Hello,
I have a small problem with the use of the VLINK. I hope someone can help me:
In the VIC-20 program source code, I am using the *=<expression> to define the base address for the code section (starts at $1001) and the character section (starts at $1C00):
*=$1001
; Code and data
...
*=$1C00 ...
Search found 8 matches
- Tue Dec 28, 2021 4:24 am
- Forum: Programming
- Topic: VLINK problem with *=<expression> on VIC-20
- Replies: 1
- Views: 913
- Wed Dec 15, 2021 4:38 am
- Forum: Programming
- Topic: I am drawing a line on VIC-20, but it blinks...
- Replies: 8
- Views: 2307
Re: I am drawing a line on VIC-20, but it blinks...
Hi BigEd,
Might an interrupt come in and take a lot of time, such that waiting for line 51 (or 31 according to your comment) is going to wait almost a whole frame, because the line is past?
Right, 71 cycles is a lot for your code, but what might an interrupt handler take? If you disable ...
Might an interrupt come in and take a lot of time, such that waiting for line 51 (or 31 according to your comment) is going to wait almost a whole frame, because the line is past?
Right, 71 cycles is a lot for your code, but what might an interrupt handler take? If you disable ...
- Tue Dec 14, 2021 5:03 pm
- Forum: Programming
- Topic: I am drawing a line on VIC-20, but it blinks...
- Replies: 8
- Views: 2307
Re: I am drawing a line on VIC-20, but it blinks...
Hello BigEd,
Thanks for the answer. See my comments:
but I'll chip in with the observation that by waiting for the very next line, you might be in a race against time.
I have tried it, but it did not help... I am using the VIC-20 PAL emulator version with 1.108.405 Hz 6502 CPU. Given the PAL is ...
Thanks for the answer. See my comments:
but I'll chip in with the observation that by waiting for the very next line, you might be in a race against time.
I have tried it, but it did not help... I am using the VIC-20 PAL emulator version with 1.108.405 Hz 6502 CPU. Given the PAL is ...
- Tue Dec 14, 2021 4:25 pm
- Forum: Programming
- Topic: I am drawing a line on VIC-20, but it blinks...
- Replies: 8
- Views: 2307
I am drawing a line on VIC-20, but it blinks...
Hello,
I am so frustrated and exhausted :shock: Hope some good developer can help me…
I have made a simple VIC-20 program (attached), which waits for the raster beam, changes the color once the line is detected and on the next line it changes it back, so it draws a line. And it should stay like ...
I am so frustrated and exhausted :shock: Hope some good developer can help me…
I have made a simple VIC-20 program (attached), which waits for the raster beam, changes the color once the line is detected and on the next line it changes it back, so it draws a line. And it should stay like ...
- Tue Nov 30, 2021 5:05 pm
- Forum: Programming
- Topic: How to get the VICE compatible symbol file from VASM?
- Replies: 3
- Views: 824
Re: How to get the VICE compatible symbol file from VASM?
Hi vbs
To be more flexible, we implemented this feature in our linker vlink rather than the assembler. If you are already using vlink, you can simply add the option: -vicelabels <filename>
The vlink works great. I still need small advice - is there any way how to create the breakpoints (?based on ...
To be more flexible, we implemented this feature in our linker vlink rather than the assembler. If you are already using vlink, you can simply add the option: -vicelabels <filename>
The vlink works great. I still need small advice - is there any way how to create the breakpoints (?based on ...
- Tue Nov 30, 2021 4:16 am
- Forum: Programming
- Topic: How to get the VICE compatible symbol file from VASM?
- Replies: 3
- Views: 824
How to get the VICE compatible symbol file from VASM?
I am using the VASM assembler with the VICE emulator. I have tried to find the answer to my problem on other forums (https://www.lemon64.com/forum/viewtopic.php?t=78870&start=0) and to figure out that on my own without any succes so far...
I have found that other assemblers, e.g. 64tass has a nice ...
I have found that other assemblers, e.g. 64tass has a nice ...
- Sun Nov 28, 2021 8:14 am
- Forum: General Discussions
- Topic: Fake 6502s?
- Replies: 11
- Views: 1587
Fake 6502s?
Recently I went over some auctions with very cheap 6502 CPUs.
When I asked to get the actual photo I have received the attached images. Considering that the 4 digits are WEEK:YEAR I think those are some other CPUs, which were sandblasted the original marking, blacktopped and new marking was ...
When I asked to get the actual photo I have received the attached images. Considering that the 4 digits are WEEK:YEAR I think those are some other CPUs, which were sandblasted the original marking, blacktopped and new marking was ...
- Sun Nov 28, 2021 7:46 am
- Forum: Newbies
- Topic: Project to test 6502 on real computer
- Replies: 6
- Views: 1233
Project to test 6502 on real computer
I got into a strange situation because I'm a both - little hot-tempered and a little stupid, so please don't judge me:
- I own a 30 MOS 6502 CPUs.
- When arguing with friend of mine over whether they work, I bet I can prove that all CPUs are fine.
- Unfortunately, a NOP tester is not enough ...
- I own a 30 MOS 6502 CPUs.
- When arguing with friend of mine over whether they work, I bet I can prove that all CPUs are fine.
- Unfortunately, a NOP tester is not enough ...