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BANK |
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BANK |
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SWITCHING |
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SWITCHING |
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8k + 8k + 8k+ (8k) = 32k |
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16k + 16k + 16k+ (16k) = 64k |
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VPP |
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1 |
VCC |
28 |
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A15 |
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1 |
VCC |
28 |
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A12 |
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2 |
A14 |
27 |
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A12 |
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2 |
A14 |
27 |
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A7 |
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3 |
A13 |
26 |
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A7 |
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3 |
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26 |
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A13 |
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A6 |
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4 |
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25 |
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A8 |
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A6 |
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4 |
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25 |
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A8 |
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A5 |
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5 |
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24 |
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A9 |
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A5 |
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5 |
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A9 |
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A4 |
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6 |
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23 |
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A11 |
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A4 |
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6 |
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A11 |
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A3 |
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7 |
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22 |
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VPP |
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A3 |
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7 |
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22 |
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VPP |
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A2 |
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8 |
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21 |
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A10 |
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A2 |
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8 |
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A10 |
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A1 |
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9 |
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CE |
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A1 |
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9 |
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CE |
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A0 |
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10 |
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19 |
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O7 |
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A0 |
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10 |
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19 |
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O7 |
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O0 |
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11 |
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18 |
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O6 |
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O0 |
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11 |
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18 |
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O6 |
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O1 |
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12 |
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17 |
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O5 |
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O1 |
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12 |
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17 |
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O5 |
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O2 |
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13 |
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16 |
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O4 |
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O2 |
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13 |
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16 |
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O4 |
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GND |
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14 |
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15 |
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O3 |
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GND |
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14 |
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15 |
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O3 |
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| Pin 27(A14) & 26(A13), Must be kept open
circuit |
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Pin 27(A14) & 26(A13), Must be kept open circuit |
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| (1) A wire
from Pin 13 & 14 to Switch-to (GND) |
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(1) A wire from Pin 13 & 14 to Switch-to
(GND) |
| (2) A 4.7K or
47K resistor placed via VCC to Pins 27 & 28 |
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(2) A 4.7K or 47K resistor placed via VCC to
Pins 27 & 28 |
| (3) A wire
from Pin 27(A14) & 26(A13) to
Switch |
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(3) A wire from Pin 27(A14) & 26(A13) to Switch |
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| STATE |
PIN 27 |
PIN 26 |
27256 (32K) |
27512 (64K) |
ROM |
PINS |
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| N/A |
LOW |
LOW |
0000-1FFF |
0000-3FFF |
N/A |
A13 + A14 |
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| SWPOS-1 |
LOW |
HIGH |
2000-3FFF |
4000-7FFF |
JIFFYDOS |
A14 + A15 |
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| SWPOS-2 |
HIGH |
HIGH |
4000-5FFF |
8000-BFFF |
DOLPHIN DOS |
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| SWPOS-3 |
HIGH |
LOW |
6000-7FFF |
C000-FFFF |
CBM DOS |
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©2007 "SPACETAXI - By The Vortex "
http://members.optusnet.com.au/spacetaxi64/ |
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HOME - Click Here to go back to SPACE TAXI |
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