Re: Super Serial Card help

[Jim <jim@magrathea.plus.com>]

On 2008-03-20, gbody@aapt.net.au <gbody@aapt.net.au> wrote:
> I have had a look at the rom data that you can see in slot 2 and it is
> valid but from a different part of the rom.
> The code you are seeing in slot 2 matches what is found at CB00.CB07
> in the expansion rom space for the rom on the card.
> Check if the decoding for the expansion rom is working.You should be
> able see the same or similar data (depends on version of the ROM) by
> typing in the following and comparing the output to the table
> underneath.
>
> CALL -151
> CFFF
> C200
> C800.C807
> C900.C907
> CA00.CA07
> CB00.CB07
> CC00.CC07
> CD00.CD07
> CE00.CE07
> CF00.CF07
>
> C800- 20 9B C9 A9 16 48 A9 00
> C900- B7 A5 27 48 BD 38 07 29
> CA00- 3C 85 27 20 02 CC 20 BA
> CB00- D2 CA 90 15 B9 88 C0 09
> CC00- 08 40 20 F5 CA D0 FB 98
> CD00- 4B 90 DF 45 43 80 46 E3
> CE00- 7F C9 20 D0 09 C0 03 F0
> CF00- 2C 58 FF 70 0C 38 90 18
>
> If you have the same data repeated at different addresses then the
> address lines to the rom are not decoded correctly.
> The likely faulty component would be the 74LS32 as this would be used
> to force the 3 most significant address lines high to the card rom
> when addressing the CnXX address range.

Again, thank you. It's likely to be tomorrow now before I get chance to try
anything (having a very, very bad day so far) but I'm off work tomorrow
(Bank Holiday in Blighty) so it'll give me something to do.

Jim
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