Description |
Pin/Setting |
Description |
|
| J8 (JPWDCLR) |
Closed |
Clear Password |
|
| |
*Open |
Normal Operation |
|
| J9 (Jcol) |
*Closed |
Color |
|
| |
Open |
Monochrome |
|
| J12 (Jirq9) |
*Closed |
Enable |
|
| IRQ 9 Enable |
Open |
Disable |
|
| J13 (Jio) |
1-2 |
Disabled |
|
| I/O Controller |
*2-3 |
Enabled |
|
| Disable |
|
|
|
| J14 (Jbte) |
1-2 |
Boot Block |
|
| Boot Select |
*2-3 |
Normal |
|
| J15 (Jvgae) |
1-2 |
Disabled |
|
| On-board VGA |
*2-3 |
Enabled |
|
| J16 (Jpare) |
*1-2 |
Enabled |
|
| Parity Chcking |
2-3 |
Disabled |
|
| J23 (Jca2/3) |
Any |
No Cache |
Note J23 & J25 are ignored if no ext. cache is installed |
| J25 (Jca17/2) |
1-2 |
128KB |
|
| Both jumpers |
2-3 |
256KB |
|
| must be set |
1-2 |
512KB |
|
| the same. |
|
|
|
| J24 (Jcsize) |
Any |
No Cache |
|
| |
No Jumper |
128KB |
|
| |
1-2 |
256KB |
|
| |
1-2,3-4 |
512KB |
|
| J27 (Jdack) |
*1-2 |
Channel 1 |
|
| J28 (Jdrq) |
2-3 |
Channel 3 |
|
| ECP DMA |
|
|
|
| Channel Select |
|
|
|
| J30 (Jeride) |
*1-2 |
Enabled |
|
| |
2-3 |
Disabled |
|
| J31 (Jbte) |
*Closed |
Enabled |
|
| On-board battery enable pins 3-4 only |
Open |
Disabled |
|
| J32 (Jsel) |
1-2 |
25MHz |
NoteDepends on CPU shipped with the system |
| |
*2-3 |
33MHz |
|
| J33 (Jsx) |
*5-6 |
SX CPU |
|
| |
1-2,3-4 |
All other CPUs |
|
| J34 (Jret) |
1-2 |
Reserved |
|
| |
*2-3 |
All CPU |
|
| J35 (Jldev) |
*Closed |
Enabled |
|
| |
Open |
Disabled |
|
| J36 (J(3.3v)) |
1-2,3-4 |
3.3V CPU |
|
| |
*3-5,4-6 |
5V CPU |
|
| J37 (Jmul) |
*No Jumper |
X3 Internal Clock |
|
| P24C Clock |
3-4 |
X2 Internal Clock |
|
| Mult. Control |
1-2 |
Other Multiplier |
|
| J40 (Jspk) On-board speaker enable pins 3-4 only |
*Closed |
Enabled |
|
| |
Open |
Disabled |
|