Ken, I was born in '95 and have never used any of these old computers but I've been binging all your videos! Keep it up, the production quality is great and your use of after effects to make technical details digestible is fantastic! :)
That is a proper mod, that is. Not some FPGA replacement for the CPU, but something that has been thoroughly thought out and is understandable. If it's not quite working right you could drop a scope probe onto the board and work out what's happening, something you can never do with a BGA256 packaged FPGA. Also, love the "use the clipped-off leads" solution.
I suspect the game display doesn't work because it's already driving the LCD controller at close to its maximum bandwidth at 2.5MHz. Length of the bullet sound is obviously implemented as a countdown loop and at 5MHz it's half the length. The frequency of the sound is controlled by the same 8155 that runs the serial port, hence patching the timer in for the 8155 to make the serial port work right also makes sure sounds are still the correct frequency.
Interesting mod, more than Id want to do to mine, but cool none the less, I do wish someone made are REX chips though, that is a mod Id love to do, lol, I have a dial a rom but it doesn't include additional memory.
Ken, I was born in '95 and have never used any of these old computers but I've been binging all your videos! Keep it up, the production quality is great and your use of after effects to make technical details digestible is fantastic! :)
That is a proper mod, that is. Not some FPGA replacement for the CPU, but something that has been thoroughly thought out and is understandable. If it's not quite working right you could drop a scope probe onto the board and work out what's happening, something you can never do with a BGA256 packaged FPGA. Also, love the "use the clipped-off leads" solution.
I’m so here for this content
Brilliant, as always!
You know it gets good when Ken whips out the old TL86
I suspect the game display doesn't work because it's already driving the LCD controller at close to its maximum bandwidth at 2.5MHz. Length of the bullet sound is obviously implemented as a countdown loop and at 5MHz it's half the length. The frequency of the sound is controlled by the same 8155 that runs the serial port, hence patching the timer in for the 8155 to make the serial port work right also makes sure sounds are still the correct frequency.
Thank You Ken.
Excellent! Enjoyed.
Great video! But, after I install this, will my barcode reader still work?
Interesting mod, more than Id want to do to mine, but cool none the less, I do wish someone made are REX chips though, that is a mod Id love to do, lol, I have a dial a rom but it doesn't include additional memory.
Wow