From 26b1bd7acb3cc0ebcfcaa0579402b45a208def59 Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Sat, 6 Feb 2016 18:54:57 +0100
Subject: [PATCH] fidel*: update notes

---
 src/mame/drivers/fidel6502.cpp | 10 ++++----
 src/mame/drivers/fidelz80.cpp  | 47 +++++++++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/src/mame/drivers/fidel6502.cpp b/src/mame/drivers/fidel6502.cpp
index 7c59d740167..f4f1013eb7b 100644
--- a/src/mame/drivers/fidel6502.cpp
+++ b/src/mame/drivers/fidel6502.cpp
@@ -302,7 +302,7 @@ WRITE8_MEMBER(fidel6502_state::fexcel_ttl_w)
 	// 74259 Q4-Q7,Q2,Q1: digit/led select (active low)
 	UINT8 led_sel = ~BITSWAP8(m_led_select,0,3,1,2,7,6,5,4) & 0x3f;
 
-	// a0-a2,d1: digit segment data (optional/model 6093)
+	// a0-a2,d1: digit segment data (model 6093)
 	m_7seg_data = (m_7seg_data & ~mask) | ((data & 2) ? mask : 0);
 	UINT8 seg_data = BITSWAP8(m_7seg_data,0,1,3,2,7,5,6,4);
 	
@@ -314,7 +314,7 @@ WRITE8_MEMBER(fidel6502_state::fexcel_ttl_w)
 	set_display_segmask(0x3c, 0x7f);
 	display_update();
 
-	// speech (optional/model 6092)
+	// speech (model 6092)
 	if (m_speech != nullptr)
 	{
 		// a0-a2,d2: 74259(2) to speech board
@@ -712,15 +712,15 @@ ROM_END
 
 ROM_START( fexcel )
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("101-1080a01.ic5", 0x8000, 0x8000, CRC(846f8e40) SHA1(4e1d5b08d5ff3422192b54fa82cb3f505a69a971) )
+	ROM_LOAD("101-1080a01.ic5", 0x8000, 0x8000, CRC(846f8e40) SHA1(4e1d5b08d5ff3422192b54fa82cb3f505a69a971) ) // same as fexcelv
 ROM_END
 
 ROM_START( fexcelv )
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("101-1080a01.ic5", 0x8000, 0x8000, CRC(846f8e40) SHA1(4e1d5b08d5ff3422192b54fa82cb3f505a69a971) )
+	ROM_LOAD("101-1080a01.ic5", 0x8000, 0x8000, CRC(846f8e40) SHA1(4e1d5b08d5ff3422192b54fa82cb3f505a69a971) ) // PCB1, M27256
 
 	ROM_REGION( 0x8000, "speech", 0 )
-	ROM_LOAD("101-1081a01.ic2", 0x0000, 0x8000, CRC(c8ae1607) SHA1(6491ce6be60ed77f3dd931c0ca17616f13af943e) )
+	ROM_LOAD("101-1081a01.ic2", 0x0000, 0x8000, CRC(c8ae1607) SHA1(6491ce6be60ed77f3dd931c0ca17616f13af943e) ) // PCB2, M27256
 ROM_END
 
 
diff --git a/src/mame/drivers/fidelz80.cpp b/src/mame/drivers/fidelz80.cpp
index 8ddb32ab675..7fdf806f635 100644
--- a/src/mame/drivers/fidelz80.cpp
+++ b/src/mame/drivers/fidelz80.cpp
@@ -633,7 +633,7 @@ NE556 dual-timer IC:
 
 Memory map:
 -----------
-6000-0FFF: 4K of RAM (2016 * 2)
+6000-0FFF: 4K RAM (2016 * 2)
 2000-5FFF: cartridge
 6000-7FFF: control(W)
 8000-9FFF: 8K ROM SSS SCM23C65E4
@@ -690,6 +690,51 @@ ROM A11 is however tied to the CPU's XYZ
 7000_77FF - English 2/2
 7800_7FFF - Bridge Challenger 2/2
 
+------------------
+RE info by hap, based on PCB photos
+
+Memory map:
+-----------
+0000-3FFF: 8K RAM (SRM2264)
+4000-7FFF: control (R/W)
+8000-FFFF: 32K ROM (M27256 compatible)
+
+control (W):
+------------
+Z80 A0-A2 to 3*74259, Z80 Dx to D (_C unused)
+
+Z80 D0:
+- Q4,Q5: led commons
+- Q6,Q7,Q2,Q1: 7seg panel digit select
+- Q0-Q3: 7442 A0-A3
+  + 0-7: led data
+  + 0-8: keypad mux
+  + 9: buzzer out
+
+Z80 D1: (model 6093)
+- Q0-Q7: 7seg data
+
+Z80 D2: (model 6092)
+- Q0-Q5: TSI C0-C5
+- Q6: TSI START pin
+- Q7: TSI ROM A11
+
+A11 from TSI is tied to TSI ROM A12(!)
+TSI ROM A13,A14 are hardwired to the 2 language switches.
+Sound comes from the Audio out pin, digital out pins are N/C.
+
+control (R):
+------------
+Z80 A0-A2 to 2*74251, Z80 Dx to output
+
+Z80 D7 to Y:
+- D0-D7: keypad row data
+
+Z80 D6 to W: (model 6092, tied to VCC otherwise)
+- D0,D1: language switches
+- D2-D6: VCC
+- D7: TSI BUSY
+
 ******************************************************************************/
 
 #include "emu.h"