6502 assembly coding

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Changed of hosting strategy

Last post by Dbug « Thu Jan 16, 2025 8:17 am
Posted in General Discussion
Replies: 16
by Dbug » Sun Jun 28, 2020 4:34 pm » in General Discussion
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16 Replies

833949 Views

Last post by Dbug
Thu Jan 16, 2025 8:17 am

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Sedoric and reading at adr 0x208

Last post by Hialmar « Sun Feb 15, 2026 5:21 pm
Replies: 9
by Hialmar » Sun Feb 15, 2026 2:00 pm

9 Replies

36 Views

Last post by Hialmar
Sun Feb 15, 2026 5:21 pm
Scrolling world map for an RPG

Last post by Chema « Fri Feb 06, 2026 4:21 pm
Replies: 13
by Hialmar » Mon Jan 19, 2026 3:00 pm

13 Replies

285 Views

Last post by Chema
Fri Feb 06, 2026 4:21 pm
specific address code

Last post by Dbug « Tue Dec 09, 2025 8:37 pm
Replies: 21
by goyo » Mon Oct 13, 2025 7:42 pm
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21 Replies

1498 Views

Last post by Dbug
Tue Dec 09, 2025 8:37 pm
Generating a screen of random colors as quickly as possible ..

Last post by ibisum « Sun Sep 29, 2024 6:11 pm
Replies: 4
by ibisum » Sun Sep 29, 2024 3:30 pm

4 Replies

36807 Views

Last post by ibisum
Sun Sep 29, 2024 6:11 pm
C array reference from asm code with XA ?

Last post by goyo « Tue Jul 23, 2024 3:30 am
Replies: 7
by goyo » Sat Jul 13, 2024 9:58 pm

7 Replies

20314 Views

Last post by goyo
Tue Jul 23, 2024 3:30 am
Cannot change OSDKADDR value

Last post by simozzer « Sun Mar 31, 2024 1:10 am
Replies: 2
by simozzer » Sat Mar 30, 2024 2:26 am

2 Replies

11939 Views

Last post by simozzer
Sun Mar 31, 2024 1:10 am
Trouble with saving data using 6502

Last post by simozzer « Tue Dec 19, 2023 10:43 pm
Replies: 12
by simozzer » Thu Dec 07, 2023 10:21 pm

12 Replies

22972 Views

Last post by simozzer
Tue Dec 19, 2023 10:43 pm
looking for a pixel flood fill routine

Last post by Dbug « Sun Nov 05, 2023 9:55 am
Replies: 51
by goyo » Wed Sep 01, 2021 1:11 pm
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51 Replies

69114 Views

Last post by Dbug
Sun Nov 05, 2023 9:55 am
Fastest HIRES filling without page 0

Last post by Symoon « Fri Aug 04, 2023 7:42 am
Replies: 4
by Symoon » Thu Aug 03, 2023 9:22 pm

4 Replies

12953 Views

Last post by Symoon
Fri Aug 04, 2023 7:42 am
Syntax in MONASM

Last post by Chema « Tue Jun 13, 2023 7:50 am
Replies: 5
by Gliou » Fri Feb 17, 2023 10:11 pm

5 Replies

15653 Views

Last post by Chema
Tue Jun 13, 2023 7:50 am
How to code CLOAD"file" in assembler

Last post by Dbug « Tue Jan 24, 2023 10:06 am
Replies: 1
by coco.oric » Tue Jan 24, 2023 2:06 am

1 Replies

9612 Views

Last post by Dbug
Tue Jan 24, 2023 10:06 am
Teleass compilation...

Last post by damien « Wed Nov 02, 2022 9:39 pm
Replies: 2
by damien » Wed Nov 02, 2022 10:29 am

2 Replies

11465 Views

Last post by damien
Wed Nov 02, 2022 9:39 pm
XA for beginner: multipart TAP files?

Last post by Dbug « Sun Sep 25, 2022 1:21 pm
Replies: 3
by Symoon » Sun Sep 25, 2022 9:12 am

3 Replies

11256 Views

Last post by Dbug
Sun Sep 25, 2022 1:21 pm
XA: playing with tables

Last post by Symoon « Sun Aug 21, 2022 9:51 pm
Replies: 5
by Symoon » Sun Aug 21, 2022 1:50 pm

5 Replies

12625 Views

Last post by Symoon
Sun Aug 21, 2022 9:51 pm
Towards an onboard Oric Assembler/Editor Development environment

Last post by ibisum « Sat Aug 06, 2022 10:22 am
Replies: 12
by ibisum » Sun Jul 31, 2022 2:31 pm

12 Replies

17221 Views

Last post by ibisum
Sat Aug 06, 2022 10:22 am
XA or CA65 ?

Last post by Dbug « Sat Jul 30, 2022 1:27 pm
Replies: 20
by Symoon » Mon Jul 18, 2022 10:56 am
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20 Replies

26628 Views

Last post by Dbug
Sat Jul 30, 2022 1:27 pm
XA vs. CA65 programming tips, tricks and more

Last post by iss « Mon Jul 18, 2022 8:51 pm
Replies: 1
by iss » Mon Jul 18, 2022 8:17 pm

1 Replies

9370 Views

Last post by iss
Mon Jul 18, 2022 8:51 pm
A little more speed from the 6502 ...

Last post by Dbug « Sun Jun 26, 2022 11:49 am
Replies: 1
by ibisum » Sun Jun 26, 2022 10:54 am

1 Replies

8997 Views

Last post by Dbug
Sun Jun 26, 2022 11:49 am
Modifying interrupt address

Last post by Symoon « Fri Feb 18, 2022 9:37 pm
Replies: 13
by Symoon » Tue Feb 15, 2022 9:49 am

13 Replies

17833 Views

Last post by Symoon
Fri Feb 18, 2022 9:37 pm
Problem porting C code to ASM

Last post by jbperin « Thu Oct 07, 2021 3:04 pm
Replies: 8
by jbperin » Wed Oct 06, 2021 2:18 pm

8 Replies

17339 Views

Last post by jbperin
Thu Oct 07, 2021 3:04 pm
ROM disassembly

Last post by Dbug « Sun Mar 21, 2021 11:02 am
Replies: 12
by Xeron » Sat Mar 07, 2009 5:22 pm

12 Replies

47056 Views

Last post by Dbug
Sun Mar 21, 2021 11:02 am
Assembler / disassembler

Last post by Symoon « Fri Feb 12, 2021 8:08 am
Replies: 11
by Symoon » Sun Aug 20, 2017 11:00 am

11 Replies

30543 Views

Last post by Symoon
Fri Feb 12, 2021 8:08 am
Oric Atmos ROM 1.1b Disassembly - browsable listing by [raxiss]

Last post by Steve M « Mon Jan 04, 2021 1:22 am
Replies: 3
by iss » Fri Dec 25, 2020 12:23 pm

3 Replies

14732 Views

Last post by Steve M
Mon Jan 04, 2021 1:22 am
lda simplification of relative y index value ?

Last post by jbperin « Mon Dec 14, 2020 9:03 pm
Replies: 7
by goyo » Fri Dec 11, 2020 6:47 pm

7 Replies

18833 Views

Last post by jbperin
Mon Dec 14, 2020 9:03 pm
lda with 16 bits indirect address ?

Last post by goyo « Wed Dec 09, 2020 7:13 pm
Replies: 2
by goyo » Wed Dec 09, 2020 3:59 pm

2 Replies

11650 Views

Last post by goyo
Wed Dec 09, 2020 7:13 pm
Good documented source code examples on viewing selected part of bigger game map

Last post by xahmol « Sat Nov 21, 2020 1:03 pm
Replies: 12
by xahmol » Thu Nov 12, 2020 3:13 pm

12 Replies

20164 Views

Last post by xahmol
Sat Nov 21, 2020 1:03 pm
substraction of two 8bits signed values into a signed 16 bits

Last post by Chema « Fri Oct 02, 2020 12:55 pm
Replies: 7
by jbperin » Wed Sep 30, 2020 6:10 pm

7 Replies

18007 Views

Last post by Chema
Fri Oct 02, 2020 12:55 pm
set color and paper

Last post by goyo « Sat Aug 29, 2020 1:13 pm
Replies: 9
by goyo » Mon Aug 24, 2020 5:36 pm

9 Replies

19909 Views

Last post by goyo
Sat Aug 29, 2020 1:13 pm
Complete list of Oric Atmos adreeses

Last post by Steve M « Wed Jul 15, 2020 4:31 pm
Replies: 26
by coco.oric » Fri Jun 12, 2020 6:00 am
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2
26 Replies

39290 Views

Last post by Steve M
Wed Jul 15, 2020 4:31 pm
Assembly functions for Sedoric OPEN, TAKE, PUT, CLOSE

Last post by Chema « Thu May 21, 2020 1:36 pm
Replies: 25
by 8bit-Dude » Mon May 18, 2020 5:21 am
1

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25 Replies

37712 Views

Last post by Chema
Thu May 21, 2020 1:36 pm
Reading keyboard status, with keypress sound and cursor flashing disabled

Last post by Chema « Wed Apr 22, 2020 1:37 pm
Replies: 9
by marmakoide » Tue Apr 21, 2020 8:54 pm

9 Replies

18389 Views

Last post by Chema
Wed Apr 22, 2020 1:37 pm
XA Output

Last post by Badger « Thu Oct 24, 2019 6:21 am
Replies: 2
by Badger » Tue Oct 22, 2019 7:54 pm

2 Replies

16031 Views

Last post by Badger
Thu Oct 24, 2019 6:21 am
How to create random number with machine code?

Last post by Chema « Thu Mar 07, 2019 8:54 pm
Replies: 12
by peacer » Sun Dec 23, 2018 12:45 am

12 Replies

30604 Views

Last post by Chema
Thu Mar 07, 2019 8:54 pm
Help with a "Your computer" program

Last post by peacer « Wed Mar 06, 2019 8:30 pm
Replies: 11
by peacer » Fri Feb 08, 2019 1:00 am

11 Replies

28671 Views

Last post by peacer
Wed Mar 06, 2019 8:30 pm
Substraction and Addition

Last post by mikeb « Sun Jan 27, 2019 8:39 pm
Replies: 4
by peacer » Tue Dec 25, 2018 11:56 pm

4 Replies

16584 Views

Last post by mikeb
Sun Jan 27, 2019 8:39 pm
ROM 1.0 / 1.1 compatible programming trick?

Last post by NekoNoNiaow « Tue Nov 27, 2018 6:41 am
Replies: 6
by Symoon » Tue Nov 06, 2018 10:53 pm

6 Replies

21214 Views

Last post by NekoNoNiaow
Tue Nov 27, 2018 6:41 am
My first ASM and it doesnt do what I expect

Last post by Chema « Thu Nov 01, 2018 9:10 pm
Replies: 5
by Badger » Wed Oct 31, 2018 11:02 pm

5 Replies

17754 Views

Last post by Chema
Thu Nov 01, 2018 9:10 pm
Horizontal HIRES and Text scrolling code needed.

Last post by Dbug « Wed May 23, 2018 8:22 pm
Replies: 33
by peacer » Mon Jun 24, 2013 9:05 am
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33 Replies

87135 Views

Last post by Dbug
Wed May 23, 2018 8:22 pm
6502 flags C, N, Z, V and tests

Last post by ThomH « Tue May 22, 2018 3:10 pm
Replies: 7
by Symoon » Sat May 19, 2018 10:06 am

7 Replies

24040 Views

Last post by ThomH
Tue May 22, 2018 3:10 pm
Pseudo 3D Starfield

Last post by Chema « Mon May 21, 2018 5:52 pm
Replies: 3
by Twilighte » Tue Mar 11, 2008 5:36 pm

3 Replies

24439 Views

Last post by Chema
Mon May 21, 2018 5:52 pm
Identifying Oric-1

Last post by Godzil « Sun Feb 25, 2018 5:59 pm
Replies: 4
by polluks » Fri Dec 15, 2017 3:25 pm

4 Replies

23128 Views

Last post by Godzil
Sun Feb 25, 2018 5:59 pm
Help: loop this?

Last post by Symoon « Tue Aug 29, 2017 9:38 pm
Replies: 6
by Symoon » Sat Aug 26, 2017 7:45 am

6 Replies

26382 Views

Last post by Symoon
Tue Aug 29, 2017 9:38 pm
Convert a byte as hex string (to display on screen)

Last post by Dbug « Mon Aug 07, 2017 4:50 pm
Replies: 9
by Symoon » Fri Aug 04, 2017 7:41 pm

9 Replies

31000 Views

Last post by Dbug
Mon Aug 07, 2017 4:50 pm
Mysterious program

Last post by Symoon « Mon Jun 26, 2017 5:35 am
Replies: 14
by Symoon » Sat Feb 25, 2012 7:26 pm

14 Replies

40800 Views

Last post by Symoon
Mon Jun 26, 2017 5:35 am
Invert Carry

Last post by Symoon « Tue Aug 02, 2016 7:33 pm
Replies: 14
by Symoon » Fri Jul 29, 2016 7:29 pm

14 Replies

44131 Views

Last post by Symoon
Tue Aug 02, 2016 7:33 pm
List of 1.0 and 1.1 ROM routines ?

Last post by waskol « Mon Mar 28, 2016 4:33 am
Replies: 23
by Symoon » Mon Apr 06, 2015 11:52 am
1

2
23 Replies

72988 Views

Last post by waskol
Mon Mar 28, 2016 4:33 am
Brainf*ck for Oric

Last post by coco.oric « Sun Dec 27, 2015 3:28 am
Replies: 2
by iss » Sat Dec 26, 2015 2:01 pm

2 Replies

24885 Views

Last post by coco.oric
Sun Dec 27, 2015 3:28 am
BigMac(Merlin) and Monitor - Sedoric version

Last post by ibisum « Sun Jun 28, 2015 7:54 pm
Replies: 1
by iss » Sun Jun 28, 2015 1:55 pm

1 Replies

27885 Views

Last post by ibisum
Sun Jun 28, 2015 7:54 pm
Clearing the screen

Last post by Dbug « Sun Jun 28, 2015 12:16 pm
Replies: 6
by ChrisfromUSA » Sat Jun 27, 2015 10:02 pm

6 Replies

34113 Views

Last post by Dbug
Sun Jun 28, 2015 12:16 pm
colors

Last post by coco.oric « Sun Jun 28, 2015 6:50 am
Replies: 1
by ChrisfromUSA » Sun Jun 28, 2015 1:48 am

1 Replies

25953 Views

Last post by coco.oric
Sun Jun 28, 2015 6:50 am

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