/*
* 53c710 driver. Modified from Drew Eckhardts driver
* for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk]
*
* I have left the code for the 53c8xx family in here, because it didn't
* seem worth removing it. The possibility of IO_MAPPED chips rather
* than MEMORY_MAPPED remains, in case someone wants to add support for
* 53c710 chips on Intel PCs (some older machines have them on the
* motherboard).
*
* NOTE THERE MAY BE PROBLEMS WITH CASTS IN read8