This hardware is tempting. I have a lot of nostalgia for the Z80; coding in assembly felt like an altered state of mind.
As if I need another project, an EPROM programmer, or an RS232-to-USB bridge.
An ESP32 is literally 1,000 times faster.
Boy, so what's it gonna be?
As if I need another project, an EPROM programmer, or an RS232-to-USB bridge.
An ESP32 is literally 1,000 times faster.
Boy, so what's it gonna be?
Cracked it open. It turns out this isn't just a terminal; it's a complete Z80 microcomputer.
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
September 30, 2026 at 11:51 PM
This hardware is tempting. I have a lot of nostalgia for the Z80; coding in assembly felt like an altered state of mind.
As if I need another project, an EPROM programmer, or an RS232-to-USB bridge.
An ESP32 is literally 1,000 times faster.
Boy, so what's it gonna be?
As if I need another project, an EPROM programmer, or an RS232-to-USB bridge.
An ESP32 is literally 1,000 times faster.
Boy, so what's it gonna be?
Cracked it open. It turns out this isn't just a terminal; it's a complete Z80 microcomputer.
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
September 29, 2026 at 9:26 PM
Cracked it open. It turns out this isn't just a terminal; it's a complete Z80 microcomputer.
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
The board is populated with the full Zilog ecosystem: a Z80 CPU, a PIO for parallel I/O, a DART (Dual Asynchronous Receiver/Transmitter) for serial communications, and a CTC for timing. RTC still keeps time
Which leads me to an #electronicsquestion
Has anyone tried to put a (windowless, one time programmable) EPROM in a place where it stays hot around the storage limit, and check if it gets significantly erased within years?
Might lead to a way to re-use them from scrap
Has anyone tried to put a (windowless, one time programmable) EPROM in a place where it stays hot around the storage limit, and check if it gets significantly erased within years?
Might lead to a way to re-use them from scrap
September 28, 2026 at 7:08 PM
Which leads me to an #electronicsquestion
Has anyone tried to put a (windowless, one time programmable) EPROM in a place where it stays hot around the storage limit, and check if it gets significantly erased within years?
Might lead to a way to re-use them from scrap
Has anyone tried to put a (windowless, one time programmable) EPROM in a place where it stays hot around the storage limit, and check if it gets significantly erased within years?
Might lead to a way to re-use them from scrap
Before turning it on, let's open it up to see if we can learn anything more. We have a 1993 copyright on the PCB, 1994 copyright on the 1.0.0 ROM. It's powered by a Motorola 68k core, and uses the same Zilog SCC serial chip for LocalTalk as the Mac did.
Does […]
[Original post on bitbang.social]
Does […]
[Original post on bitbang.social]
September 26, 2026 at 1:29 PM
Before turning it on, let's open it up to see if we can learn anything more. We have a 1993 copyright on the PCB, 1994 copyright on the 1.0.0 ROM. It's powered by a Motorola 68k core, and uses the same Zilog SCC serial chip for LocalTalk as the Mac did.
Does […]
[Original post on bitbang.social]
Does […]
[Original post on bitbang.social]
My copy of Yar's Revenge was an EPROM which lived on a piece of foam that went in our Atari 2600 developer cartridge we had. It wasn't until 30 fucking years later that I learned that what we had was a buggy as hell beta version. The actual game is still annoying as hell but worked.
September 25, 2026 at 2:29 AM
My copy of Yar's Revenge was an EPROM which lived on a piece of foam that went in our Atari 2600 developer cartridge we had. It wasn't until 30 fucking years later that I learned that what we had was a buggy as hell beta version. The actual game is still annoying as hell but worked.
I bought a Power Blade 2 cart for NES there. Clerk made me buy it first before he would open the cart to check the PCB. Total fake—EPROM conversion, bodge wires, electrical tape. The poor clerk then had to fight the owner on the phone to issue me a refund and got chewed out for opening the cart. 😑
September 24, 2026 at 3:06 PM
I bought a Power Blade 2 cart for NES there. Clerk made me buy it first before he would open the cart to check the PCB. Total fake—EPROM conversion, bodge wires, electrical tape. The poor clerk then had to fight the owner on the phone to issue me a refund and got chewed out for opening the cart. 😑
The 1702 has a great origin story: Dov Frohman invented the EPROM at Intel after studying defective chips whose floating gates trapped stray charge. He turned a failure mode into the product. And for years memory paid Intel's bills while the 8080 was the side bet. You were playing on the good stuff.
September 24, 2026 at 9:40 AM
The 1702 has a great origin story: Dov Frohman invented the EPROM at Intel after studying defective chips whose floating gates trapped stray charge. He turned a failure mode into the product. And for years memory paid Intel's bills while the 8080 was the side bet. You were playing on the good stuff.
* okay, having thought about this way too much, I think it’s technically EPROM (but not EEPROM)
September 24, 2026 at 1:53 AM
* okay, having thought about this way too much, I think it’s technically EPROM (but not EEPROM)
Cambiar eprom a cualquier Xbox Clásico.
youtu.be/1JuoM4atR3o?...
#xbox #eprom #retrogaming #emuladores
youtu.be/1JuoM4atR3o?...
#xbox #eprom #retrogaming #emuladores
Cambiar Eprom Xbox Clásico 32x0
YouTube video by Consolas de Juegos
youtu.be
September 23, 2026 at 5:30 AM
Cambiar eprom a cualquier Xbox Clásico.
youtu.be/1JuoM4atR3o?...
#xbox #eprom #retrogaming #emuladores
youtu.be/1JuoM4atR3o?...
#xbox #eprom #retrogaming #emuladores
Sega Made a Custom Mega CD BIOS for Sonic Team’s Kazuyuki Hoshino in 1991; 35 Years Later, the Rare Boot EPROM Has Resurfaced Online https://www.notebookcheck.net/1405792.html
Sega’s custom 1991 Sonic Mega CD BIOS resurfaces online
Hidden Palace has released a rare custom Mega CD BIOS created for Sonic Team creative director Kazuyuki Hoshino in 1991, featuring a personalized Sonic boot screen and modified revision text. The dumped EPROM offers a glimpse into Sega’s early CD development culture, though how the one-off gift left the company and resurfaced decades later remains unknown.
www.notebookcheck.net
September 22, 2026 at 5:48 PM
Sega Made a Custom Mega CD BIOS for Sonic Team’s Kazuyuki Hoshino in 1991; 35 Years Later, the Rare Boot EPROM Has Resurfaced Online https://www.notebookcheck.net/1405792.html
Radio Bulletin published many articles around the KIM-1 in Dutch.
I started a new project: translate the articles to English wit source, binary
Articles now published
Mastermind on the KIM
Morse decoding with the KIM
Melodiant
Frequencymeter
EPROM Programmer
retro.hansotten.nl/radio-bullet...
I started a new project: translate the articles to English wit source, binary
Articles now published
Mastermind on the KIM
Morse decoding with the KIM
Melodiant
Frequencymeter
EPROM Programmer
retro.hansotten.nl/radio-bullet...
September 20, 2026 at 5:42 PM
Radio Bulletin published many articles around the KIM-1 in Dutch.
I started a new project: translate the articles to English wit source, binary
Articles now published
Mastermind on the KIM
Morse decoding with the KIM
Melodiant
Frequencymeter
EPROM Programmer
retro.hansotten.nl/radio-bullet...
I started a new project: translate the articles to English wit source, binary
Articles now published
Mastermind on the KIM
Morse decoding with the KIM
Melodiant
Frequencymeter
EPROM Programmer
retro.hansotten.nl/radio-bullet...
BBC Radio 1 Dance
Radio 1's Essential Mix: Four Tet @ Boomtown 2026
Now Playing
G Jones & EPROM
1000 Cuts
Radio 1's Essential Mix: Four Tet @ Boomtown 2026
Now Playing
G Jones & EPROM
1000 Cuts
September 19, 2026 at 9:01 PM
BBC Radio 1 Dance
Radio 1's Essential Mix: Four Tet @ Boomtown 2026
Now Playing
G Jones & EPROM
1000 Cuts
Radio 1's Essential Mix: Four Tet @ Boomtown 2026
Now Playing
G Jones & EPROM
1000 Cuts
This is literally pre-expansion pack. EPROM chips to expand the synth memory 😮
September 19, 2026 at 3:55 AM
This is literally pre-expansion pack. EPROM chips to expand the synth memory 😮
Another ZX81 repair in 4 photos. This is the second board, and was covered in more detail in this weeks blog post.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
Tune in on Sunday to see part 3, covering restoration of the case and membrane.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
Tune in on Sunday to see part 3, covering restoration of the case and membrane.
September 18, 2026 at 12:48 PM
Another ZX81 repair in 4 photos. This is the second board, and was covered in more detail in this weeks blog post.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
Tune in on Sunday to see part 3, covering restoration of the case and membrane.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
Tune in on Sunday to see part 3, covering restoration of the case and membrane.
Maestro Urbaniak nie dokończył tego projektu, który dziś się ukazał, ale sądzę, że byłby z niego zadowolony 🕊🇵🇱🎻
youtu.be/LSc7RqZD6YA?...
youtu.be/LSc7RqZD6YA?...
Papaya (DJ EPROM REMIX)
YouTube video by MICHAL URBANIAK QUARTET - Topic
youtu.be
September 18, 2026 at 6:56 AM
Maestro Urbaniak nie dokończył tego projektu, który dziś się ukazał, ale sądzę, że byłby z niego zadowolony 🕊🇵🇱🎻
youtu.be/LSc7RqZD6YA?...
youtu.be/LSc7RqZD6YA?...
I was just watching You've Got Mail last night and the triple punch of 1. the dog being used as the macguffin by which Meg Ryan recognizes what's going on, 3. Tom Hanks, AND 3. "Over the Rainbow" being slathered over the whole thing - ya gots me, Nora Eprom: youtu.be/55oQA4cwd6M?...
You've Got Mail - Ending Scene
YouTube video by mattts777
youtu.be
September 16, 2026 at 8:10 PM
I was just watching You've Got Mail last night and the triple punch of 1. the dog being used as the macguffin by which Meg Ryan recognizes what's going on, 3. Tom Hanks, AND 3. "Over the Rainbow" being slathered over the whole thing - ya gots me, Nora Eprom: youtu.be/55oQA4cwd6M?...
It's quite possible I imagined the original LCD screen still worked on the Wideboy dev system. It was a while ago. I had another normal Gameboy I tested builds on with a dev cartridge (normal sized Gameboy cartridge that had an EPROM socket on board).
September 16, 2026 at 2:03 PM
It's quite possible I imagined the original LCD screen still worked on the Wideboy dev system. It was a while ago. I had another normal Gameboy I tested builds on with a dev cartridge (normal sized Gameboy cartridge that had an EPROM socket on board).
Unless you can Reburn the eprom
September 16, 2026 at 1:45 AM
Unless you can Reburn the eprom
I'll see if I still have my working PB10 in a box somewhere. Frankly this EPROM probably isn't anything special - I think these SMC devices expect a few bits of routing data and not much more.
September 15, 2026 at 2:45 PM
I'll see if I still have my working PB10 in a box somewhere. Frankly this EPROM probably isn't anything special - I think these SMC devices expect a few bits of routing data and not much more.
Thanks. There is a version that uses a more modern surface mount EPROM, but for some reason they placed it on the top of the board.
September 15, 2026 at 1:55 PM
Thanks. There is a version that uses a more modern surface mount EPROM, but for some reason they placed it on the top of the board.
No breadboarding here: just hard-wired veroboard with no safety net! The empty sockets are for the 6502, 2732 EPROM, and the 6522 VIA. I have no idea what happened to the EPROM, but the 6502 and 6522 were reused in other projects.
September 14, 2026 at 2:41 AM
No breadboarding here: just hard-wired veroboard with no safety net! The empty sockets are for the 6502, 2732 EPROM, and the 6522 VIA. I have no idea what happened to the EPROM, but the 6502 and 6522 were reused in other projects.
For the memory, you can use:
- Original SNES Mask ROM: up to 4MB
- SNES Mask ROM to TSOP adapter boards: up to 4MB
- 27C801 UV EPROM: up to 1MB
- 27C160 UV EPROM: up to 2MB
- 29F160 to 27C160 UV EPROM adapter board: up to 4MB, AND makes the board OSCR-flashable
This is the 29F160 to 27C160 adapter:
- Original SNES Mask ROM: up to 4MB
- SNES Mask ROM to TSOP adapter boards: up to 4MB
- 27C801 UV EPROM: up to 1MB
- 27C160 UV EPROM: up to 2MB
- 29F160 to 27C160 UV EPROM adapter board: up to 4MB, AND makes the board OSCR-flashable
This is the 29F160 to 27C160 adapter:
September 13, 2026 at 6:16 PM
For the memory, you can use:
- Original SNES Mask ROM: up to 4MB
- SNES Mask ROM to TSOP adapter boards: up to 4MB
- 27C801 UV EPROM: up to 1MB
- 27C160 UV EPROM: up to 2MB
- 29F160 to 27C160 UV EPROM adapter board: up to 4MB, AND makes the board OSCR-flashable
This is the 29F160 to 27C160 adapter:
- Original SNES Mask ROM: up to 4MB
- SNES Mask ROM to TSOP adapter boards: up to 4MB
- 27C801 UV EPROM: up to 1MB
- 27C160 UV EPROM: up to 2MB
- 29F160 to 27C160 UV EPROM adapter board: up to 4MB, AND makes the board OSCR-flashable
This is the 29F160 to 27C160 adapter:
#PubMurciaSalud Clinician-led, AI-assisted clinical software development: multi-domain verification of a deployed ePROM application @Area6VegaMedia
Redirecting
doi.org
September 13, 2026 at 3:02 PM
#PubMurciaSalud Clinician-led, AI-assisted clinical software development: multi-domain verification of a deployed ePROM application @Area6VegaMedia
New blog post - The second ZX81 board repair.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
This time with an internal 16K RAM upgrade, an EPROM ROM replacement and a switching regulator 7805 replacement.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
This time with an internal 16K RAM upgrade, an EPROM ROM replacement and a switching regulator 7805 replacement.
September 13, 2026 at 11:24 AM
New blog post - The second ZX81 board repair.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
This time with an internal 16K RAM upgrade, an EPROM ROM replacement and a switching regulator 7805 replacement.
blog.tynemouthsoftware.co.uk/2026/09/zx81...
This time with an internal 16K RAM upgrade, an EPROM ROM replacement and a switching regulator 7805 replacement.