Differences

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--- boards:sbc:sbc-386ex:rev0 [2018/11/30 14:37]
jcoffman
+++ boards:sbc:sbc-386ex:rev0 [2018/11/30 14:42] (current)
jcoffman [SBC-386EX prototype (rev 0) Board]
@@ Line 1: / Line 1: @@
 ====== SBC-386EX prototype (rev 0) Board ======
-This board …
+This board is obsolete.  It was strictly used to become familiar with the 386EX processor chip.
 ==== The prototype board SBC-386EX-0 ====
@@ Line 9: / Line 10: @@
 This board take several short-cuts: SRAM instead of DRAM, limited peripherals. However, it is a test bed to learn …
-  -
+  - Enabling the slot-15 I/O ports (all of the on-chip goodies); and disabling them, too.
+  - Programming the I/O and memory chip selects. (critical)
-Enabling the slot-15 I/O ports (all of the on-chip goodies); and disabling them, too.
+  - Using 16-bit and 8-bit mixed ports.
+  - Accessing & programming the serial I/O port 0 at 0x03F8.
-  -
+  - Getting to the timers. Possible automatic determination of CPU clock speed.
+  - Using a new access method to get to the DS1302. Three pins on one of the parallel ports should work.
-Programming the I/O and memory chip selects. (critical)
+  - Enabling & using the 387SX math co-processor.
+  - Accessing peripherals on the ECB bus; i.e., other RetroBrew boards.
-  -
-Using 16-bit and 8-bit mixed ports.
-  -
-Accessing & programming the serial I/O port 0 at 0x03F8.
-  -
-Getting to the timers. Possible automatic determination of CPU clock speed.
-  -
-Using a new access method to get to the DS1302. Three pins on one of the parallel ports should work.
-  -
-Enabling & using the 387SX math co-processor.
-  -
-Accessing peripherals on the ECB bus; i.e., other RetroBrew boards.
 DRAM, synchronous serial I/O (SSIO), and DMA will have to wait for another prototype round.