old gold times, when people used UV-ROM to build their own made boards

[legacy]

So, I want to tell it through images 







GameBoy, a couple of hacked cartridges



GameBoy cartridges hack, a look of the inside: the (mad) wiring



GameBoy cartridges hack, a look of the inside: meet the MBC chip



GameBoy cartridges hack, a NVRAM replaces the ROM



Classic design, my first home made HC11 board
whose RAM socket has been used to program
a NVRAM for a GB hacked cartridge



Classic design, my first i'51 board
whose RAM socket has been used to program
a NVRAM for a GB hacked cartridge


A few application-ROMs




The (home made) programming socket



It was also useful to dump the content of a console's BIOS.



New MC6809 board preview, still waiting to be cooked and assembed.
It will for sure use an UVROM for its firmware, but during the development
it will be loaded with the the same NVRAM trick used in the GB hacked cart.



A few empty UV-ROM chips





That's all folks 

[Bruce Abbott]

The 6809 board looks very interesting. Are you going to release the design?


Here's my collection of EPROMs, and the programmer I built for my Amiga 1200.

[legacy]

Well, first it has to pass both the DFM (design for manufacturing) levels. Currently it's just an EDA project with a prototype made on breadboards, and the firmware is just a poor miniMON (able to upload S19). I am more focused on two completely different projects: new ISA on fpga and its debug processor.

The MC6809 project has been scheduled with the lowest priority 

[BrianHG]

The 6809 board looks very interesting. Are you going to release the design?


Here's my collection of EPROMs, and the programmer I built for my Amiga 1200.

Wow, back in 89, I built a similar programmer for my Amiga 1000.  Worked like a charm for all 8 bit eproms up to 4mbit.  At the time, 4mbit didn't exist, but, 32 pin 1mbit eprom spec just became available and I was prepared with extra bits on the address counter which I did end up using as my programmer lasted and worked on my A3000&A4000 through the mid 90's.  It ran circles around some very expensive IBM PC programmers, especially reads and verify.

[legacy]

The message here is: we can eventually use our home made boards, like the above, hc11 or 8051 board, to program a NVRAM, and use a NVRAM device (asynchronous static ram on parallel bus, with a   battery to retain the information when poweroff) as "ROM" for machines like GameBoy which bootstrap from a ROM-cartridge!

... Homemade ROM-programmers wont most likely do a poor job.

Have H.O.P.E. 
(hold on, pain ends)

[ali6x944]

So, I want to tell it through images 







GameBoy, a couple of hacked cartridges



GameBoy cartridges hack, a look of the inside: the (mad) wiring



GameBoy cartridges hack, a look of the inside: meet the MBC chip



GameBoy cartridges hack, a NVRAM replaces the ROM



Classic design, my first home made HC11 board
whose RAM socket has been used to program
a NVRAM for a GB hacked cartridge



Classic design, my first i'51 board
whose RAM socket has been used to program
a NVRAM for a GB hacked cartridge


A few application-ROMs




The (home made) programming socket



It was also useful to dump the content of a console's BIOS.



New MC6809 board preview, still waiting to be cooked and assembed.
It will for sure use an UVROM for its firmware, but during the development
it will be loaded with the the same NVRAM trick used in the GB hacked cart.



A few empty UV-ROM chips





That's all folks 

wow...gold!
amazing work

[legacy]

LOL 

funny, but can't you quote the whole forum when you reply ? 

(p.s. thanks, it's an advice for everybody is looking for "cheap" solution/doesn't want to put money on an ROM/Flash programmer. Say, it's an "option" that one might consider)

[ali6x944]

LOL