Hello.
Im selling 2 6502 kits on ebay if anyone is interested.

This one is Richard Cini's version of the Daryl's sbc-2
https://www.ebay.com/itm/114358420683

I also have an APATCO 6502 sbc PCB
https://www.ebay.com/itm/114358433352

Wire wrapping lot for the old school enthusiast
https://www.ebay ...

Books sold!

Hello there.
I have the following retro computer books for sale if anyone is interested:

BugBook I
BugBook II
BugBook IIA (UARTs)
The 8080a BugBook

Im trying to sell them all as a lot at $35 + shipping
Let me know if you're interested
Thanks

Sorry Jim, it got sold

Hello everyone.

I've tried posting this at the Briel forum, but I'm waiting for Briel to add me to the forum.
I was hoping someone here might be interested in buying the kit from me.
I have an unbuilt SuperBoard III kit from Briel computers for sale. They are long sold out.
Im selling at $200 ...

Hi Jeff.
Indeed, it was very satisfying when I saw the words "OK" on my monitor

I only have the 74hc541, but I'll be ordering a new oscillator today from digikey!
Will try using a resistor, thanks for the tip!
Allmost there! Soon I'll have my own 6502 sbc
Thanks

Sorry but I don't have a schematic :cry:

My SBC is a copy of Daryl's SBC 2.5 (http://sbc.rictor.org/info2.html) I tried to keep as close as possible.
I wire wrapped/soldered on a protoboard following his schematics.

The only differences from his schematics:
Not using max232, but an FTDI breakout ...

Ok! Got my first serial data sent back and forth between my computer and the SBC!!!!!
Hurray!

The bad news... it only works if I have my arduino providing the clock :(
It's very strange because I have the 1MHz oscillator going through a 75hc541 and now the voltage is between 0-4.5v.
I can see ...

Oops! small fix to the code! Was outputting $AA instead of OK



pass 2

* = $8000

8000 ACIA_D = 7F70
8000 ACIA_S = 7F71

8000 VIA_A = 7F50
8000 VIA_B = 7F51

8000 LDA #$FF A9 FF
8002 STA $7F52 8D 52 7F
8005 STA $7F53 8D 53 7F

8008 LDA #$0B A9 0B
800A STA $7F72 8D 72 7F
800D STA VIA_A 8D 50 7F ...

Thanks BDD.
I always have a hard time fully understanding the electronics side of projects like that.
Programming is fine, but when comes to datasheets I get confused easily :lol:

Had a tiny progress this morning. Now that my oscillator is working I went back to getting my serial connection ...

Used a 74HC541 and now my 1MHz oscillator works!
Nest step, try serial!
Thanks guys

Hi Garth, sorry for my bad writing! I do have the socket soldered, not the oscillator :)
I meant, hope I can find a 8 pin half can oscillator because I dont have room for a 14 one.

I found this 1Mhz half can oscillator at digikey:
http://www.digikey.com/product-detail/en/ecs-inc/ECS-2100A-010/XC229 ...

Thanks Ed.
Apparently I can't read datasheets very well

I believe I do have a buffer ic somewhere. Will try using it!
What would be a good place to get a 1Mhz half can that outputs 5v logic?
I've already soldered a half can socket and have no space

Thanks

Here's the can oscillator I bought:
http://www.mouser.com/Search/ProductDet ... HST-3C-1.0

Datasheet says operating voltage 5v
But My peak is definitely below 3.5v

I wonder if Mouser sent me a 3.3v instead :/

Hi Jeff and BDD. Thanks for the help!

I tested and IRQB, NMIB, RDY and BE are HIGH (oscillating between 4 to 5v)
I have no BRK in my code, no interrupt either.
Its just incrementing a 16 bit value from 0000 to FFFF and outputing it on VIA port A&B.

I took out the can oscillator and put it on a ...