| Author |
Message |
Forum: General Discussions Topic: New Project: 65c816 Soft SoC with Serial SRAM 23LC512 |
| Jmstein7 |
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Posted: Thu Oct 21, 2021 10:58 pm
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Replies: 24
Views: 1641
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| Hi, all - long time. I just uploaded the above-captioned project to GitHub ( https://github.com/jmstein7/soft_65c816_core_SoC_23LC512 ), and I thought some of you might be interested in toying with it. Here is the description: This project comprises a 65c816 Soft Core SoC with ... |
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Forum: General Discussions Topic: Survey of '816 systems... (65816 / 65C816) |
| drogon |
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Posted: Fri Oct 01, 2021 10:26 am
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Replies: 22
Views: 2358
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| In another thread I mooted a separate thread to maybe find out just how many 65816 systems there are, so I'll start with what I know: Older, commercial systems: ⋅ Acorn Communicator - 1985 ⋅ Apple IIgs - 1986 ⋅ Super Nintendo entertainment System (SNES) 1990 Modern ones... |
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Forum: General Discussions Topic: ACIA Works for 65c02, not for 65c816 with same settings? |
| Jmstein7 |
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Posted: Sun Sep 19, 2021 3:01 pm
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Replies: 22
Views: 1438
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| ... clock, along with a 1.8432hmz connected to the ACIA, RTL or physical, it works just fine, no problem. However, when I swap out the 65c02 for a 65c816, I run into trouble. I tested the setup with the VIO (effectively a logic analyzer I can single-step) on my Xilinx CMOD A7, and I've confirmed ... |
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Forum: General Discussions Topic: Simple Question: 65c816 - Part Deux! |
| Jmstein7 |
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Posted: Fri Sep 17, 2021 4:27 pm
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Replies: 8
Views: 1716
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| ... you guys said, the B side faces the CPU and the A side faces outward to the bus. Then, I implemented the bank address capture scheme found in the 65c816 data sheet, through a 74HC573: https://photos.google.com/u/2/share/AF1QipM1BPMjKumR_siFSWqlkTik-T303uN3s1Gt12JGhWNUjX1JeWQdzOpDRnCW4SYbyQ/photo/AF1QipPj8f0Ns84LB3bV0qJ7HQzPTrY5j_BKv1Gujbwa?key=MEEyV0kxR1JZT0xkVklickNfR19jZFRMZmxFOERn ... |
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Forum: General Discussions Topic: Simple Question: 65c816 Memory Decode Logic |
| Jmstein7 |
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Posted: Sun Sep 12, 2021 8:39 pm
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Replies: 18
Views: 3170
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| Very basic question (I think). As a side-project, I am just trying to wire up my first, basic 65c816 SBC. When reading the datasheet, I noticed that Write Data becomes valid some time after the positive edge of PHI2, and Read Data becomes valid thereafter, when PHI2 goes ... |
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Forum: General Discussions Topic: New videos on the 65C816 |
| cbmeeks |
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Posted: Fri Sep 10, 2021 12:01 pm
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Replies: 20
Views: 1821
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The 65C816 doesn't get much YouTube love (and, honestly, the 65C02 could use even more).
Anyway, YouTube actually did something I couldn't believe. It actually recommended a video that turned out to be something I enjoy! Perhaps you will too.
https://www.youtube.com/c/AdrienKohlbecker |
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Forum: Newbies Topic: 65c816 "Core" |
| GamerFox |
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Posted: Sat Aug 28, 2021 9:35 pm
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Replies: 79
Views: 4491
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| I've been meaning to make an '816 based project that's running at 4 MHz and I've cobbled together this MPU and timing "core" the system will use. Is using 74HC's okay for this and will the timing work? |
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Forum: Programming Topic: SIZING EXTENDED MEMORY IN A 65C816 SYSTEM |
| BigDumbDinosaur |
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Posted: Fri Aug 27, 2021 5:26 am
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Replies: 18
Views: 1495
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| This topic might be of interest to anyone planning on building a 65C816 system with more than 64 kilobytes (KB) of memory. The discussion assumes the 816 is running in native mode. In my POC units up through V1.2, there was never more than 64 KB of address ... |
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Forum: Newbies Topic: Help with WLA DX for 65C816 |
| iamgrazzi |
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Posted: Thu Jul 08, 2021 1:23 pm
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Replies: 3
Views: 647
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| ... over the past few months, so first of all, thank you! After exciting success using the 65C02 for a while, I have decided to enter the world of the 65C816 and I am very excited about it. However, I can't for the life of me figure out how to get my code ROM-ready. I'm trying to use WLA DX and come ... |
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Forum: Programming Topic: Simple Heap Manager for 65C816 |
| granati |
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Posted: Sun Jan 24, 2021 4:41 pm
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Replies: 0
Views: 5661
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| Developing a native pascal/c compiler for 65c816 one problem is implement new()/dispose() procedures and malloc()/free() functions that take advantage of large memory addressable by cpu. In attached file an attempt of a possible implementation ... |
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Forum: Hardware Topic: New modular design 65c816 based with Supermon816 |
| xjmaas |
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Posted: Tue Jan 12, 2021 9:33 am
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Replies: 31
Views: 1739
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| Based on the RC2014 and my previous "design", Lilith, I created a new project: Adria, a modular computer. Adria is, currently, running Supermon816 as monitor, but with an Intel Hex uploader from ROM. The first version/revision is complete through hole. I had JLCPCB develop the PCBs, easy, ... |
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Forum: Newbies Topic: 65C816 board glue logic issues? |
| HalfBurntToast |
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Posted: Fri Dec 04, 2020 10:54 pm
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Replies: 16
Views: 1442
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| Hi everyone. Long time lurker, first time poster here. I've been trying to design a 65C816 computer for a while now and I'm running into some issues that I think go beyond a mistaken connection. I've sent two versions of this computer in for fabrication. The first ... |
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Forum: Newbies Topic: new 65C816 build |
| mikeblas |
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Posted: Mon Oct 19, 2020 4:17 pm
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Replies: 11
Views: 1116
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| ... on the expansion board. Anyway, now that I'm retired, I've been thinking about making my own computer from scratch. For now, I'm considering a 65C816, though I might breadboard a 6502-based machine to get started. I'm not yet done reading the 65C816 manuals (and I'm a bit surprised I have to ... |
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Forum: General Discussions Topic: A new cheaper version of the C256 Foenix (65c816) system... |
| drogon |
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Posted: Thu Oct 15, 2020 4:06 pm
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Replies: 0
Views: 1335
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Forum: Hardware Topic: JGG 65C816 Single Board Computer |
| JuanGg |
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Posted: Wed Jul 29, 2020 1:07 pm
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Replies: 8
Views: 1173
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| The objective: ------------------ A 65C816 based SBC, with built in VGA and keyboard interface, UART, and some sort of mass storage. I want it to be as self-contained as possible, meaning that it should be able to operate without being connected ... |
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