Search found 147 matches

by tmr4
Thu May 04, 2023 7:43 am
Forum: Emulation and Simulation
Topic: Some Py65 Emulator Enhancements
Replies: 6
Views: 8018

Re: Some Py65 Emulator Enhancements

I've ported the py65 engine core to Typescript which greatly improved performance. I've also developed a Debug Adapter which allows debugging within Visual Studio Code. More detail at my Github db65xx .

For testing, I've just directly run the Klaus Dormann 6502 functional tests. This misses the ...
by tmr4
Tue Mar 14, 2023 4:20 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

I guess there are two types of kit. One is the "electronics for absolute beginners" type where you get a breadboard and a bag full of components and you build your projects without soldering.
The other type is where you end up with something more permanent, which will require soldering.
To me ...
by tmr4
Mon Mar 13, 2023 6:02 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

drogon wrote:
Might as well just emulate it all on a PC...
Soon everything will be replaced by ChatGPT...
by tmr4
Sun Mar 12, 2023 11:53 pm
Forum: Programming
Topic: [ca65] Placing words at specific locations in segment
Replies: 1
Views: 1203

Re: [ca65] Placing words at specific locations in segment

and3rson wrote:
I assume the calls need to be sorted by "char" in ascending order, right?
Yes, that's important.
and3rson wrote:
With a minor tweak it worked - thanks!
Ha, ha. Off by one has always been my bane!
by tmr4
Sun Mar 12, 2023 9:40 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

Surely anyone who buys an electronic project kit would expect soldering to be required? Tongue in check I guess. Here's the first kit I bought for my girls. IMG_20230312_143202329.jpg It wasn't until many years later that I bought a soldering kit for them, mostly because my youngest said she should ...
by tmr4
Sun Mar 12, 2023 9:26 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

But what I really lusted after was one of those 100-in-1 project kits as shown here: https://www.radioshackcatalogs.com/flipbook/1976_radioshack_catalog.html?fb3d-page=92 I saved up my paper route money and bought one of those. I remember walking miles to the Radio Shack to get it because I didn't ...
by tmr4
Sun Mar 12, 2023 8:14 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

But what I really lusted after was one of those 100-in-1 project kits as shown here: https://www.radioshackcatalogs.com/flipbook/1976_radioshack_catalog.html?fb3d-page=92 I saved up my paper route money and bought one of those. I remember walking miles to the Radio Shack to get it because I didn't ...
by tmr4
Sun Mar 12, 2023 5:14 pm
Forum: Programming
Topic: [ca65] Placing words at specific locations in segment
Replies: 1
Views: 1203

Re: [ca65] Placing words at specific locations in segment

Try using a macro that takes the ascii character and jump address as parameters. Have the macro keep track of the current position (using the set command) and use the repeat control command to fill in the empty entries up to that point. So something like this: .macro jmptbl char addr
.repeat char ...
by tmr4
Sun Mar 12, 2023 2:42 pm
Forum: Newbies
Topic: Ben Eater's Reset Circuit
Replies: 54
Views: 37972

Re: Ben Eater's Reset Circuit

I saw that too. You can hear him pause just slightly at that point as if he's wondering whether to explain it or not.

If you look closely at the build in the video, you'll see that the reset circuit doesn't have a capacitor, even though it's there in the photo and schematic on his website. It's ...
by tmr4
Thu Mar 09, 2023 5:55 pm
Forum: General Discussions
Topic: Current 6502 Kits
Replies: 134
Views: 27014

Re: Current 6502 Kits

In the case of a certain, well-known Youtube hawker of 6502 kits, support is minimal. That’s why we have people signing up here and posting, “I built Ben Eater’s 6502 kit and it isn’t working. Help!” :D It's a business decision which doesn't seem to have affected his sales. Ben set up a reddit ...
by tmr4
Sat Feb 18, 2023 6:41 am
Forum: Programming
Topic: Newbie to the 65816. WDCtools C compiler and debugger issue.
Replies: 30
Views: 5748

Re: Newbie to the 65816. WDCtools C compiler and debugger is

jmthompson wrote:
Hey, that seems to have done it! It throws warnings about BSS segments having run attributes, but it does link and the resulting code seems to work.
I don't have that problem. Perhaps your configuration needs some refinement.
by tmr4
Fri Feb 17, 2023 7:17 am
Forum: Programming
Topic: Newbie to the 65816. WDCtools C compiler and debugger issue.
Replies: 30
Views: 5748

Re: Newbie to the 65816. WDCtools C compiler and debugger is

jmthompson wrote:
Specifically the direct page. And not so much tracking DB as (1) not understanding DP not being at $0000 and (2) inability to have more than one such segment.
Try specifying the run attribute with a start address of $0 for the DP segments that aren't located on the zero page.
by tmr4
Thu Feb 16, 2023 10:32 pm
Forum: Programming
Topic: Newbie to the 65816. WDCtools C compiler and debugger issue.
Replies: 30
Views: 5748

Re: Newbie to the 65816. WDCtools C compiler and debugger is

My impression, as I view them from a distance, is that As65 is far better than ca65. A closer look might be worthwhile for those wanting more features, control and flexibility in their assembler. The downside? It will take longer to get up and running with ca65. I especially like that ca65 gives a ...
by tmr4
Wed Feb 15, 2023 7:29 pm
Forum: Programming
Topic: Newbie to the 65816. WDCtools C compiler and debugger issue.
Replies: 30
Views: 5748

Re: Newbie to the 65816. WDCtools C compiler and debugger is

While I use cc65 on the 65C02, I've not tried any C on the '816. I've spent some time recently using cc65 for the '816. The C library doesn't have a '816 target (and if fact only somewhat utilizes 65c02 features) but you can run programs on the '816 in emulation mode. It's not hard to create a ...
by tmr4
Sat Feb 11, 2023 3:46 pm
Forum: Hardware
Topic: Looking for potential schematic corrections
Replies: 33
Views: 11419

Re: Looking for potential schematic corrections

If you're going to redo your schematics, consider using bus wiring for the address and data busses. It will make the schematics more readable. Here is WDC's 816sxb board schematic as an example.