Addressing into screen memory, how?

Basic and Machine Language

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MartinC
Vic 20 Drifter
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Website: https://winterfam.co.uk
Location: Kent,uk
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Re: Addressing into screen memory, how?

Post by MartinC »

Hi Thegg,

Progress at last!

Screenshot 2022-11-22 165701.png

Not all of the characters I needed were in the first 64, so after a bit of rearranging^^^

Need to tidy up the design of the characters, but I feel like I am moving forward now. I don't know if it's a CBM Prg Studio bug - but the colour data is all zeros when the code assembles - should be just green and black. Might have to flag that to Arthur.

I need to understand the Vic memory map better - I am trying to work in unexpanded for now and need to go back to some of the books and remind myself of how everything is laid out again, so I don't corrupt my screen data.

Thanks so much for your help and patience.
Last edited by Mike on Mon Jan 09, 2023 5:28 pm, edited 1 time in total.
Reason: attachment/screenshot repaired
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thegg
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Re: Addressing into screen memory, how?

Post by thegg »

MartinC wrote: Tue Nov 22, 2022 11:05 am Hi Thegg,

Progress at last!
Great. I'm glad you have got there. Understanding the memory map and planning accordingly is a good way to go.

I look forward to seeing your first finished project.
malcontent
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Re: Addressing into screen memory, how?

Post by malcontent »

Is this an AGC emulator? :shock:
MartinC
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Posts: 33
Joined: Tue Oct 25, 2022 12:18 pm
Website: https://winterfam.co.uk
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Re: Addressing into screen memory, how?

Post by MartinC »

Hello, I'm starting with the DSKY...
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