Differences

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--- builderpages:plasmo:cb030:cb030_rev1:cb030r1_memmap [2021/09/17 18:31] – Initial import from Wayback Machine
+++ builderpages:plasmo:cb030:cb030_rev1:cb030r1_memmap [2026/06/15 13:05] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 /* Imported from Wayback Machine
-   Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:cb030:cb030_rev1:cb030r1_memmap
+   Original URL : https://www.retrobrewcomputers.org/doku.php?id=builderpages:plasmo:cb030:cb030_rev1:cb030r1_memmap
-   Snapshot date: 2021-09-17
+   Snapshot date: 2025-02-02
    Generator    : wayback-archiver
 */
@@ Line 16: / Line 16: @@
 Compact flash interface is 0xFFFF_E000-0xFFFF_EFFF
+RC2014-like expansion slot is from 0xFFFF_C000-0xFFFF_CFFF for I/O addresses (nIORQ signal asserted), 0xFFFF_D000 to 0xFFFF_DFFF for memory addresses (nMREQ signal asserted).
 Remap register is 0xFFFF_8000-0xFFFF_8FFF, any access (read or write) to 0xFFFF_8000 will cause EPROM to reside in 0xFE00_0000 to 0xFEFF_FFFF
+(rev1.2 version of CPLD) 100Hz level 2 autovector interrupt turned on by accessing 0xFFFF_9800. Turn off the 100Hz timer by accessing 0xFFFF_9000
 Once the remap register is access, the memory map is changed to:
-RAM from 0x0 to 0x7FF_FFFF. If the DRAM is single bank 16 meg DRAM, it is located at 0x0-0x100_0000 and aliased three time to 0x400_0000. If the DRAM is 64 meg, then it is located at 0x0-0x3FF_FFFF. If the DRAM is 128meg it is located from 0x0-0x7FF_FFFF.
+RAM from 0x0 to 0x7FF_FFFF. If the DRAM is single bank 16 meg DRAM, it is located at 0x0-0x100_0000 and aliased three time to 0x3FF_FFFF. If the DRAM is 64 meg, then it is located at 0x0-0x3FF_FFFF. If the DRAM is 128meg it is located from 0x0-0x7FF_FFFF.
 EPROM from 0xFE00_0000 to 0xFEFF_FFFF, the EPROM is 512K, the memory is aliased every 512K up to 0xFEFF_FFFF.
@@ Line 30: / Line 34: @@
 Compact flash interface is 0xFFFF_E000-0xFFFF_EFFF
+RC2014-like expansion slot is from 0xFFFF_C000-0xFFFF_CFFF for I/O addresses (nIORQ signal asserted), 0xFFFF_D000 to 0xFFFF_DFFF for memory addresses (nMREQ signal asserted).
 Remap register is 0xFFFF_8000-0xFFFF_8FFF, any access (read or write) to 0xFFFF_8000 will cause EPROM to reside in 0xFE00_0000 to 0xFEFF_FFFF.