VTECH INDUSTRIES, INC.
486 ASIC II
|
Processor |
80486SX/80487SX/ODP486SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/50(internal)/66(internal)MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
32MB |
|
Cache |
128KB |
|
BIOS |
Unidentified |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Front panel connector |
J2 |
Serial port 2 |
J11 |
|
IDE interface LED |
J3 |
IDE interface |
J12 |
|
External battery |
J4 |
Parallel port |
J13 |
|
Speaker |
J5 |
Game port |
J14 |
|
Floppy drive interface |
J9 |
VGA port |
J16 |
|
Serial port 1 |
J10 |
Riser Card |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
Factory configured - do not alter |
JP6 |
pins 2 & 3 closed |
|
» |
Battery type select internal |
JP7 |
pins 1 & 2 closed |
|
Battert type select external |
JP7 |
pins 2 & 3 closed | |
|
» |
CMOS memory normal operation |
JP8 |
pins 1 & 2 closed |
|
CMOS memory clear |
JP8 |
pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
JP9 |
Closed |
|
» |
Factory configured - do not alter |
JP11 |
pins 2 & 3 closed |
|
» |
On board I/O enabled |
JP17 |
Closed |
|
On board I/O disabled |
JP17 |
Open | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
1MB |
(4) 256K x 9 |
NONE |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
|
2MB |
(4) 512K x 9 |
NONE |
|
4MB |
(4) 512K x 9 |
(4) 512K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | |
|
Size |
Bank 0 |
|
128KB |
(4) 32K x 8 |
|
128KB |
(4) 32K x 9 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP1 |
JP2 |
JP3 |
JP4 |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
128KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
CPU TYPE CONFIGURATION | |
|
Type |
JP10 |
|
80486SX |
pins 1 & 2 closed |
|
ODP486SX |
pins 2 & 3 closed |
|
80487SX |
pins 2 & 3 closed |
|
80486DX |
pins 1 & 2 closed |
|
80486DX2 |
pins 1 & 2 closed |
|
Note: There is a PQFP socket installed but the location is unidentifed. These CPU types are installed in the PGA socket. | |
|
CPU SPEED CONFIGURATION | |
|
Speed |
JP5 |
|
20MHz |
pins 1 & 2, 5 & 6 closed |
|
25MHz |
pins 5 & 6 closed |
|
33MHz |
pins 1 & 2, 3 & 4 closed |
|
50iMHz |
pins 5 & 6 closed |
|
66iMHz |
pins 1 & 2, 3 & 4 closed |
|
VRAM CONFIGURATION |
|
Note: The size of the VRAM memory is unidentified. |