diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme162/include/bsp.h')
| -rw-r--r-- | c/src/lib/libbsp/m68k/mvme162/include/bsp.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme162/include/bsp.h b/c/src/lib/libbsp/m68k/mvme162/include/bsp.h index 54e74da532..37b16cb69b 100644 --- a/c/src/lib/libbsp/m68k/mvme162/include/bsp.h +++ b/c/src/lib/libbsp/m68k/mvme162/include/bsp.h @@ -1,6 +1,6 @@ /* bsp.h * - * This include file contains all MVME162 board IO definitions. + * This include file contains all MVME162fx board IO definitions. * * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. * On-Line Applications Research Corporation (OAR). @@ -165,6 +165,13 @@ typedef volatile struct mcchip_regs { * Prototypes for the low-level serial io are also included here, * because such stuff is bsp-specific (yet). The function bodies * are in console.c + * + * NOTE from Eric Vaitl <evaitl@viasat.com>: + * + * I dropped RTEMS into a 162FX today (the MVME162-513). The 162FX has a + * bug in the MC2 chip (revision 1) such that the SCC data register is + * not accessible, it has to be accessed indirectly through the SCC + * control register. */ enum {portB, portA}; @@ -190,10 +197,11 @@ typedef volatile struct scc_regs { #define ZREAD0(port) (scc[port].csr) #define ZREAD(port, n) (ZWRITE0(port, n), (scc[port].csr)) -#define ZREADD(port) (scc[port].buf) +#define ZREADD(port) (scc[port].csr=0x08, scc[port].csr ) #define ZWRITE(port, n, v) (ZWRITE0(port, n), ZWRITE0(port, v)) -#define ZWRITED(port, v) (scc[port].buf = (unsigned char)(v)) +#define ZWRITED(port, v) (scc[port].csr = 0x08, \ + scc[port].csr = (unsigned char)(v)) /*----------------------------------------------------------------*/ /* |