Apple Logic Board Informações Técnicas descarregar pdf (Página 75)

The LEDs are defined as follows (left to right when board is

oriented face up, with LEDs a the top of the board), A3, Al, AO,

RAM READ. When the board is read enabled ($CONO, $CON3, $CONS,

$CONB) the RAM READ LED is "on"

There are 16 possible states for the LEDS:

BANK, STATE A3 Al A0

16K bank 1, ROM READ off off off

16K bank 2, ROM READ off off on

16K bank 3, ROM READ off on off

16K bank 4, ROM READ off on on

16K bank 5, ROM READ on off off

16K bank 6, ROM READ on off on

16K bank 7, ROM READ on on off

16K bank 8, ROM READ on on on

16K bank 1, RAM READ off off off

16K bank 2, RAM READ off off on

16K bank 3, RAM READ off on off

16K bank 4, RAM READ off on on

16K bank 5, RAM READ on off off

16K bank 6, RAM READ on off on

16K bank 7, RAM READ on on off

16K bank 8, RAM READ on on on

D. DIAGNOSTIC PROGRAMS:

A memory test/diagnostic program is provided with the Saturn

64K and 128K RAM boards. The program RAMTEST64K is used for

testing the memory on a Saturn 64K board, and the program

RAMTEST128K is used for testing a Saturn 128K board. Program

operation is identical in both versions.

1. BRUN the appropriate RAMTEST program.

2. The program will ask for the slot number to test.

Respond with the slot # of the RAM board to be tested.

3. If an extensive memory test, including refresh tests,

is desired follow the slot * with a “F”.

for example, if the RAM board is in slot 0, then enter:

OF<CR>

to start the test.

4. The diagnostic test will run for several minutes, and

upon successful completion will display the prompt line:

ENTER SLOT NUMBERS TO TEST:

1 2 ... 70 71 72 73 74 75 76 77

Sem comentários

Apple Logic Board Informações Técnicas Página 75