Scion (MicroDiversions) MA512 / MA520 MicroAngelo Video Cards

  • Thread starter Thread starter Derek Simmons
  • Start date Start date
D

Derek Simmons

I’m trying to find a couple of MicroAngelo video cards and palette
card. I’m also interested in any manuals, engineering documents and
software. I’ve found a copy of the manual for the MA512.

I’m also interested in hearing about anybody experience with these
this graphics system. I will be assembling it in an IMSAI 8080.

Sincerely,
DerekSimmons aught FrontierNet daught net
 
I’m trying to find a couple of MicroAngelo video cards and palette
card.
Click to expand...

Derek,

I have the MA520 but no manual. I 've searched online over 'n over
till my eyes were tired but with no luck. I have the MA512 manual too
but it's not close to figure out the details for this card. I'm also
trying to build this into my Imsai system.

=Dan
[ = http://www2.applegate.org/~ragooman/ ]
 
I have the MA520 but no manual. I 've searched online over 'n over
till my eyes were tired but with no luck. I have the MA512 manual too
but it's not close to figure out the details for this card. I'm also
trying to build this into my Imsai system.
Click to expand...

I programmed up some AMOS drivers (supervisor calls) for a
MicroAngelo about 28 years ago ... so my memory is somewhat decayed.

Nevertheless; the card was based on a Z80 CPU where one could even
download "microcode" (native Z80 instructions) or simply operate the
graphic primitives by writing to the card's ports on S100. I don't
remember the port numbers nor the precise instructions. The card
only knew about the pixel universe. No inbuilt scaling, IIRC
I do remember that the card wasn't able to draw arcs; just straight
lines; and lack of a Z80 assembler meant that I was calculating arc
segments using trig-equivalent Taylor series - no more than 4 terms
required due to resolution limit - so no better than half-pixel
accuracy required.
 
I programmed up some AMOS drivers (supervisor calls) for a
MicroAngelo about 28 years ago ... so my memory is somewhat decayed.

Nevertheless; the card was based on a Z80 CPU where one could even
download "microcode" (native Z80 instructions) or simply operate the
graphic primitives by writing to the card's ports on S100. I don't
remember the port numbers nor the precise instructions. The card
only knew about the pixel universe. No inbuilt scaling, IIRC
I do remember that the card wasn't able to draw arcs; just straight
lines; and lack of a Z80 assembler meant that I was calculating arc
segments using trig-equivalent Taylor series - no more than 4 terms
required due to resolution limit - so no better than half-pixel
accuracy required.
--
/"\ Bernd Felsche - Innovative Reckoning, Perth, Western Australia
\ /  ASCII ribbon campaign | When we remember that we are all mad,
 X   against HTML mail     | the mysteries disappear and life stands
/ \  and postings          | explained. -- Mark Twain
Click to expand...

I just noticed something that may be of use for a manual at
http://www.pestingers.net/PDFs/S100_computers/SCION.pdf
 
I just wanted to let everybody know I'm still looking for MicroAngelo
video and palette boards and/or information on them. About half the
private responses I received were from people that were also
interested in finding manuals and software. I plan sharing anything I
find or receive. I have an offer from someone to host the information.

Thanks,
Derek
 
["Followup-To:" header set to comp.os.cpm.]
http://www.pestingers.net/PDFs/S100_computers/SCION.pdf

I can't get this link to load no matter how any times I've tried.
Has anybody managed to view this link ?

=Dan
Click to expand...
May be a server problem. I can traceroute to that site, but firefox just
says "Waiting for www.pestingers.net..." I found Google's cached version
of pestinger's main page, but the links from it don't respond, and
archive.org seems to be down.
 
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