to avoid this, addressing the less monied audience. Considering the QL was a low cost machine, not even aimed at games, and Sinclair had to cut costs somehwere , I think t...

The QL architecture already suffers a bit from its "dumb" plain frame buffer, loading the CPU with moving about large chunks of memory (even larger and probably getting into the unbearable when we consider larger color depths). If you're looking for inspiration, it would probably make sen...

I totally understand you, to explore FPGAs and what hardware I could build myself I created a CPU (the Lion CPU) and a working computer with sprites, sampled audio and vector graphics from scratch. It's fun to do it your way, and you learn a lot. Wow, that's seriously impressive! :o Congrats! Love ...