ABC COMPUTER COMPANY, LTD.
A4865
Processor |
80486DX |
Processor Speed |
33MHz |
Chip Set |
OPTI |
Max. Onboard DRAM |
32MB |
Cache |
64/128/256/512KB |
BIOS |
AMI |
Dimensions |
330mm x 218mm |
I/O Options |
32-bit external memory card slot |
NPU Options |
4167 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
External battery |
J10 |
Turbo LED |
JP12 |
Power LED & Keylock |
J23 |
Reset switch |
SW1 |
Speaker |
J24 |
Turbo switch |
SW2 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
Monitor type select color |
JP1 |
Closed |
Monitor type select monochrome |
JP1 |
Open | |
» |
CMOS memory normal operation |
JP2 |
pins 2 & 3 closed |
CMOS memory clear |
JP2 |
pins 1 & 2 closed | |
» |
Normal operation - do not alter |
JP205 |
Open |
Factory test (system burn in) |
JP205 |
Closed |
DRAM CONFIGURATION | ||||
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
NONE |
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
NONE |
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1MB x 9 |
16MB |
(4) 4M x 9 |
NONE |
NONE |
NONE |
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
NONE |
24MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
NONE |
28MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 1M x 9 |
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
NONE |
36MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
40MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
48MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
NONE |
52MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
64MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
Note:Banks 2 & 3 are utilized when a 32-bit external memory card is installed. |
CACHE CONFIGURATION | ||||
Size |
Bank 0 |
Bank 1 |
Tag |
Dirty Bit |
64KB |
(8) 8K x 8 |
NONE |
(1) 8K x 8 |
(1) 64K x 1 |
128KB |
(8) 8K x 8 |
(8) 8K x 8 |
(1) 8K x 8 |
(1) 64K x 1 |
256KB |
(8) 32K x 8 |
NONE |
(1) 32K x 8 |
(1) 64K x 1 |
512KB |
(8) 32K x 8 |
(8) 32K x 8 |
(1) 32K x 8 |
(1) 64K x 1 |
CACHE JUMPER CONFIGURATION | |||||
Size |
JP8 |
JP9 |
JP10 |
JP11 |
JP206 |
64KB |
open |
open |
open |
open |
pins 2 & 3 closed |
128KB |
closed |
open |
open |
closed |
pins 2 & 3 closed |
256KB |
closed |
closed |
open |
closed |
pins 2 & 3 closed |
512KB |
closed |
closed |
closed |
closed |
pins 1 & 2 closed |