This project is about a Commodore PLA replacement.PLA replacements for the Commodore 64 are available for quite a number of years and have grown increasingly sophisticated. Therefore you may ask why the world would need another PLA, and indeed, current available alternatives are technically sound. However, if you occasionally repair a Commodore 64, you will come to the realisation that you need spare PLAs on stock. Now I'm not saying people that make PLAs are overcharging, in fact, I believe for the work the makers put into them, you might already be receiving more than you pay for. However,ordering 10 PLAs somewhere for just for your own stock will cost you a fair amount of money, enough to make it not fun anymore.Looking at this dilemma I did conclude I would need to make my own PLAs. I could clone an existing one, but instead took a look at well available parts that are easy to solder and program by commonly available tools. I saw a possibility with GALs and started work on my own PLA, and I did succeed.GALs are available at very low cost on popular internet marketplaces can be programmed using the popular TL866 EPROM programmer. They are DIP devices and can therefore be soldered by novice solderers. A PCB is needed that wires the GALs together in the right way and for that you have come to the right place.The required fusemaps and more information is available here:http://www.freepascal.org/~daniel/c64pla/Recommended manufacturing options:Thickness: 1.0mmSurface finnish: HASL lead-freeSolder mask colour: BlackIf you order a panel, route-process: V-scoringFor all other options, please select the defaults

COMMODORE C64 CHARACTER GENERATOR ROM REPLACEMENT ADAPTER (FOR REPLACING 901225-01) Gerbers updated as REV2 on 22.10.2020. Please update your unpaid orders. Hello, This ROM adapter is suitable for replacing Commodore64 Character Generator ROM (For replacing 901225-01)You can download Eprom Images from this link:https://archive.org/download/chr-eprom/CHR_EPROM_BIN.zipPs. In order to use this character generator ROM replacement adapter, your Commodore 64's 901225 chip have to be desoldered and socketted.If you need 8x8KB Commodore 64 replacement adapter for 901226-01 BASIC ROM and 901227-03 KERNAL ROM, it is hereIn terms of device and software security; please turn your Commodore64 off before switching ROMs.For any questions please e-mail me : c64istanbul@bikom.comGerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.COMPONENTS:W27C512 or 27C512 or 27c256 or 27c128 or 27c644 PCS. 10K 1/8 WATT RESISTANCE2 PCS. 12-PIN 2.54mm ROUND MALE HEADER4 PCS. 2-PIN 2.54mm MALE HEADER 4 PCS. 2.54mm JUMPER CAP 28-PIN WIDE DIP IC SOCKET 24-PIN WIDE DIP IC SOCKET (FOR computers motherboard )And you will need an eprom programmer to program 27c512 Gerbers updated 22.10.2020

(DIY) THE FINAL CARTRIDGE III+ FOR COMMODORE 64 This is a tested and working project.This The Final Cartridge 3 Plus PCB is an Easy DIY project, all components are through hole and marked on the PCB, it is easy to solder, easy to make ;) The Final Cartridge III was a popular extension cartridge which was created for the Commodore 64 and Commodore 128, it can be operated on the Expansion port of the C64 or the C128. It was developed in 1987 from the Dutch company RISKA B.V. Home & Personal Computers (based in: Rotterdam in the Netherlands). It provides over 60 new functions to the C64-user (e.g. BASIC-Extension, Fastloader and -saver for the 1541 with an acceleration factor of 10, Freezer, Monitor). Additionally there is a graphical user interface (Desktop) with windows (similar to GEM or Windows). From the hardware there is a Reset- and a Freezer-Function, allowing the program execution to be stopped to be resumed later. Thanks to the original Producer: RISKA B.V. Home & Personal Computers (1987-1993)You can download 256KB and 64KB EPROM images from this link.https://archive.org/download/TFC3PLUSEPROM/TFC3PLUS_BINARIES2.zipRelated Links:https://s-o.webnode.cz/vykopavky/c64/https://rr.pokefinder.org/wiki/Final_Cartridgehttps://www.c64-wiki.com/wiki/Final_Cartridge_3https://www.c64-wiki.de/wiki/Final_Cartridge_3https://en.wikipedia.org/wiki/The_Final_Cartridge_IIIEnglish User Manualhttps://rr.pokefinder.org/rrwiki/images/7/70/Final_Cartridge_III_english_Manual.pdfIn order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have FunThank you.COMPONENTS:27C020 (27C2001) DIP32 or 27C512 for plain version74LS273 DIP2074LS163 DIP1674LS133 DIP1674LS04 DIP1474LS09 DIP14DIP32 IC SOCKET1nF Capacitor1μF Capacitor10μF Capacitor5pcs. 1N4148 DIODE1.2K Resistor18k Resistor3pcs. 4.7K ResistorLED3pin male headerjumper cap2pcs. RIGHT ANGLE TACTILE BUTTONYou will need a programmer for EPROMIf your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)

SD2iEC & EPYX FAST LOAD CARTRIDGE V2 (TQFP) This, SD2iEC & Epyx Fast Load Cartridge V2 PCB is also available for TQFP package ATMEGA644P and ATMEGA1284, if you like, you may prefer to use TQFP package AT644P or AT1284, they are usualy cheaper and easy to find than DIP package models.Other instructions are the same with first version.https://www.pcbway.com/project/shareproject/_DIY__SD2iEC___EPYX_FAST_LOAD_CARTRIDGE_FOR_COMMODORE_64.htmlIf you want to program TQFP ATMEGA onboard then you should use DIP40 pins for ICSP connections. I used ATmeag644P and ATmega1284P compatible TQFP44 to DIP40 adapter Programmer socket, from aliexpress.comDIP40 pin 6 = MOSI DIP40 pin 7 = MISO DIP40 pin 8 = SCK DIP40 pin 9 = RST DIP40 pin 10 = VCCDIP40 pin 11 = GNDIn order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.

AMIGA PS/2 MOUSE CONVERTER (ADAPTER) - PIC16F628(A)Hello,This is a tested and working circuit board .If you have a PIC16F628(A) and a PIC-Programmer, you can make your own Amiga PS/2 mouse converter adapter, with this circuit-board easily.This Amiga PS/2 Mouse Converter adapter supports; three mouse buttons, most of optical PS/2 mice and some of USB mice (supporting PS/2 communication protocols) (with a simple and cheap USB to PS/2 converter.)You need to download .HEX file and program it in to PIC16F628(A), from this link,https://archive.org/download/amiga-ps-2-mouse-pic-16-f-628/AMIGA_PS2_MOUSE_PIC16F628.zipIn order to protect your electronical devices, always turn off your Amiga before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank youPS. Gerbers updated for technical reasons 09.06.2020COMPONENTS:PIC16F628A or PIC16F628DIP18 IC SOCKETDB9F D-SUB 9 PIN FEMALE CONNECTOR - You may remove the metal cover if needed (for A600)6PIN RIGHT ANGLE PS/2 FEMALE PCB TYPE MINI DIN CONNECTOR100nf CAPACITOR

C64 EPROM PROGRAMMER (DELA EPROMMER II - REDRAWN)DELA EPROMMER II is a eprom programmer for Commodore 64This is a tested and working circuit board.This is an Easy DIY circuit board, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;) This Dela Eprommer II circuit board is redrawn as original product.Dela Eprommer II was a very popular eprom programmer for commodore 64Dela Eprommer II eprom programmer works on Commodore 64 User Port.You can program 2716, 2732, 2764, 27128, 27256 eproms with 12V, 21V, 25V VPP voltages with this programmer.You can chose two different programming algorithms; fast and normal (50ms/byte). For some old eproms you can chose normal (50ms/byte) programming mode. There are also "One Byte Programming" and "eeprom erasing" functions.Always, turn your Commodre-64 power off before pluging or unpluging this eprom programmer.You can download DELA EPROMMER II software and some manuals from this link. (German Language)https://archive.org/download/eprommer-ii/EPROMMER_II.zipMany thanks to Dela Elektronik GmbH for this great C64 eprom programmer.Do not put an EPROM in the EPROMMER before Eprommer II Software started.Commodore 64 file system records 2 bytes start adress header at the beginning of the files, but PC recorded .BIN files do not have these 2 Bytes, this difference can cause problems.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.COMPONENTS:2 pcs CD4040 (DIP16)7406 (DIP14)74LS373 (DIP20)7805 (TO-220)6 pcs. BC237 (TO-92)BC558 (TO-92)28 pin wide ZIF socket (DIP28)DIP20 IC socketDIP14 IC socket2 pcs. DIP16 IC socketRED LED4 pcs. 1N4002 DIODE3 pcs 1N4148 DIODE8.2V ZENER DIODE7.5V ZENER DIODE5.6V ZENER DIODE680 OHM 1/4 watt RESISTANCE2 pcs. 1K 1/4 watt RESISTANCE9 pcs. 10K 1/4 watt RESISTANCE2 pcs. 470μF 50V electrolytic capacitor470μF 35V electrolytic capacitor100μF 35V electrolytic capacitor (updated from 25V to 35V 08.12.2020)10μF 16V electrolytic capacitor805-24p 2x12pin 3.96mm Pitch CARD EDGE CONNECTOR2 pcs. screw and 4pcs nut (for 2 legs)

(DIY) SD2iEC & EPYX FAST LOAD CARTRIDGE FOR COMMODORE 64This is a tested and working project.This is an Easy DIY project, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;) SD2iEC (Commodore disk drive emulator) and Epyx Fast Load Cartridge (the most popular "disk fast loader" for Commodore 64). Now they are togetger on one PCB.Actually, this PCB is a combination of two independent projects, one of them is SD2iEC (Commodore disk drive emulator) and the other is Epyx Fast Load Cartridge. They can be used separately or both together. A lot of experienced Commodore users prefer EPYX FASTLOAD, because of its high compatibility with Commodore hardware and software. While working with Commodore's original Disk Operating System, Commodore Disk drives (1541, 1571...) or disk drive emulators (SD2iEC, Pi1541...) loading is slow. Epyx Fastload Cartridge increases the loading speed remakable rate.Average Loading Speeds Comparison:Normal C64 Loading: 500 bytes per secondEpyx Fastload (SD2iEC): 8000 bytes per secondHere is; 180 blocks (45KB) loading video, from SD2iEC, with using Epyx Fastload:https://www.youtube.com/watch?v=sfkIw4P4sD0EPYX FASTLOAD CARTRIDGE also contains disk utilities and a machine code monitor for Commodore 64.https://en.wikipedia.org/wiki/Epyx_Fast_LoadYou can download Epyx Fast Load Cartridge Binary Eprom Image and user manuals from this link.https://archive.org/download/epyx-fast-load-1984-v-2-roms_202005/Epyx_FastLoad_1984_v2_ROMS.zipOriginal SD2iEC is designed by Lars PontoppidanWith SD2iEC, from an regular SD Card; you can use D64, M2I, PRG, D71, D81 and P00 ... extensions, Commodore 64 floppy disk images and program files. SD2iEC is easier to use and faster than its competitors. You can use SD Card as a huge capacity floppy or hard disk drive, you are not obligated to mount D64 disk images, you can load and save easly.You can search and find alot of information about "how to use SD2iEC" in the internet.SD2iEC Official Site is https://www.sd2iec.de/SD2iEC firmware download link: https://www.sd2iec.de/nightlies/ (Use firmware ...larsp-m1284p.bin or ...larsp-m644p.bin)MMC2IEC / SD2IEC - Evolutionen link: http://www.pitsch.de/stuff/mmc2iec/index.htm ** Before soldering SD Card Module you should place some isolation tape between PCB and SD card module. ** If you already have ATMEGA1284 or ATMEGA644 in TQFP44 package, then you have an option of using this TQFP44 to DIP40 adapter in the place of buying DIP40 package ones. Or you can order TQFP version of this PCB.** If you want to use SD2iEC unconnected to the C64 expansion port then you need to provide DC +5V power to the (+ -) pins on the PCB.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Ps. While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.ATMEGA1284 or ATMEGA644 FUSE SETUPCOMPONENTS:ATMEGA1284 or ATMEGA644 (DIP40)27C512 or W27C512 or 27C64 or 27C128 or 27C256 (DIP28) 74LS07 (DIP14)DIP14 IC SOCKETDIP28 WIDE IC SOCKET (for eprom)DIP40 WIDE IC SOCKET (for ATMega)2x8 pin SD Card Module ( NOT Micro SD module ! ) (will be placed to the bottom side)RED LEDGREEN LED2 PCS. 270ohm - 1K 1/4watt RESISTANCE (value changes leds brigtness)10K 1/4watt RESISTANCE2.7K 1/4watt RESISTANCE8 Mhz Passive Quartz Crystal1N4148 DIODE2 PCS. 33pf ceramic CAPACITORS6pin MALE DIN CONNECTOR6PIN MALE HEADER1PCS. HEADER JUMPER CAP4 PCS. RIGHT ANGLE TACTILE BUTTON6 PCS. 30cm MALE-FEMALE DUPONT CABLESD CARD (4GB will be enough)3 PCS. 2PIN MALE HEADER2 PCS. 100nF ceramic CAPACITORS1 PCS. 0.47μF CAPACITORYou will need a programmer for ATMEGA and EPROMIf your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)

COMMODORE 64 SD2iEC & KERNAL CART COMBOThis is a tested and working project. I think, SD2iEC (Commodore disk drive emulator) and Kernal Cart is a very good combination. They come together to make a complete Disk Operating System for your Commodore 64. Actually, this PCB is a combination of two independent projects, one of them is SD2iEC (Commodore disk drive emulator) and the other is KernalCart (Commodore's low-level Operating System ROM in cartridge form). They can be used separately or both together. If you want to use SD2iEC unconnected to the expansion port then you need to provide DC +5V power for the (+ -) pins on the PCB.Original SD2iEC is designed by Lars PontoppidanOriginal Kernal Cart is designed by SukkoPera While working with Commodore's original kernal ROM, The SD2iEC loads slow (like speed of original old Commodore 1541 disk drive). When you use 'SD2iEC Kernal' or 'JiffyDOS * Kernal' with your SD2iEC, the loading speed increases spectacularly.Average loading speeds comparison:Original C64 kernal : 500 byte/secondJiffy DOS Kernal: 10150 byte/secondHere is; 180 blocks (45KB) loading, with DolphinDos-patched-JiffyDOS, video:https://www.youtube.com/watch?v=6asuU_cAbqs Referral for SD2iEC; I used ozayturay's schematics https://github.com/ozayturay/EagleProjects/tree/master/SD2IECSD2iEC Official Site is https://www.sd2iec.de/SD2iEC firmware download link: https://www.sd2iec.de/nightlies/(Use firmware ...larsp-m644p.bin)SD2iEC Kernal 2.2 download link: https://csdb.dk/release/?id=159050 (Thanks to Claus)MMC2IEC / SD2IEC - Evolutionen link: http://www.pitsch.de/stuff/mmc2iec/index.htm Referral for Kernal cart; I used SukkoPera / OpenC64KernalCart project and Turbo DOS V3 cartridge PCB images.https://github.com/SukkoPera/OpenC64KernalCarthttp://blog.worldofjani.com/?p=3736 If you need, you can find more information from original project's sites, and you can find many more information from internet. On this PCB v1.02, I added an enable/disable switch (headers and jumper cap) for Kernal Cart, it is between 74LS30 pin-8 and 27c512 eprom pin-22. (Disabling KernalCart is required while using SD2iEC COMBO without CPU pin28 cable connection) To make this project, you have to program ATMEGA644P TQFP-44 and 27C512 dip28The link below contains some kernal ROMs like Dolphindos, Speeddos, SD2IEC v2.2 kernal ... and a sample 27c512 eprom image for testing. You can also run DEADTEST 781220 ROM file in 27c512 eprom .https://archive.org/download/c-64-kernals_202004/C64_KERNALS.zip* KernalCart is also compatible with JiffyDOS ROM, you can buy and use JiffyDOS 64 KERNAL ROM Image http://store.go4retro.com/jiffydos-64-kernal-rom-overlay-image/ ** Before soldering Micro SD Card Module you should place some isolation tape between PCB and SD card module.Many thanks to SukkoPera, Lars Pontoppidan and Ozay Turay for their great works.In terms of device and software security; please turn your Commodore64 off before switching Kernal ROMs.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Ps. While transfering data (reading or writing) from SD cards it should not be interrupted like power-off or Reset systems. Otherwise that may damage SD cards.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have FunThank you.COMPONENTS:ATMEGA644P TQFP-4427C512 or W27C512 DIP28 (maximum; 64KB is for 8x kernal ROM)DIP28 WIDE IC SOCKET (for eprom)74LS30 DIP14DIP14 IC SOCKET6Pin MICRO SD CARD MODULE (will be placed to the bottom side and needs isolation)RED LEDGREEN LED2 PCS. 270ohm - 1K 1/4watt RESISTANCE (value changes leds brigtness)10K 1/4watt RESISTANCE8 Mhz Passive Quartz Crystal1N4148 DIODE2 PCS. 33pf CAPACITORS6pin MALE DIN CONNECTOR6PIN MALE HEADER5 PCS. 2PIN MALE HEADER2 PCS. 3PIN MALE HEADER1PIN MALE HEADER2 PCS. HEADER JUMPER CAP3PCS. 3pin 2.54mm SPDT slide SWITCH3 PCS. 100nf CAPACITORS3 PCS. RIGHT ANGLE TACTILE BUTTON7 PCS. 30cm MALE-FEMALE DUPONT CABLEMICRO SD CARD (4GB will be enough)FUSE SETUPIf your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)

IMPOSSIBLE MISSION GAME CARTRIDGE for COMMODORE 64 Hello, This is a tested and working circuit board. This PCB is prepared for making Commodore 64 Epyx Impossible Mission game cartridge. All components are through-hole, easy to solder, easy to make. https://www.c64-wiki.com/wiki/Impossible_MissionThis C64 cartridge is based on C64 Magic Desk cartridge, modified for running a single autostarting game/program(.prg extension) on commodore 64. There is a 64KB eprom (27c512) on the cartridge. You can download eprom image from this link:https://archive.org/download/imp.miss.eprom/imp.miss.eprom.zipThere are different versions of this game for commodore 64. You can choose your favorite version and prepare your own eprom binary image using a special software. With this software you can prepare single autostarting file (without menu) eprom image .bin file. You can test the .BIN file with VICE emulator. Many tanks to Feandreu and zzarko. You can download the software from this link: https://github.com/Feandreu/mdeskcrtgenfspThis Magic-Desk Compatible Cartridge is based on msolajic's (Marko Solajic) "c64-magic-desk-512k" project. Many thanks to Marko Solajic.https://github.com/msolajic/c64-magic-desk-512kThis cartridge can also be used as; generic 64KB Commodore 64 magic desk compatible cartridge.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.COMPONENTS:27C512 DIP28 (W27C512)74LS02 or 74HC02 DIP1474LS273 or 74HC273 DIP20DIP28 WIDE IC SOCKETIf your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)

COMMODORE 64 DEAD-TEST 781220 & DIAGNOSTIC 586220 CARTRIDGEThis is a tested and working circuit board.DEAD TEST 781220 and DIAGNOSTIC 586220 Cartridges are two different cartridges for testing commodore 64 and finding hardware faults.The 586220 part of this cartridge is actually a standart 8KB Commodore 64 cartridge, locates between $8000 -$9FFFThe 781220 part of this cartridge is actually an 8KB Ultimax Commodore 64 cartridge, locates between $E000 - $FFFF Some the tests in Diagnostic 586220 needs harness, you can find more information from these links. Thanks to Jani and Sven.http://blog.worldofjani.com/?p=164http://blog.worldofjani.com/?p=879https://github.com/svenpetersen1965/C64-Diagnostic-Rev.-586220-Harness You can download Eprom images from this link:https://archive.org/download/2in1-c64-diagnostic/2IN1C64DIAGNOSTIC.zipThe 586220 Diagnostic Cartridge is not enough to test everything, I made some simple PCBs for you, to test the input / output ports.Dongle for Control PortsDongle for Cassette PortDongle for Keyboard ConnectorDongle for User PortIn order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you. Components:2pcs. 27c64 or 27c128 or 27c256 or 27c512 (DIP28)2pcs. DIP28 wide IC socket2pcs. 100nf capacitor2PCS. RIGHT ANGLE TACTILE BUTTON (For optional RESET)

COMMODORE 64 - BASIC ROM & KERNAL ROM REPLACEMENT ADAPTER REV.3DESIGNED FOR 901226-01 BASIC ROM and 901227-03 KERNAL ROM REPLACEMENT.Hello,This is a tested and working circuit board.This adapter is suitable for Commodore 64 24pin Basic and Kernal ROMsREV.3 PCB is a special narrow design that allows you to use three adapters side by side on the commodore 64 motherboard.You can find and download many different ROM files for your C64, from internet. This adapter lets you to use max. 8 (8 x 8KB) different ROMs in one 27C512 eprom.The link below contains 901226-01 BASIC ROM and 901227-03 KERNAL ROM images for eproms https://archive.org/download/c64-roms/C64_ROM_BINARIES.zipThis ROM adapter table is also compatible with JiffyDOS ROM, you can buy and use JiffyDOS 64 KERNAL ROM Image http://store.go4retro.com/jiffydos-64-kernal-rom-overlay-image/ In terms of device and software security; please turn your Commodore64 off before switching ROMs.Ps. In order to use this ROM adapter, your Commodore 64's ROMs have to be desoldered and socketed.If you need 16x4KB Commodore 64 Character Generator ROM replacement adapter for replacing 901225-01, it is hereGerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.COMPONENTS:27C512 (or W27C512) (FOR 8X ROM)3 PCS 10K 1/4 WATT RESISTANCE2 PCS. 12 PIN 2.54mm ROUND MALE HEADER3 PCS 2PIN 2.54mm MALE HEADER3 PCS 2.54mm JUMPER CAP28 PIN WIDE DIP IC SOCKET 24 PIN WIDE DIP IC SOCKET (FOR C64 BOARD )And you will need an eprom programmer to program 27c512

(DIY) ATARI 2600 MULTI GAME CARTRIDGE You can make your own custom Atari 2600 Multi Game Cartridge. Hello, This is a simple,DIY multi game Atari 2600 cartridge. It has 16 games capacity each 4 kilobytes, total 64KB. All components are through hole, marked on the PCB, Easy to solder, Easy to make ;) This is a tested and working circuit board. This cartridge is tested with Atari 2600 Jr. (PAL) Just select 16pcs. your favorite 4 Kilobytes games and make your own custom Atari 2600 Multi Game Cartridge. You can find many different ROM files on the internet by searching "Atari 2600 ROMS" or "Atari 2600 tosec" ROM files bigger than 4 kilobytes are not suitable for this cartridge, you can use only 2 or 4 kilobytes ROM files.If your ROM file is 2KB then you should append it to itself to make a 4Kb file. You can simpy do this with a "HEX-Editor" program.You should append the 4 Kilobytes 16pcs. ROM files each other, reaching to the size of EPROM capacity, by using a "HEX Editor" program. EPROM must be fully filled from $0000 to $FFFF You can download a sample EPROM image from this link:https://archive.org/download/atari2600-16x4kb/ATARI2600_16X4KB.zipIn order to protect your electronical devices, always turn off your ATARI 2600 before inserting or removing cartridges.ALWAYS TURN YOUR ATARI OFF BEFORE CHANGING/SWITHING BETWEEN DIFFERENT ROMS!If your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!This PCB design is based on Joe 'Kingpin' Grand's Atari cartridge schematics. Many thanks to Joe 'Kingpin' Grand.https://en.wikipedia.org/wiki/Joe_GrandHave funThank you.COMPONENTS:27c512 (W27C512)74LS04 or 74HC042 Row 8 Pin 4P Positions 2.54mm Pitch DIP Switch100nf Ceramic Capacitor4pcs. 10K 1/4 Watt ResistorsDIP28 WIDE IC SOCKET (optional)DIP14 IC SOCKET (optional)

I have used these PCBs in an ISP programmer Shield for ‘Arduino UNO’. This programmer is compatible with the microcontrollers: ATmega 48/88/168 / 328P with 28 pins, and ATtiny 25/45/85 with 8 pins. ### TECHNICAL DETAILS / COMPONENTSISP programmer for ATmega / ATtinyBy making a small modification on the ATmega ISP programmer, we can make it compatible with ATtiny 8-pin micro-controllers. If we observe the distribution of the pins of the ATtiny microcontrollers, we can verify that if we inserted them in the socket of the ATmega programmer (28 pins), positioning the pin 1 of the ATtiny in pin 9 of the ISP programmer, we would hardly have to perform 2 changes in the circuit to be able to program them. 1) Pin 12 of the ISP programmer could be connected directly to the GND line, necessary to feed the ATtiny when we are programming it ... and the connection of pin 12 to GND of the ATmega doesn’t affect its programming. 2) In pin 9 of the ISP programmer we will have to put a small switch, by means of the position of a jumper, to connect the quartz crystal when we have to program an ATmega. When we have to program an ATtiny, pin 9 of the socket will have to be joined with pin 1 (changing the position of the jumper) ... since pin 9 of the socket corresponds to pin 1 of ATtiny = Reset (see the diagram) ### LEARN / TOPIC / BUILD INSTRUCTIONSFor more details to build an ISP programmer for ATmega / ATtiny, you can see them on my Web page:http://j-rpm.com/2018/07/shield-programador-isp-atmega-attiny-arduino/...sorry, but it's in Spanishhttp://j-rpm.com.es/2018/07/shield-programador-isp-atmega-attiny-arduino/

COMMODORE 64 - EPYX FASTLOAD CARTRIDGE A lot of experienced Commodore 1541, SD2iEC, Pi1541 users prefer EPYX FASTLOAD, because of its high compatibility with Commodore hardware and software. Every moment of your life is valuable, money can't buy time. I am sorry that; this is not a Time Travel Machine, but I hope this will help you to save a few valuable seconds of your life :) While working with Commodore's original Disk Operating System, Commodore Disk drives (1541, 1571...) or disk drive emulators (SD2iEC, Pi1541...) loading is slow. Epyx Fastload Cartridge increases the loading speed remarkable rate.Average Loading Speeds Comparison:Normal C64 Loading: 500 bytes per secondEpyx Fastload (1541): 2500 bytes per secondEpyx Fastload (SD2iEC): 8000 bytes per secondHere is; 180 blocks (45KB) loading video, from SD2iEC, with using Epyx Fastload:https://www.youtube.com/watch?v=sfkIw4P4sD0EPYX FASTLOAD CARTRIDGE also contains disk utilities and a machine code monitor for Commodore 64.You can find many more information about EPYX FASTLOAD CARTRIDGE from internet.If you have a suitable eprom programmer, then making your EPYX FASTLOAD CARTRIDGE is very simple now :)You can download Binary Eprom Image and user manuals from this link.https://archive.org/download/epyx-fast-load-1984-v-2-roms_202005/Epyx_FastLoad_1984_v2_ROMS.zip+5v- connection is for optional power source out for "Pi1541 ZERO" or "SD2iEC". (+5V 450mA)If you need; You can find "C64 Pi1541 ZERO HAT" (Pi Zero size) PCB from this link.https://www.pcbway.com/project/shareproject/RASPBERRY_Pi1541_ZERO_HAT_COMMODORE_64_DISC_DRIVE_EMULATOR_1.htmlIf you need; You can find "C64 SD2iEC COMBO" PCB from this link. (while using SD2iEC COMBO unconnected to expansion port, without kernal-cart function but with EPYX FASTLOAD) https://www.pcbway.com/project/shareproject/COMMODORE_64_SD2iEC___KERNAL_CART_COMBO.htmlIn order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have funThank you.Components:27c64 or 27c128 or 27c256 or 27c512 (DIP28)DIP28 wide IC socket74LS07DIP14 IC socket100nf CAPACITOR0.47 μF CAPACITOR2.7K 1/4 WATT RESISTANCERIGHT ANGLE TACTILE BUTTON (For optional RESET)If your programmer have capability to test IC chips, like 74LS series, then you should not forget to test them before soldering, some chips may have defect. (TL866 Minipro Programmer is able to test some of logic IC)Many thanks to Mark Payne for making a video of building Epyx Fast Load Cartridge.https://www.youtube.com/watch?v=NjBzjDka1vE

pistorm by captain-amygdala(A 68000 CPU replacement) 4 layers PCBFile name: PistormRevB_PCB_FAB.zip Project information: The PiStorm itself is an adapter board intended to be paired with a Raspberry Pi Model 3A+. It goes in the DIP socket on and acts in place of the CPU, but functionality can be extended beyond simple CPU emulation.IMPORTANT NOTE: Selling blank or complete PCBs or derivatives on eBay or elsewhere for excessive profit is frowned upon and may lead to forthcoming related projects being closed source.https://hackaday.com/2021/04/19/pistorm-brings-modern-muscle-to-the-amiga/https://github.com/captain-amygdala/pistormhttps://github.com/captain-amygdala/pistorm

1541 DIAGNOSTIC CARTRIDGEThis is a tested and working project.Commodore 1541 disk drive diagnostic cartridge is for testing and repairing 1541 5.25" flopy disk drive.For more information please visit software internet site: http://blog.worldofjani.com/?p=2180Eprom image download link:https://archive.org/download/1541diagnostic/1541DiagnosticCart%20V1.0.zipMany thanks to Jani for this great software.Many Thanks to Mert Uckan for artistic contributions.In order to protect your electronical devices, always turn off your Commodore 64 before connecting or unconnecting any device.Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!Have FunThank you.COMPONENTS:27c64 or 27c128 or 27c256 or 27c512100nf capacitorOptional Components:SMD 0805 RED LED (Led should be soldered reverse, light emiting side turned to PCB)SMD 0805 GREEN LED (Led should be soldered reverse, light emiting side turned to PCB)2PCS SMD 0805 1K Resistor (value change led luminance, some LEDs need more than 10K) RIGHT ANGLE TACTILE BUTTON (for reset)LEDs emit light when the power is on.