Hi, Who know about MSX-hardware mail list?. If such be There is in view of hardware development. It is Correct have on slot-connector the pins /TREFA,/TREFC,/TREFR ? /TREFA Timing Reference A (output, active Low, tri-state). This timing reference signal goes Low at the end of T2 and returns High at the end of T4 during a memory read, memory write or refresh transaction. It can be used to control the address multiplexer for a DRAM interface or as the /RAS signal at higher processor clock rates. /TREFC Timing Reference C (output, active Low, tri-state). This timing reference signal goes Low at the end of T3 and returns High at the end of T4 during a memory read, memory write or refresh transaction. It can be used as the /CAS signal for DRAM accesses. /TREFR Timing Reference R (output, active Low, tri-state). This timing reference signal goes Low at the end of T1 and returns High at the end of T4 during a memory read, memory write or refresh transaction. It can be used as the /RAS signal for DRAM accesses. Wanted their use. But in the mode DMA affiliated charge must their form. This complicates its contents. /UMCS Upper Memory Chip Select (output, active Low, tri-state). This signal is activated during a memory read, memory write, or optionally a refresh transaction when accessing the highest portion of the linear address space within the first 16 Mbytes, but only if this chip select function is enabled. /LMCS Low Memory Chip Select (output, active Low, tri-state). This signal is activated during a memory read or memory write transaction when accessing the lower por-tion of the linear address space within the first 16 Mbytes, but only if this chip select function is enabled. /MCS3-/MCS0 Mid-range Memory Chip Selects (output, active Low, tri-state). These signals are individually active during memory read or write transactions when accessing the mid-range portions of the linear address space within the first 16 Mbytes. These signals can be individually enabled or disabled. Too the most. Why Zilog did not do a possibility of shaping these signals in DMA mode. Z380 in mode of seizure of buses could read address and form signals /XMCSX :) Bye Valery **** MSX Mailinglist. To unsubscribe, send an email to [EMAIL PROTECTED] and put in the body (not subject) "unsubscribe msx [EMAIL PROTECTED]" (without the quotes :-) Problems? contact [EMAIL PROTECTED] (www.stack.nl/~wiebe/mailinglist/) ****
