Re: Potential typo in N8-2511 Schematic

[nbreeden <nbre...@live.com>]

Yep, I meant IOBASE + 16. The comment in the schematic needs to be
corrected.
-Neil

On Jul 30, 12:52 pm, John Coffman <john...@gmail.com> wrote:
> On 07/30/2011 11:08 AM, nbreeden wrote:In documenting the I/O Port to various devices mappings I can across the following comment in the schematic: CS_FDC is IO Base + 12 CS_UTIL is IO Base + 28 0 is /DACK 1 is /LDCR 2 is /LDOR 3 is /DACK and TC In looking over the schematic I believe the correct offset for CS_UTIL is IO BASE + 15You mean IO_BASE + 16 don't you?
> The outputs from U58 (LS138) are addressed by A4,A3,A2, putting them at intervals of 4.
> /CS_PPI1    IO_BASE + 0
> /CS_PPI2    IO_BASE + 4
> /CS_RTC     IO_BASE + 8
> /CS_FDC    IO_BASE + 12
> /CS_UTIL    IO_BASE + 16
> /ACRCS      IO_BASE + 20
> /VDPCS      IO_BASE + 24
> /SNDCS      IO_BASE + 28IO BASE + 28 is the PSG--John