Reply 20980 of 27785, by TxSnipper
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Working on a project on a 1982 TRS-80 model 4 with 128K (also runs on a TRS-80 Model 3 with 48K), to replace the need for old Floppy Disk Controller board as well as floppy drives, by connecting to the FDC port of the mainboard and running 4 floppy drives from an SD-CARD, here is a peek of the work at hand; it handles so far LDos 531, LDos 631, CPM v2.2, TRSDos 1.3, and RapidDos 1.3 (more under testing) will be completed with a menu loader to mount images on the fly from DMK or HFE files format. so far has been tested with FREHD as the booting disk and FreHD hard drive images for LDOS 531, 631, CPMv2.2 and NewDos 80v2, carrying up to 5 x 7MB HDD Partitions (35MB Total) with 2 Floppy Drives (180k, 360k or 720k formats supported) UNit has been tested to work without issues from 2, 4, and 6 Mhz Z80 CPUs systems, further testing to be done on 8MHZ System later.
yes I also use an Amber Monitor on my Model 4
Main PC: 8700K, 16GB, RTX 2060, 2x500GB SSD, Asus 370 Gaming, 2x37"LG Monitor
Work PC: Quad 9400, 8GB, 240GB SSD, 1TB HDD, GT720
Retro PC: TRS-80 Model 4, 2x 360KB, 1x 720KB, 1x Gotek, FreHD 4x4MB HDD, RS232C-Wifi Modem