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Re: SAM Port

Hi, I am currently reverse engineering the SAM hardware. The design is very simple. The eight data lines are attached to a 74LS273, containing 8 D-flipflops, which are clocked by the Device select line of slot 4. The actual D/A conversion is done with a DAC0808 IC, which is amplified by a LM380 OpAm...
by palbeda
Mar Wed 28, 2012 3:30 pm
 
Forum: replica 1 General Discussion
Topic: SAM Port
Replies: 4
Views: 11783

Re: SAM Port

Hi all, Well, I could draw up the hardware easily I am sure, the hardware is not at all complex. Basically it contains of an address selector (or make it respond to EVERY write to CXXX), a simple D/A converter and an audio amplifier chip. To port the software, it becomes easier if you use the slot 4...
by palbeda
Mar Thu 08, 2012 9:18 am
 
Forum: replica 1 General Discussion
Topic: SAM Port
Replies: 4
Views: 11783

Re: Apple II-style audio

Hi Cowgod, Your post is four years old, but maybe you are still there somewhere? I built this card for the Apple I and enjoy this design. I played quite some time with Electric Duet on the Apple II. Do you still have the other Electric Duet files somewhere online?? By the way, your software also wor...
by palbeda
Mar Tue 06, 2012 9:24 am
 
Forum: Creation Room
Topic: Apple II-style audio
Replies: 3
Views: 10395

Re: Micro Chess ?

Manythanks!!! I glued it all into a file that can be loaded in one pass: ;100000D8A2FF9AA2C886B2201F1F206A1FC5F30884 ;100010F0F685F3C90CD00FA21FB5709550CA1008D7 ;100020F986DCA9CCD012C90ED00720B202A9EE08FB ;100030D007C914D00B20A20385FB85FA85F9D008E1 ;100040BFC90FD006204B034C9D014C960110000508 ;100050...
by palbeda
Dec Wed 28, 2011 6:39 am
 
Forum: Software
Topic: Micro Chess ?
Replies: 7
Views: 19648

Scanned text: Watch out for the "I", "l" and the "O"

Hello all, Great to find Briel on the Internet, just like I came across a candy store... I own an authentic KIM-1 and try to get some nice programs to work (most do). One piece of advice though (it cost me DAYS to solve this). It seems that most of the documentation on the Internet (including the pr...
by palbeda
Dec Wed 28, 2011 5:34 am
 
Forum: Software
Topic: Scanned text: Watch out for the "I", "l" and the "O"
Replies: 0
Views: 4025

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