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Vectrex Internals - (nf)
| Vectrex Internals - (nf) [message #10446] |
Wed, 08 August 2012 00:44 |
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Originally posted by: utzoo!decvax!harpo!seismo!hao!hplabs!hp-pcd!kirk\!russ
<pre>Article-I.D.: hp-pcd.640
Posted: Fri Feb 4 12:01:58 1983
Received: Mon Feb 7 00:45:26 1983
#N:kirk:20400004:000:1121
kirk!russ Feb 2 15:46:00 1983
This is in response to the article wondering about
what is inside a Vectrex. The original article appeared
some time ago. This response did not make it out to the
net due to a problem with notesfile transmissions.
So you wanna know what's inside a Vectrex?
Relevant ICs
------------
68A09
6522 - VIA (Versatile Interface Adapter)
8912 - General Instruments sound chip
1408 - 8 bit D/A
house numbered Sharp ROM ( probably 2364 equivalent)
74LS00
74LS32
Cartridges contain a house numbered Sharp ROM
(probably 2332 equivalent)
Socket Socket
1 HALT* 2 VCC
3 A7 4 VCC
5 A6 6 A8
7 A5 8 A9
9 A4 10 A11
11 A3 12 ??
13 A2 14 A10
15 A1 16 A15
17 A0 18 D7
19 D0 20 D6
21 D1 22 D5
23 D2 24 D4
25 GND 26 D3
27 GND 28 GND
------------------------
Cartridges don't use the following signals
29 A12 30 R/W* ??
31 A13 32 ??
33 A14 34 NMI*
35 ?? 36 IRQ*
I wrote a letter to the "Vectrex R&D Manager" asking for
schematics and a listing. No response yet. Any help in
reverse engineering would be appreciated.
Russ Nelson
...kirk!russ
503 929-6278
</pre>
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