Added support for Tandy 1000 HX and SL/2. As part of this commit :

- FDC now selects drive number from DOR (0x3f2)
- FDC now fails seeks on drives > 1
- XT systems no longer have BIOS mapping at E0000-EFFFF
- SN76489 now distinguishes between SN76496 (PCjr and early Tandy 1000), NCR8496 (later Tandy 1000 - different noise handling) and PSSJ
- Removed redundant limits on memory configuration - allows selection of 768k for Tandy 1000 SL/2

src/Makefile.mingw

@@ -10,14 +10,14 @@ OBJ = 386.o 386_dynarec.o 386_dynarec_ops.o 808x.o acer386sx.o ali1429.o amstrad
 	keyboard_olim24.o keyboard_pcjr.o keyboard_xt.o lpt.o mcr.o mem.o model.o mouse.o mouse_ps2.o \
 	mouse_serial.o neat.o nmi.o nvr.o olivetti_m24.o opti.o pc.o pci.o pic.o piix.o pit.o ppi.o ps1.o rom.o \
 	serial.o sis496.o sound.o sound_ad1848.o sound_adlib.o sound_adlibgold.o sound_cms.o sound_dbopl.o \
-	sound_emu8k.o sound_gus.o sound_mpu401_uart.o sound_opl.o sound_pas16.o sound_resid.o \
+	sound_emu8k.o sound_gus.o sound_mpu401_uart.o sound_opl.o sound_pas16.o sound_pssj.o sound_resid.o \
 	sound_sb.o sound_sb_dsp.o sound_sn76489.o sound_speaker.o sound_ssi2001.o sound_wss.o \
-	soundopenal.o timer.o um8881f.o um8669f.o vid_ati_eeprom.o vid_ati_mach64.o vid_ati18800.o \
+	soundopenal.o tandy_eeprom.o tandy_rom.o timer.o um8881f.o um8669f.o vid_ati_eeprom.o vid_ati_mach64.o vid_ati18800.o \
 	vid_ati28800.o vid_ati68860_ramdac.o vid_cga.o vid_cl5429.o vid_ega.o vid_et4000.o \
 	vid_et4000w32.o vid_et4000w32i.o vid_hercules.o vid_icd2061.o vid_ics2595.o vid_mda.o \
 	vid_olivetti_m24.o vid_oti067.o vid_paradise.o vid_pc1512.o vid_pc1640.o vid_pc200.o \
 	vid_pcjr.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_stg_ramdac.o vid_svga.o \
-	vid_svga_render.o vid_tandy.o vid_tgui9440.o vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o \
+	vid_svga_render.o vid_tandy.o vid_tandysl.o vid_tgui9440.o vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o \
 	vid_vga.o vid_voodoo.o video.o wd76c10.o win.o win-config.o win-d3d.o win-d3d-fs.o win-ddraw.o \
 	win-ddraw-fs.o win-deviceconfig.o win-hdconf.o win-joystick.o win-keyboard.o win-midi.o win-mouse.o \
 	win-status.o win-time.o win-video.o x86seg.o x87.o xtide.o pc.res