| Author |
Message |
Forum: Newbies Topic: Using a 65C816 in place of a 65C02 |
| jds |
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Posted: Wed Jun 15, 2016 4:13 am
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Replies: 12
Views: 2253
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| I've got a 65C02 on my breadboard at the moment, but decided to replace it with a 65816. I always planned on building a 6502 system and then a 65816 one, but I figure I might as well just start with the '816. I'll start off using just the 16-bit bus to keep it simple. This means I don't need to latc... |
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Forum: Programming Topic: 128 bit Floating Point 65C816 implementation |
| granati |
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Posted: Mon May 23, 2016 6:58 pm
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Replies: 43
Views: 14664
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| Hello everyone. i'm developing a floating point unit for 65C816 compliant with IEEE754 quadruple precision. At this time these functions are full implemented: - fpadd, fpsub, fpmult, fpdiv (basic operations) - fprexp (extract exponent), fscale (scale ... |
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Forum: Newbies Topic: How fast can the 65C02 or 65C816 run with "cycle stealing"? |
| cbmeeks |
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Posted: Thu Feb 25, 2016 6:48 pm
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Replies: 15
Views: 6349
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| So I was reading about different architectures and DMA / cycle stealing came up a few times. What I'm referring to is how a device, like a video controller, would access RAM during low phase (IIRC) of the CPU cycle. Allowing the video controller and CPU to use the RAM at effectively the same time. I... |
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Forum: Newbies Topic: Simple 65C816 SBC with 512K? |
| cbmeeks |
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Posted: Fri Feb 12, 2016 2:13 pm
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Replies: 9
Views: 1540
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| My searching skills have failed me. Does anyone have schematics for a simple SBC that uses a 65C816 and 512K of SRAM? Doesn't have to be exactly 512K. Just anything more than 64K...but not anything super large like 4MB. I've got some 128K and 512K SRAM chips gathering ... |
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Forum: Forth Topic: Best register usage for 65C816 Forth? |
| BitWise |
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Posted: Fri Feb 12, 2016 11:56 am
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Replies: 24
Views: 15098
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| I've been working on a 65C816 based direct threaded Forth for a while and was following the 65(C)02 approach of keeping the data stack pointer in X but wasn't happy with the resulting code so at the weekend I decided to try a new approach. ... |
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Forum: Programming Topic: 65C816/802 bytecode interpreter |
| commodorejohn |
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Posted: Thu Jan 21, 2016 8:02 pm
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Replies: 7
Views: 2363
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| I've been scheming up a project for a while now for a small portable computer (think Tandy Model 100) based around the 65C816 and incorporating 64KB of MRAM I got as a free sample (thank you, Everspin!) Since it's not necessarily going to incorporate any other form of on-board storage ... |
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Forum: Hardware Topic: Test setup for 65C816 processor |
| i_r_on |
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Posted: Wed Jan 20, 2016 9:31 pm
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Replies: 29
Views: 3312
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| Sorry if this is asked before, I've searched the forum but couldn't find a direct topic related to this. I just bought a bunch of cheap 65C816 processors from China. I want to test them before I confirm the transaction if they are dodgy/broken or not. (They are Winbond made labeled W65C816S8P-14) ... |
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Forum: Hardware Topic: 65C816 project |
| banedon |
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Posted: Sun Dec 06, 2015 9:14 pm
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Replies: 28
Views: 2419
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| While I wait for my 65C02 GPD project to be fabricated, I'm looking at making my first 65C816 project. I intend the following: - Run the MPU in native mode - Utilise the full memory map of 16MB - Possibly split the project into two PCBs (due to size) - Employ 2 VIA ... |
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Forum: General Discussions Topic: Guide to 65C816 Opcodes |
| BigEd |
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Posted: Fri Oct 02, 2015 4:25 pm
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Replies: 12
Views: 1351
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| Bruce Clark's long and detailed document about the 65C816 opcode behaviour is now available online - see the Tutorials and Primers section of the site. It's mostly about the native modes, and goes into some detail on the exact behaviour. He called ... |
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Forum: General Discussions Topic: The 65C816 is yucky! |
| BigDumbDinosaur |
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Posted: Fri Sep 25, 2015 6:50 pm
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Replies: 58
Views: 6225
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| Over in another topic , discussion has ensued concerning a member's "dislike" of the 65C816 . To wit: Much of what I dislike about the 65816 stems from the different design choices they made compared to the 68000. Here is a brief list: ⋅ 8-bit data ... |
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Forum: Hardware Topic: She: A Small Expandable 65c816 computer |
| BigEd |
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Posted: Mon May 25, 2015 7:51 pm
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Replies: 2
Views: 645
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| Might be of interest: What could be more fun than than to build a nice 65c816 computer. The core system has 1M SRAM, 256K EEPROM, Serial, VGA, RTC and SD card Interface. Open Architecture allows memory expansion, Commodore SID board or other "cool" ... |
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Forum: Hardware Topic: Some questions about adding an MMU to a 65c816 project |
| zamuel_a |
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Posted: Thu Apr 30, 2015 9:51 am
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Replies: 10
Views: 1046
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| ... smaller 6502 based projects in the past, but want to create something more advanced, like a "real" computer and thought about using the 65c816 since it would be easier to handle a lot of memory (and it's faster to). I would like to create a simple multitasking OS, so it had been nice ... |
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Forum: Programming Topic: 65C816 PROGRAMMING TIPS & TRICKS |
| BigDumbDinosaur |
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Posted: Mon Feb 16, 2015 6:19 am
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Replies: 57
Views: 7716
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| 65C816 PROGRAMMING TIPS & TRICKS Although not as well documented as the 6502 and 65C02, quite a bit of information is available on the 65C816, especially in the Eyes and Lichty programming manual that is available for ... |
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Forum: General Discussions Topic: 65c02 / 65c816 embedded video processing |
| APL |
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Posted: Thu Oct 30, 2014 3:24 pm
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Replies: 0
Views: 1969
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Would the-
1) 65c02 running at higher clock rates,
2) 65c816
-ever be considered for embedded video processing.
I'm thinking of cctv type application not image processing.
Can anyone point to a CCTV manufacturer that uses either of the 65c family? |
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Forum: Programming Topic: Binary Search for 65C816 |
| BigDumbDinosaur |
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Posted: Fri Jun 27, 2014 7:21 pm
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Replies: 2
Views: 725
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| In the process of getting from one place to another, I needed to concoct a binary search algorithm for the 65C816 running in native mode. The job was to look up display control "mnemonics" (actually parameterless macros) embedded in text strings and then send an escape ... |
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