appler
hbc-56
| appler | hbc-56 | |
|---|---|---|
| 17 | 38 | |
| 251 | 175 | |
| - | - | |
| 1.9 | 8.2 | |
| about 1 year ago | 9 days ago | |
| Assembly | Assembly | |
| Boost Software License 1.0 | MIT License |
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appler
hbc-56
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Alternative designs for a keyboard interface?
I use a PIC16F microcontroller. Schematics and PIC code in my HBC-56 repo. https://github.com/visrealm/hbc-56
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After Wozmon I want to create a game - 6502
If you're keen to add a VDP as u/production-dave suggested, I have schematics and a bunch of code in my HBC-56 GitHub repo
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using an atmega micro-controller for managing multiple interrupts?
Schematics are here https://github.com/visrealm/hbc-56/tree/master/schematics/6502
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TSM9918A | Questions asked by a friend without Reddit
The schematics for my TMS9918A display card are in my github repo. It uses a single SRAM instead of the original DRAMs. The circuitry between the TMS9918A and the TV is just a simple transistor follower circuit (shown in the schematic): https://github.com/visrealm/hbc-56/tree/master/schematics/tms9918
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Small PS2 adapter
So this is really just cobbled together from this project by u/visrealm https://github.com/visrealm/hbc-56
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Is my new second hand ps/2 keyboard broken?
I've actually just ordered the perix perrino 409 that sends the AA after self test. The HP keyboard definitely doesn't seem to be working. My plan is to interface it with a PIC microcontroller by copying the setup here: https://github.com/visrealm/hbc-56. from u/visrealm
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6522 Shift register?
It looks like a shift register can be used in connecting a NES controller but likely isn't the full story. Check out u/visrealm's HBC build. He uses separate shift register chip to connect to a NES but maybe the 6522 can be used in a similar way.
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After watching Matt Heffernan's Mandelbrot Battle Royale, I thought I'd give it a go on my HBC-56 (65C02 @ 3.6864MHz + TMS9918A). Four modes: 32x24, 64x48, 64x192 and 256x192 (sort of). . I still need to work on improving color bleeding in the final Graphics II mode. A bit of fun.
It's Assembly. https://github.com/visrealm/hbc-56/tree/master/code/6502/mandlebrot
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4 cards down, 1 to go. No real issues since the R/W switch on the CPU card.
I have most schematics, software, emulator, etc on github. https://github.com/visrealm/hbc-56
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Five new cards arrived today. Hopefully I didn't make too many mistakes...
These are for a 6502 build. https://github.com/visrealm/hbc-56
What are some alternatives?
unzx0_x86 - Free, zlib licensed ZX0 decompressor for the x86
TMS9918A - TMS9918A video card for RC2014
apple2_hgrbyte - Explore the Apple 2 HGR amd DHGR esoteric screen layout with bit twiddling and byte manipulation.
RomWBW - System Software for Z80/Z180/Z280 Computers
a2d - Disassembly of the Apple II Desktop - ProDOS GUI
spectrum-desolate - 🕹️ Ported Desolate game from TI-83 Plus to ZX Spectrum
TaliForth2 - A Subroutine Threaded Code (STC) ANS-like Forth for the 65c02
6502 - Code for the 6502 microprocessor, mostly for the Replica 1 computer.
GW-BASIC - Assembling Microsoft GW-BASIC from 1983, with MASM or JWasm • "pre-release" binaries at https://codeberg.org/tkchia/GW-BASIC/releases • source mirror of https://codeberg.org/tkchia/GW-BASIC • fork of https://github.com/dspinellis/GW-BASIC
vrEmuLcd - Character LCD emulator library (C99 engine, web front-end).
6502 - 6502 breadboard computer designed by Ben Eater
6502 - DB6502: 65C02 based computer inspired by BE6502