Hmmmm.......?
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Hmmmm.......?
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Ready? Go!
In all seriousness, please keep this a friendly competition, no ?
Also, out of curiosity, what features will this RAM cart have? All I currently see is a giant PCB with no chips and no evidence if it even works. Pics/videos of operation or it never happened...
In all seriousness, please keep this a friendly competition, no ?
Also, out of curiosity, what features will this RAM cart have? All I currently see is a giant PCB with no chips and no evidence if it even works. Pics/videos of operation or it never happened...
SGDK homebrew dev and Unity3D Indie dev.
Sega does what Nintendont!
Sega does what Nintendont!
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Re: Hmmmm.......?
Yes, it does work (there are two working units right now).
But it's not ready for release just yet
BTW: If you build one it has a BOM cost of under 25 EUR.
Imagine the rebates if I approach the fab with a large order
EDIT: @Hardwareman: I don't really need DTACK for anything, nor do I need TIME
But it's not ready for release just yet
BTW: If you build one it has a BOM cost of under 25 EUR.
Imagine the rebates if I approach the fab with a large order
EDIT: @Hardwareman: I don't really need DTACK for anything, nor do I need TIME
Re: Hmmmm.......?
Awesome, well done Oerg!Oerg866 wrote:Yes, it does work (there are two working units right now).
Re: Hmmmm.......?
25€ !!!
I can't wait for the specs !!!
I can't wait for the specs !!!
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Re: Hmmmm.......?
Well,
I've been a bit busy with school, so I'm just now finishing up the hard and softwarre side as far as the USB interface is concerned.
The specs right now are as follows:
* 6KB of internal firmware memory (it offers some diagnostic features such as mem test, ROM view, booting the Mega CD if you have one, etc.)
* 8 MB of SDRAM (100MHz CL2), the upper 1MB or so will be reserved once I get to implement debugging capabilities.
* USB 2.0 (Mini-B) interface (~4.5 MiB/s actual throughput)
* Fits in regular MD cartridge shell
* Quite a few debugging capabilities if you are developing the binary you are debugging (e.g. hardware ports to transfer arbitrary information to the host and whatnot) - of course you will have regular debugging functionality in any case
Here is the BOM as of october 2015:
https://www.youtube.com/watch?v=LnFkxlQZF8c
https://www.youtube.com/watch?v=az5gR-P6wYw
(Excuse my voice and the lackluster presentation. It's 9AM and I haven't slept ...)
Cheers!
Eric
I've been a bit busy with school, so I'm just now finishing up the hard and softwarre side as far as the USB interface is concerned.
The specs right now are as follows:
* 6KB of internal firmware memory (it offers some diagnostic features such as mem test, ROM view, booting the Mega CD if you have one, etc.)
* 8 MB of SDRAM (100MHz CL2), the upper 1MB or so will be reserved once I get to implement debugging capabilities.
* USB 2.0 (Mini-B) interface (~4.5 MiB/s actual throughput)
* Fits in regular MD cartridge shell
* Quite a few debugging capabilities if you are developing the binary you are debugging (e.g. hardware ports to transfer arbitrary information to the host and whatnot) - of course you will have regular debugging functionality in any case
Here is the BOM as of october 2015:
Here are some videos of its current state:11.68 Xilinx XC3S50AN Spartan 3AN FPGA
1.36 Alliance Memory, inc. AS4C4M16S-6TCN (4MBit * 16 SDRAM)
0.32 Diodes Incorporated AP2114H-3.3TRG1 3.3V 1A SOT223 regulator
0.32 Diodes Incorporated AP2114H-1.2TRG1 1.2V 1A SOT223 regulator
2.10 3x 74LVC(H)16245A 16-Bit Tri-State Bus Transceivers
3.79 FTDI FT232H 480mbps USB to UART/FIFO interface
0.20 Microchip Technology 93LC56BT-I/OT 2Kbit Config EEPROM for FT232H
1.12 passives (caps/res/etc)
1.53 100MHz Oscillator
= 22.42 EUR
https://www.youtube.com/watch?v=LnFkxlQZF8c
https://www.youtube.com/watch?v=az5gR-P6wYw
(Excuse my voice and the lackluster presentation. It's 9AM and I haven't slept ...)
Cheers!
Eric
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Re: Hmmmm.......?
Very happy to see actual level converters on there...
What does db stand for? Well that's an excellent question...
http://www.db-electronics.ca
http://www.db-electronics.ca
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Re: Hmmmm.......?
Nice to see it working in the videos, and FAST! Those specs are a beast. I believe in the cart now .
(And sorry for the somewhat rude post back in June. )
(And sorry for the somewhat rude post back in June. )
SGDK homebrew dev and Unity3D Indie dev.
Sega does what Nintendont!
Sega does what Nintendont!
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Re: Hmmmm.......?
A few infidelities in the original board layout has made this necessary:
https://www.youtube.com/watch?v=s-9fzbxOe18
Switched from LDO to a switched reg for the 3.3, added /Time (For HardWareMan ), added a failsafe jumper for FPGA core updates via USB (I just learned about multibooting FPGA bitstreams), brought down the BOM cost per unit even further and generally improved the routing of all busses immensely...
Maybe during the summer I am going to be looking for additional beta testers
https://www.youtube.com/watch?v=s-9fzbxOe18
Switched from LDO to a switched reg for the 3.3, added /Time (For HardWareMan ), added a failsafe jumper for FPGA core updates via USB (I just learned about multibooting FPGA bitstreams), brought down the BOM cost per unit even further and generally improved the routing of all busses immensely...
Maybe during the summer I am going to be looking for additional beta testers
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Re: Hmmmm.......?
Very good work! Auto-routers are for wimps! (And blokes who don't care for signal integrity)...
What does db stand for? Well that's an excellent question...
http://www.db-electronics.ca
http://www.db-electronics.ca
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Re: Hmmmm.......?
Time has come, my friends Time to beta-test the crap out of this.