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Last post

w65c02 default behavior is not expected

Last post by Yuri « Fri Jun 28, 2024 3:32 pm
Replies: 4
by 4Dimensional » Thu Jun 27, 2024 10:38 pm

4 Replies

2972 Views

Last post by Yuri
Fri Jun 28, 2024 3:32 pm
Flicking through my 6502 book

Last post by Lazarusbrigade « Sun Jun 02, 2024 3:06 pm
Replies: 6
by Lazarusbrigade » Fri May 31, 2024 8:46 pm

6 Replies

3165 Views

Last post by Lazarusbrigade
Sun Jun 02, 2024 3:06 pm
Hello all

Last post by Lazarusbrigade « Mon May 27, 2024 6:17 pm
Replies: 2
by Lazarusbrigade » Mon May 27, 2024 5:59 pm

2 Replies

2574 Views

Last post by Lazarusbrigade
Mon May 27, 2024 6:17 pm
Trying to decipher the mysteriously confusing WDC 65c02 SXB

Last post by viridi « Thu May 16, 2024 6:10 pm
Replies: 35
by Aloha6502 » Fri Jun 03, 2022 8:39 am
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35 Replies

31441 Views

Last post by viridi
Thu May 16, 2024 6:10 pm
It begins! (Wren Prototype build log)

Last post by allisonlastname « Tue May 07, 2024 4:01 pm
Replies: 117
by allisonlastname » Wed Aug 16, 2023 2:45 pm
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117 Replies

2947339 Views

Last post by allisonlastname
Tue May 07, 2024 4:01 pm
Build 6502 with TTL components

Last post by WCMiller « Tue May 07, 2024 12:23 am
Replies: 26
by bmab » Sun Mar 31, 2024 12:43 pm
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2
26 Replies

50113 Views

Last post by WCMiller
Tue May 07, 2024 12:23 am
Help understanding indirect Y

Last post by 6502inside « Thu May 02, 2024 8:17 pm
Replies: 6
by gluesniffing » Thu May 02, 2024 5:31 pm

6 Replies

3485 Views

Last post by 6502inside
Thu May 02, 2024 8:17 pm
6502 From the beginning

Last post by rob42 « Tue Apr 09, 2024 3:14 pm
Replies: 43
by rob42 » Mon Apr 01, 2024 11:15 pm
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43 Replies

42615 Views

Last post by rob42
Tue Apr 09, 2024 3:14 pm
Help with implementing an existing memory map

Last post by BruceRMcF « Sun Mar 31, 2024 8:08 pm
Replies: 6
by nadia2 » Thu Mar 28, 2024 4:05 am

6 Replies

8751 Views

Last post by BruceRMcF
Sun Mar 31, 2024 8:08 pm
Help with 2-byte indexing lookup table

Last post by tonyame « Thu Mar 28, 2024 11:16 pm
Replies: 12
by tonyame » Tue Mar 26, 2024 6:12 am

12 Replies

5265 Views

Last post by tonyame
Thu Mar 28, 2024 11:16 pm
[SOLVED] HW problem on breadboard - can somebody help?

Last post by gilhad « Fri Mar 15, 2024 6:54 pm
Replies: 13
by gilhad » Sat Mar 09, 2024 10:46 am

13 Replies

5841 Views

Last post by gilhad
Fri Mar 15, 2024 6:54 pm
shopping list

Last post by barnacle « Thu Feb 29, 2024 5:37 am
Replies: 59
by allisonlastname » Fri Mar 31, 2023 12:37 pm
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59 Replies

33768 Views

Last post by barnacle
Thu Feb 29, 2024 5:37 am
Hello All

Last post by paritybit « Sun Feb 25, 2024 1:54 am
Replies: 4
by copperjump » Wed Feb 21, 2024 8:03 pm

4 Replies

3908 Views

Last post by paritybit
Sun Feb 25, 2024 1:54 am
Basic questions on patching into a 6502 on apple motherboard

Last post by paritybit « Tue Feb 20, 2024 12:42 pm
Replies: 4
by paritybit » Tue Feb 20, 2024 2:29 am

4 Replies

3518 Views

Last post by paritybit
Tue Feb 20, 2024 12:42 pm
Greetings - I am new and jumping head first

Last post by BigDumbDinosaur « Fri Feb 09, 2024 7:26 am
Replies: 6
by DrLogistik » Wed Feb 07, 2024 8:40 pm

6 Replies

3800 Views

Last post by BigDumbDinosaur
Fri Feb 09, 2024 7:26 am
Hold BE low during bootloader reads

Last post by BigEd « Sat Feb 03, 2024 2:10 pm
Replies: 6
by sburrow » Fri Feb 02, 2024 1:54 pm

6 Replies

4236 Views

Last post by BigEd
Sat Feb 03, 2024 2:10 pm
Strange memory write problems

Last post by barnacle « Sat Jan 20, 2024 6:25 am
Replies: 179
by adrianhudson » Fri Oct 21, 2022 4:44 pm
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179 Replies

42930 Views

Last post by barnacle
Sat Jan 20, 2024 6:25 am
Hi, my first post here on 6502 org

Last post by 6502inside « Sun Jan 14, 2024 9:10 pm
Replies: 3
by MarcoPajotter » Sat Jan 13, 2024 6:59 pm

3 Replies

3897 Views

Last post by 6502inside
Sun Jan 14, 2024 9:10 pm
Question IRQ interruption during BRK execution .

Last post by BigEd « Thu Jan 11, 2024 9:22 pm
Replies: 18
by gregorio » Wed Jan 03, 2024 10:05 pm
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18 Replies

7365 Views

Last post by BigEd
Thu Jan 11, 2024 9:22 pm
Clock A Ricoh 2A03 with an Arduino UNO

Last post by BigEd « Thu Jan 11, 2024 7:43 am
Replies: 8
by rowansimpson » Tue Jan 09, 2024 10:40 pm

8 Replies

4463 Views

Last post by BigEd
Thu Jan 11, 2024 7:43 am
Coding for a DS18B20 single data line temperature sensor.

Last post by getting there « Tue Jan 02, 2024 6:27 pm
Replies: 4
by getting there » Mon Jan 01, 2024 7:04 pm

4 Replies

4239 Views

Last post by getting there
Tue Jan 02, 2024 6:27 pm
Which flag bits are set by the PLP instruction on 6502?

Last post by BigDumbDinosaur « Tue Dec 26, 2023 5:46 pm
Replies: 3
by randomkiwi » Tue Dec 26, 2023 1:02 pm

3 Replies

16866 Views

Last post by BigDumbDinosaur
Tue Dec 26, 2023 5:46 pm
Troubleshooting a W65C134SXB

Last post by drogon « Fri Dec 22, 2023 8:35 am
Replies: 7
by bexsella » Thu Dec 21, 2023 1:45 am

7 Replies

202546 Views

Last post by drogon
Fri Dec 22, 2023 8:35 am
LCD Text jumbled on 6502

Last post by Dr Jefyll « Tue Dec 12, 2023 3:23 pm
Replies: 23
by besser435 » Wed Dec 14, 2022 7:25 pm
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23 Replies

516499 Views

Last post by Dr Jefyll
Tue Dec 12, 2023 3:23 pm
Want to check my understanding on some timings.

Last post by BigEd « Mon Dec 11, 2023 8:28 am
Replies: 6
by Yuri » Mon Dec 11, 2023 3:41 am

6 Replies

42127 Views

Last post by BigEd
Mon Dec 11, 2023 8:28 am
VIA RS/CS changes?

Last post by BruceRMcF « Wed Nov 22, 2023 5:15 pm
Replies: 10
by sburrow » Sat Nov 18, 2023 3:25 pm

10 Replies

11269 Views

Last post by BruceRMcF
Wed Nov 22, 2023 5:15 pm
What does (PC+1) -> PCL and (PC+2) -> PCH mean here?

Last post by drogon « Wed Nov 22, 2023 3:12 pm
Replies: 1
by randomkiwi » Wed Nov 22, 2023 3:02 pm

1 Replies

4313 Views

Last post by drogon
Wed Nov 22, 2023 3:12 pm
Widescreen (480x800) VGA Timing?

Last post by barnacle « Sun Nov 19, 2023 6:02 am
Replies: 12
by WCMiller » Fri Nov 03, 2023 6:24 pm

12 Replies

7229 Views

Last post by barnacle
Sun Nov 19, 2023 6:02 am
Using x and y registers as an address

Last post by Dr Jefyll « Thu Nov 16, 2023 4:02 am
Replies: 25
by Oman395 » Wed Dec 15, 2021 7:08 pm
1

2
25 Replies

14205 Views

Last post by Dr Jefyll
Thu Nov 16, 2023 4:02 am
How does a 6502 processor know when to stop F-D-E-U cycle?

Last post by BigEd « Fri Nov 10, 2023 8:08 am
Replies: 2
by randomkiwi » Thu Nov 09, 2023 8:19 pm

2 Replies

4008 Views

Last post by BigEd
Fri Nov 10, 2023 8:08 am
Implimenting BCPL on 6502

Last post by Proxy « Mon Dec 18, 2023 9:11 pm
Replies: 11
by MartyG » Wed Nov 01, 2023 3:52 am

11 Replies

7789 Views

Last post by Proxy
Mon Dec 18, 2023 9:11 pm
Sheep no longer

Last post by Paganini « Sun Oct 29, 2023 6:51 pm
Replies: 4
by johnsheep » Sun Oct 29, 2023 12:49 pm

4 Replies

9166 Views

Last post by Paganini
Sun Oct 29, 2023 6:51 pm
6502 or 65c02 double processor

Last post by drogon « Sat Oct 28, 2023 2:20 pm
Replies: 1
by Vinci » Sat Oct 28, 2023 1:42 pm

1 Replies

4941 Views

Last post by drogon
Sat Oct 28, 2023 2:20 pm
What are the initial values of the flag bits?

Last post by Chromatix « Fri Oct 27, 2023 1:01 pm
Replies: 3
by randomkiwi » Thu Oct 26, 2023 5:50 pm

3 Replies

4243 Views

Last post by Chromatix
Fri Oct 27, 2023 1:01 pm
Address decoding (Garth's primer)

Last post by Michael « Sun Oct 22, 2023 9:53 pm
Replies: 7
by adrianhudson » Mon May 02, 2022 6:15 pm

7 Replies

18016 Views

Last post by Michael
Sun Oct 22, 2023 9:53 pm
Anything like the old Altair or heathkit in 6502 world?

Last post by Agumander « Sat Oct 21, 2023 3:51 pm
Replies: 13
by pdragon » Sun Oct 01, 2023 5:05 pm

13 Replies

16608 Views

Last post by Agumander
Sat Oct 21, 2023 3:51 pm
Struggling with the ACIA

Last post by GregCoonrod « Fri Oct 20, 2023 1:01 am
Replies: 8
by GregCoonrod » Tue Oct 17, 2023 6:11 pm

8 Replies

10990 Views

Last post by GregCoonrod
Fri Oct 20, 2023 1:01 am
Input Voltage Levels for 65xx

Last post by and3rson « Sun Oct 15, 2023 1:16 pm
Replies: 5
by sburrow » Fri Oct 13, 2023 11:36 pm

5 Replies

6926 Views

Last post by and3rson
Sun Oct 15, 2023 1:16 pm
vasm problem

Last post by anomie « Sun Oct 01, 2023 2:00 pm
Replies: 13
by BobKay » Fri Sep 15, 2023 3:12 pm

13 Replies

22283 Views

Last post by anomie
Sun Oct 01, 2023 2:00 pm
Possibly Dumb Question(s)

Last post by anomie « Sat Sep 30, 2023 1:22 am
Replies: 26
by anomie » Sun Sep 03, 2023 5:47 pm
1

2
26 Replies

17697 Views

Last post by anomie
Sat Sep 30, 2023 1:22 am
Help on choosing an MMU for 65c816

Last post by anomie « Tue Sep 19, 2023 9:23 pm
Replies: 15
by franz357 » Mon Sep 18, 2023 2:41 pm
1

2
15 Replies

14456 Views

Last post by anomie
Tue Sep 19, 2023 9:23 pm
VIA control line question

Last post by Dr Jefyll « Mon Sep 11, 2023 3:53 pm
Replies: 4
by allisonlastname » Mon Sep 11, 2023 2:40 pm

4 Replies

5529 Views

Last post by Dr Jefyll
Mon Sep 11, 2023 3:53 pm
Newbie question on RAMDAC ADV476

Last post by BigEd « Mon Aug 28, 2023 6:09 pm
Replies: 4
by Stefan » Mon Aug 28, 2023 12:21 pm

4 Replies

4712 Views

Last post by BigEd
Mon Aug 28, 2023 6:09 pm
RAM question

Last post by J64C « Wed Aug 16, 2023 11:08 am
Replies: 6
by J64C » Wed Aug 16, 2023 3:30 am

6 Replies

5500 Views

Last post by J64C
Wed Aug 16, 2023 11:08 am
Capacitors

Last post by No True Scotsman « Sat Aug 12, 2023 4:56 pm
Replies: 8
by allisonlastname » Tue Jul 04, 2023 5:12 pm

8 Replies

6512 Views

Last post by No True Scotsman
Sat Aug 12, 2023 4:56 pm
Quickest method to detect 8 bit zero using discrete ICs

Last post by Dr Jefyll « Sat Jul 15, 2023 9:30 pm
Replies: 36
by AndrewP » Fri Jul 07, 2023 12:53 pm
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36 Replies

23688 Views

Last post by Dr Jefyll
Sat Jul 15, 2023 9:30 pm
Don Lancaster's Apple II Books

Last post by barnacle « Fri Jul 07, 2023 7:42 pm
Replies: 8
by cjs » Wed Mar 04, 2020 2:07 pm

8 Replies

10780 Views

Last post by barnacle
Fri Jul 07, 2023 7:42 pm
Need Help with some UARTs

Last post by Yuri « Mon Jun 12, 2023 7:11 pm
Replies: 61
by Yuri » Tue Feb 28, 2023 11:51 pm
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61 Replies

54495 Views

Last post by Yuri
Mon Jun 12, 2023 7:11 pm
Interfacing with TTL?

Last post by barnacle « Fri Jun 09, 2023 6:17 am
Replies: 18
by Yuri » Sat Jun 03, 2023 7:30 pm
1

2
18 Replies

22864 Views

Last post by barnacle
Fri Jun 09, 2023 6:17 am
W65C816S dual CPU/DMA (Kohlbecker breakout based).

Last post by AlanCanon « Fri Jun 09, 2023 4:25 am

by AlanCanon » Fri Jun 09, 2023 4:25 am

0 Replies

30722 Views

Last post by AlanCanon
Fri Jun 09, 2023 4:25 am

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