24 Jun 2024 - smokku
Hardware interface is implemented and validated. 🎉
19 Jun 2024 - smokku
The second set of protoboards has arrived! 🎉
11 Jun 2024 - smokku
We have working sprites! 👻 boo…
10 Jun 2024 - smokku
The default text mode font is now aligned with CP437 and includes PETSCII and ATASCII semigraphics.
08 Jun 2024 - smokku
The color palette now features a full 256 colors.
06 Jun 2024 - smokku
The last mode to implement was the text mode.
05 Jun 2024 - smokku
Woohoo!!! 🎉 I’ve just finished multi-color modes implementation.
02 Jun 2024 - smokku
So far I’ve been working on a hardcoded display mode handling, during development of VPU firmware. Today I implemented ANTIC-like Display List.
29 May 2024 - smokku
Today I finalized HiRes graphics mode implementation.
09 May 2024 - smokku
The protoboards arrived! 🎉
27 Apr 2024 - smokku
Choosing a color palette for VPU is very important. It defines the characteristic of visuals generated by the machine.
16 Apr 2024 - smokku
The breadboard build reached its frequency limits, so I needed to design a proper PCB to be able to run RIA firmware full speed.
27 Mar 2024 - smokku
X65.zone BBS is now accessible over the web:
24 Mar 2024 - smokku
You know… This is crazy… But I am running a BBS
😸
21 Mar 2024 - smokku
Site was rewritten in Jekyll.
21 Mar 2024 - smokku
Done rewriting text mode console to DVI output.
20 Mar 2024 - smokku
Working towards textmode terminal on DVI display…
18 Mar 2024 - smokku
DVI (HDMI) output is working 😁
14 Mar 2024 - smokku
VGA output is working 😁
12 Mar 2024 - smokku
This is basically what I’ve built on the breadboards.
10 Mar 2024 - smokku
I’ve assembled a short program looping on STA instruction,
put it in 0000
address using monitor,
set RESET Vector to 0000
and started 65816 CPU…
07 Mar 2024 - smokku
This is going to be one weird clock… 😹
07 Mar 2024 - smokku
Memory reading by CPU works! 🎉
06 Mar 2024 - smokku
The current limiting factor on how fast the CPU can run is the memory speed.
02 Mar 2024 - smokku
Memory writing works. 🎉
01 Mar 2024 - smokku
Memory reading works. 🎉
29 Feb 2024 - smokku
I needed to verify whether CPU bus interface is working properly, so I wrote a some code, to dump consecutive CPU address reads to serial console.
27 Feb 2024 - smokku
Memory communication is working again. This time over QPI.
25 Feb 2024 - smokku
1/2 of memory emulation PIO programs done! Pico is able to read A0-A23 address from CPU and feed it with NOPs.
18 Feb 2024 - smokku
CPU bus and Memory CE signals are now driven using 2->4 decoders.
27 Jan 2024 - smokku
Providing 65816 CPU with full 16MB of parallel DRAM, it was designed for, is simply not an option.
20 Jan 2024 - smokku
WDC 65C816 CPU has a complex data bus cycle.
19 Jan 2024 - smokku
Got RP6502 Picocomputer RIA firmware running on my breadboard build.
14 Jan 2024 - smokku