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Darkstar #80873 08/13/12 03:52 PM
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Originally Posted By Darkstar
(couldn't find anything for the SC11046CN though)


Only seems to exist at Partminer. I do not have a way to obtain these at the moment.

Darkstar #80874 08/13/12 03:55 PM
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For both of those modems, the CPU is problematic. There don't seem to be any actual technical datasheets on the Rockwell "L39 series" (maybe it's an 8039 derivative? I'll run it by a few disassemblers and see), and as Stiletto noted only Partminer knows the SC110xx.

I'm kind of impressed they used a Z8530 for serial in a 2400 baud modem. That's hilariously over-specced for that application, although it'll certainly work.

Last edited by R. Belmont; 08/13/12 03:55 PM.
Darkstar #80875 08/13/12 03:57 PM
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Never heard of Partminer before.

Seems they offer a 2-day free membership; maybe someone could create a new account, download all the stuff needed during the first 2 days, then cancel the membership?

Darkstar #80876 08/13/12 04:11 PM
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Originally Posted By Darkstar
Never heard of Partminer before.

Seems they offer a 2-day free membership; maybe someone could create a new account, download all the stuff needed during the first 2 days, then cancel the membership?


Indeed, and I have done that in the past. The trick is coming up with a list of "all the stuff needed", which is why I often wait years in-between until I have a *massive* list. Either that or be generating disposable accounts at a large scale.

The alternative is to have an employer who has access (that's happened before with a friend of ours), or to have disposable income exceeding $1300/yr to pay for the access level necessary to obtain outdated datasheets (unless they've changed their pricing scheme once again)

The other problem is they often list, say, a parts description list from a ordering form or catalog as a "datasheet" - so that listed datasheet may have only one page, with one mention of the chip.

I often these days use icminer.com, which is a free Asian alternative (signed up thanks to Google Translate) and clearly has a partial (pirated?) copy of Partminer in their database. (Sadly they must not have got to SC11046...)

Darkstar #80889 08/14/12 09:47 AM
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Regarding the L39 MCU, it may be a 6502 variant. I found a programming manual for another MCU in the family which might be of use:

http://electronix.org.ru/datasheet/Faxs-Modems/1198-L28MCU.pdf

Darkstar #80890 08/14/12 12:23 PM
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Nice catch, but that increases the number of clones of me required to 17 by making "rewrite the 6502 family as a modern device" more interesting :P

Darkstar #80891 08/14/12 01:56 PM
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Enough clones?! Oh wait, wrong DNA wink.


A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]

We're searching for QMC2 translators and support for existing translations. Interested? See here!
Phil Bennett #80931 08/16/12 10:18 PM
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Disassembling the Rockwell ROM as 6510 opcodes turns out it *might* indeed be based on it. While most of it seems to be gibberish (many KIL or BRK instructions for example), some other parts make at least a little bit sense:
Code:

0001B23B: AD 00 06           lda  $0600
0001B23E: A6 E3              ldx  $E3
0001B240: 9D 01 81           sta  $8101,x
0001B243: 18                 clc  
0001B244: 65 E4              adc  $E4
0001B246: 85 E4              sta  $E4
0001B248: 8A                 txa  
0001B249: 38                 sec  
0001B24A: E9 02              sbc  #$02
0001B24C: CD 02 81           cmp  $8102
0001B24F: F0 04              beq  $B255
0001B251: E8                 inx  
0001B252: 86 E3              stx  $E3
0001B254: 60                 rts  
0001B255: A9 64              lda  #$64
0001B257: 8D 6B 9C           sta  $9C6B
0001B25A: A9 32              lda  #$32
0001B25C: 8D 6C 9C           sta  $9C6C
0001B25F: C2 04              nop  #$04
0001B261: 1E 06 60           asl  $6006,x
0001B264: 20 D2 31           jsr  $31D2
0001B267: A5 E4              lda  $E4
0001B269: F0 04              beq  $B26F
0001B26B: DF 50 01           dcp  $0150,x
0001B26E: 60                 rts  


(this is from the second 64k of the ROM, that's why the addresses don't match up)

Sure looks interesting

Darkstar #80937 08/17/12 12:34 AM
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It's likely 65C02 at that date, which has more opcodes than the 6502/6510.

Darkstar #80978 08/19/12 09:31 PM
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Completely new system: AlphaSmart Pro. Its processor is a 68HC11, it uses an LCD display and has 128 KB non-volatile SRAM. Communicates with the PC or Mac via the keyboard connector, either PS/2 or... whatever it is that thing the Mac uses on that S-Video-like connector.

Really, it could be a general-purpose computer if not for its restrictive ROM that limits it to be a text editor.

Here's the ROM: http://users.vialink.com.br/jcastro/AlphaSmartPro212.rar - it's a 27C256 but the first 16KB are zeroed out.

Here is mine, opened up: http://imgur.com/a/R7tEs

Oh, and hello to all and a tip of the hat to Mr. Zapf. wink

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