[Simh] retargetable assembler

[Timothe Litt]

On 06-Sep-17 09:21, khandy21yo wrote:
> Reading the Wikipedia page about Whirlwind, it mentions that the pdp1
> is a direct descendent, so would a pdp1 assembler work? Or a tx0
> Assembler? I don't know if these already exist or not.
>
> Is the pdp1 a transistorized Whirlwind as the Wikipedia article
> suggests? We already have an emulator for that.
>
> Anyway, I remember reading about the tx0, and that they were always
> modifying the instruction set in hardware. For this early machine, was
> there even an official assembler Format? And which character sets did
> it use, probably not ascii.
>
ASCII didn't exist in the whirlwind timeframe; not until mid 1960s. 
IIRC, TX0 used a 5 level code from the Frieden flexowriter.  Probably
similar to Baudot.  Don't know about whirlwind.

yes, the architecture of early machines was fluid...



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20170906/a81d2373/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4577 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20170906/a81d2373/attachment.bin>