| Author |
Message |
Forum: Hardware Topic: 65C816 on the 16 bit ISA bus |
| N2- |
|
Posted: Fri Jun 05, 2020 7:42 am
|
|
Replies: 10
Views: 1058
|
| So I've been pondering how to go about wiring up an ISA card for a 65c816 CPU card for use on the ISA bus. I'd like to make use of the entire 24 bit address range and a latch for the higher data bits. My question is how to get an accurate spec to work with ... |
|
 |
Forum: Newbies Topic: 65C816 project -- did I design the board correctly? |
| robbie |
|
Posted: Mon Apr 06, 2020 9:37 am
|
|
Replies: 11
Views: 1204
|
| Hello! I want to embark on a 65C816-based computer project. I made a schematic of the computer with the RAM and ROM as well as the glue logic, and I was about to put in two VIAs until I realized that I didn't want to have to route and place ... |
|
|
Forum: Newbies Topic: 65c816 address decoding help |
| Skylie33 |
|
Posted: Tue Mar 31, 2020 3:48 am
|
|
Replies: 85
Views: 5412
|
| Hello members of the 6502 forum! I'm designing my first SBC computer, and I opted for the 65c816 over the 6502 despite the quirks for numerous reasons, one being RAM. It's quite an ambitious project, but I'm certain it will turn out great in the end. It will primarily ... |
|
|
Forum: Programming Topic: 65c816 (opinionated) assembler showdown |
| enso |
|
Posted: Wed Nov 20, 2019 10:48 pm
|
|
Replies: 48
Views: 9083
|
| I've been taste-testing assemblers for '816 and so far every one I've tried (with a few lines of assembly) has at least something wrong with it (or my understanding of how to use it, more likely). Please correct any misconceptions/misunderstandings or add suggestions (I will try to keep this message... |
|
|
Forum: Hardware Topic: My 65c816 SBC project... |
| drogon |
|
Posted: Mon Aug 12, 2019 8:45 pm
|
|
Replies: 25
Views: 2795
|
| ... of all those '816 instructions if you need them - I now wish I had, however knowing that it's just a one resistor change to go from 65C02 to 65C816 wasn't that bad, really. |
|
|
Forum: Programming Topic: Running 'legacy' code in 65C816 native mode? |
| drogon |
|
Posted: Sat Jul 20, 2019 8:16 pm
|
|
Replies: 6
Views: 811
|
| Wondering if anyone has had any luck (or even tried!) to run existing 6502/65C02 code on a 65C816 when in native mode with 8-bit registers set? I've "upgraded" My Ruby 6502 system to a Ruby 816 system and it's running well - still with 64K of RAM and still ... |
|
|
Forum: Emulation and Simulation Topic: A (very) cheap 65C816 emulator |
| BitWise |
|
Posted: Thu Jun 27, 2019 8:50 am
|
|
Replies: 3
Views: 1089
|
| For sometime now I've been working on a new 65C816 emulator that runs on a cheap ESP32 module. The code base is almost ready to release -- I just have to finish the monitor application (based on my SXB-Hacker) so you can upload code into the RAM ... |
|
|
Forum: Newbies Topic: 65c816 computer? |
| nodelink |
|
Posted: Mon Jun 10, 2019 9:52 am
|
|
Replies: 8
Views: 1087
|
| Hi, I don't know much about this sort of thing, but I have been looking for a system that runs on a die that is of a larger process like the 65c816 (0.6um) which is for long long long term stability purposes. I wonder, I have heard that using it's full 16mb potential one would have to use bank ... |
|
|
Forum: Hardware Topic: C256 Feonix (65C816 based) |
| Jeff_Birt |
|
Posted: Tue May 14, 2019 2:24 pm
|
|
Replies: 0
Views: 2592
|
| C256 Feonix You may have heard of this project before. I'm not officially involved but did sign up for a dev kit. It is a modern implementation of a 'what if Commodore had made a successor to the C128'. The C256 Foenix is to the C64 what the Apple II GS is to the original Apple II. I'm just mentioni... |
|
|
Forum: Programming Topic: ISR for UART 16C550 - 65C816 |
| granati |
|
Posted: Fri May 03, 2019 5:09 pm
|
|
Replies: 2
Views: 1000
|
| A simple ISR for uart 16c550 + 65c816 is here: http://65xx.unet.bz/c16sw/ Uart work in fifo mode, can handle these baud rates: 38,400 - 57,600 - 115,200 - 230,400 (uart clocked at 3.6864Mhz), and allow both hardware handshake (through standard ... |
|
|
Forum: Programming Topic: How does this piece of 65C816 assembly code work? |
| rchoudhary |
|
Posted: Wed Apr 10, 2019 8:09 pm
|
|
Replies: 8
Views: 1037
|
| I am working with assembly for the 65C816, specifically to make a SNES ROM. In a guide I found online there was some code to set the background color. The SNES supports 16-bit color so the format is as such: 0bbbbbgggggrrrrr It said that the ... |
|
|
Forum: Programming Topic: 65C816 SW: printf() family functions |
| granati |
|
Posted: Fri Apr 05, 2019 2:52 pm
|
|
Replies: 1
Views: 557
|
| Hello, i'm developing a "c-like" printf() family function, in assembler, for the 65c816 uP. Six function are in develop here: 1) cprintf(lpFmt, ..., wCount) - format parameters basis the format string and print on console 2) tprintf(lpFmt, ..., wCount) - print ... |
|
|
Forum: Programming Topic: First build 65c816 based machine programming |
| backspace119 |
|
Posted: Wed Mar 20, 2019 5:18 pm
|
|
Replies: 28
Views: 1377
|
| So I've got my mega based eeprom writer working, and I'm probably about 25-40% done with my assembler, but in the mean time, I'm going to work on a few small hand written programs to test out my new machine. I've setup a NOP generator on my ROM that goes as so: Start Vector: 00 C0 (my eeprom starts ... |
|
|
Forum: Emulation and Simulation Topic: Another 65C816 Emulation |
| BitWise |
|
Posted: Sun Mar 03, 2019 10:47 am
|
|
Replies: 4
Views: 1101
|
| Inspired by the 8-bit guy's project I've been thinking about how to build a cheap 65c816 system and I've decided to do it as an emulation. Hunting around for a PIC32MZ development board I found this. https://www.mikroe.com/mini-32-for-pic32mz A 252MHz (415DMIP) 32-bit ... |
|
|
Forum: Programming Topic: IMPLEMENTING AN OPERATING SYSTEM API IN A 65C816 SYSTEM |
| BigDumbDinosaur |
|
Posted: Tue Jan 15, 2019 10:59 pm
|
|
Replies: 19
Views: 3856
|
| ... topic on discussion over here about methods of implementing an A pplication P rogramming I nterface (API) to an operating system running on the 65C816 in native mode. By way of explanation for those who aren't up to speed on operating system internals, the theory behind an API is the application ... |
|
|
| Sort by: |
Login
Register
FAQ
Search