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frames/emu_frame.html
You can e-mail comments to me here.
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Video Game Collecting & Arcade Projects
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arcade.html
Game Conversions
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games.html
JAS emulation (retired)
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frames/emu_frame.html
Click for Charles The Cat
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cats.html
who this JROK character is ???
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about.html
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http://www.jrok.com/msf/images/msf_2018_PCB_med.jpg
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http://www.jrok.com/wsf/WSF_2017_v1_31.html
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bzf/bzf_2018_v21_med.jpg
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http://www.jrok.com/wsf/WSF_2017_v1_31.html
www.arcadeshop.com
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http://www.Arcadeshop.com
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http://www.jrok.com/wsf/WSF_2017_v1_31.html
Click to see fullsize
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http://www.jrok.com/wsf/WSF_2017_v1_31.html
WSF 1.3x manual
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http://www.jrok.com/wsf
WSF firmware updates
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http://www.jrok.com/wsf/updates
www.arcadeshop.com
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http://www.Arcadeshop.com
Current Zooq firmware
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http://www.jrok.com/zooq/updates
Current M
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http://www.jrok.com/msf/updates
SF firmware update
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http://www.jrok.com/msf/updates
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msf/brd_reva_larger.jpg
Full-size
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http://www.jrok.com/hardware/bzf/bzf_prod_01.jpg
Image
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msf/brd_reva_larger.jpg
MSF Manual & user guide
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http://www.jrok.com/msf/manual
MSF firmware & menu update files
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http://www.jrok.com/msf/updates
http://www.arcadeshop.com
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http://www.arcadeshop.com
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http://www.jrok.com/hardware/bzf/bzf_prod_01.jpg
Big Pic
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http://www.jrok.com/hardware/bzf/bzf_prod_01.jpg
Berzerk & BZF benchmark results
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http://www.jrok.com/hardware/bzf/berzerk_benchmarking.html
Berzerk or Frenzy to BZF JAMMA wiring
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http://www.jrok.com/hardware/bzf/adapter/bzf_wiring.html
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hardware/bzf/bzv_proto_v00.jpg
Building & etching a clone of the P448 neckboard.
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http://jrok.com/project/neckboard/
The rotating monitor dynamo cabinet !
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http://jrok.com/project/rotateamon/rotating_a_monitor.html
System FPGA v1.1 shrunk prototype board
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hardware/wsf/wsf_v11.jpg
New batch of factory fresh PCB"s
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pics/fresh_PCBs.jpg
PIC32 - M4K MIPS
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http://www.microchip.com/pic32
XMOS
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http://www.xmos.com
Senior Web Developer
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images/co_worker.jpg
RGB Encoder & Component Encoder pages.
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http://jrok.com/hardware/RGB.html
LPC2138 development/test PCB
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http://jrok.com/hardware/arm/arm_lpc2138_pcb.jpg
Mylstar System_FPGA ( MSF ) board work-in-progress
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http://www.jrok.com/xfer/msf
MG Chemicals Photofabrication Process
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http://mgchemicals.com/techsupport/photo_intro.html
PQFP-208 bare board.
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http://jrok.com/xfer/pcb/PQFP208_etch.jpg
Full source in VHDL, wiring diagram and carrier PCB design
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project/2519_replacement/repro_25ls2519.html
ROM pcb comparison - Original and Repros
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http://jrok.com/hardware/wms/rom_pcbs.jpg
A Williams soundboard like no other
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http://www.jrok.com/hardware/wms/sound
Williams Arcade Hardware
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http://www.jrok.com/hardware/wms/
Defender I/O Widget Replacement - VHDL source & PCB layout
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project/defender_io/def_io.html
Here"s all the details, source and pcb layout for an Atari LETA on a Xilinx CPLD
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project/leta/index.htm
Rampart replacement GALs page
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hardware/rampart/RAMPART_gal.htm
Pengo IC74 / U74 replacement am25ls2519.
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http://jrok.com/project/pengo_u74/pengo_ic74_u74.html
Pengo Enhancement Pack & High Score Saver
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hardware/pengo_epack/pengo_epack.html
Pengo high score save.
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http://jrok.com/sohs/pengo/pengo.html
Yet Another ZX-spectrum AT Keyboard Interface....
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project/speckey/spec_key.html
Pikes Peak Cog Railway
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http://www.cograilway.com/
Custom 54xx using an Atmel AVR
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project/custom_ic/custom_ic_54xx_noise_generator.html
High Score Saverfor Mr. Do"s Castle !
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http://www.jrok.com/sohs/mrdo_castle_shs.html
Installingthe EAROM replacement on DigDug, Centipede and Millipede
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http://www.jrok.com/hardware/earom
RGBto video, s-video and component video encoders
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http://jrok.com/hardware/RGB.html
RGB Encoder wiring& mounting diagrams
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hardware/jrok_rgb_encoder_pinout_diagrams.html
RetroBlast RGB Encoder Review
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http://retroblast.arcadecontrols.com/reviews/JROK-RGB-to-Video-Encoder-12142006-01.html
Video sync-cleaner
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project/sync_cleaner/sync_pics.html
Random Scan XY Monitor conversion and a little yoke winding
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http://www.jrok.com/xfer/xystuff
Custom IC 03 for Bosconian, Xevious and Pole Position.
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http://www.jrok.com/hardware/custom_ic/cus03/
The CUS60 micro-controller an owners guide
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http://www.jrok.com/hardware/cus60/cus60_an_owners_guide.html
Panel Mount Phono Connectors
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http://jrok.com/hardware/RGBv4/panel_mount_phono.jpg
The worlds smallest encoder ?
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http://www.jrok.com/hardware/rgb_micro/micro.jpg
Click here to see the new encoders
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hardware/RGBv4/index.html
Click here to see the first productionboards.
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hardware/RGBv4/index.html
Bosconian/Galaga 51xx Install Guide
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http://www.jrok.com/hardware/custom_ic/custom_51_install.html
Rampart 136082 - 1004 Replacement GAL
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hardware/rampart/RAMPART_gal.htm
The Arcade
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http://jrok.com/arcade.html
Save Our High Scores
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http://www.jrok.com/sohs/savehs.html
Bosconian High Score Saver Install Guide
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http://www.jrok.com/sohs/bosco/bosco_hss.html
Xevious High Score Saver Install Guide.
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http://www.jrok.com/sohs/xev/xevious_hss.html
RGB to NTSC Video Encoder -
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hardware/RGB.html
Click to view !
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hardware/RGB.html
Foodfight PLS153 / 82S153 to GAL replacement
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hardware/ff_pls153/foodfight_pls153_to_GAL.htm
Arcade Other Bits & Pieces
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http://www.jrok.com/arcade.html
Obsolete parts Datasheet archive
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datasheet/index.html
Rolling Thunder to Hopping Mappy Conversion
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project/hopping_mappy/hopmap.html
LCD panel fun !
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hardware/lcd/lcd_panel_fun.html
Upclose and personal pic of the 5100.
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http://www.jrok.com/project/custom_ic/pics/51_pic_tl.jpg
Xevious replacements
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http://www.jrok.com/project/custom_ic/xev_cpu_replace.jpg
Galaga replacements
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http://www.jrok.com/project/custom_ic/gal_replace.jpg
06xx Upclose pic.
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http://www.jrok.com/project/custom_ic/pics/06_pic1.jpg
All the old news from years past is here !!
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old_news.html
Game Conversions
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games.html
Video Game Collecting & Arcade Projects
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arcade.html
JAS emulation
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frames/emu_frame.html
who this JROK character is ???
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about.html
Click for Charles The Cat
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cats.html
Arcade Game Info
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arcade.html
Emulation
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frames/emu_frame.html
Game Conversions
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games.html
Who is JROK ??
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about.html
Charles The Cat
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cats.html